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kottke.org posts about space

The first asteroid from outside our solar system pays us a visit

posted by Jason Kottke   Nov 21, 2017

Asteroid Oumuamua

Back in October, the solar system welcomed a visitor from interstellar space…the first interstellar asteroid ever detected.

Astronomers have confirmed that an object that recently passed by our planet is from outside our Solar System — the first interstellar asteroid that’s ever been observed. And it doesn’t look like any object we’ve ever seen in our cosmic neighborhood before.

Follow-up observations, detailed today in Nature, have found that the asteroid is dark and reddish, similar to the objects in the outer Solar System. It doesn’t have any gas or dust surrounding it, like comets do, and it’s stretched long and skinny, looking a bit like an oddly shaped pen. It’s thought to be about a quarter-mile long, and about 10 times longer than it is wide. That makes it unlike any asteroids seen in our Solar System, none of which are so elongated.

Here’s a video of the asteroid’s path through the solar system:

Um, folks…that looks like a rocket. How do we know this “asteroid” isn’t actually an ancient alien ship that’s become encrusted with rock over millions of years? Or an ancient weapon gone awry? We’ve all seen the first Star Trek movie, right? (I am only a little bit kidding about this.)

Jimmy Iovine and most bomb record in the solar system

posted by Jason Kottke   Nov 15, 2017

While preparing for a conference talk/conversation I’m doing in Amsterdam this weekend, I was reading about the Golden Record that NASA sent along as a potential greeting from Earth to alien civilizations who might run across the Voyager probes in interstellar space millions of years from now. For the 40th anniversary of the Voyager launches, science writer Timothy Ferris (author of the Pulitzer-nominated Coming of Age in the Milky Way) wrote about the production of the Record for the New Yorker.

In the winter of 1976, Carl was visiting with me and my fiancee at the time, Ann Druyan, and asked whether we’d help him create a plaque or something of the sort for Voyager. We immediately agreed. Soon, he and one of his colleagues at Cornell, Frank Drake, had decided on a record. By the time nasa approved the idea, we had less than six months to put it together, so we had to move fast. Ann began gathering material for a sonic description of Earth’s history. Linda Salzman Sagan, Carl’s wife at the time, went to work recording samples of human voices speaking in many different languages. The space artist Jon Lomberg rounded up photographs, a method having been found to encode them into the record’s grooves. I produced the record, which meant overseeing the technical side of things. We all worked on selecting the music.

Carl Sagan was project director, Ann Druyan the creative director, and Ferris produced the Record. And the sound engineer for the Golden Record? I was surprised to learn: none other than Jimmy Iovine, who was recommended to Ferris by John Lennon.

I sought to recruit John Lennon, of the Beatles, for the project, but tax considerations obliged him to leave the country. Lennon did help us, though, in two ways. First, he recommended that we use his engineer, Jimmy Iovine, who brought energy and expertise to the studio. (Jimmy later became famous as a rock and hip-hop producer and record-company executive.)

Lennon, Springsteen, Tom Petty, Patti Smith, Stevie Nicks, Interscope, Dre, Snoop, Death Row Records, Eminem, Lady Gaga, Beats By Dre, Apple, *and* The Golden Record? Iovine is like the record industry’s Forrest Gump or something. How was this not in The Defiant Ones?

How to make an Extremely Large Telescope

posted by Jason Kottke   Nov 09, 2017

The Giant Magellan Telescope, currently under construction at the University of Arizona’s Mirror Lab, will be one of the first of a new class of telescopes called Extremely Large Telescopes. The process involved in fashioning the telescope’s seven massive mirrors is fascinating. This is one of those articles littered with mind-boggling statements at every turn. Such as:

“We want the telescope to be limited by fundamental physics — the wavelength of light and the diameter of the mirror — not the irregularities on the mirror’s surface,” says optical scientist Buddy Martin, who oversees the lab’s grinding and polishing operations. By “irregularities,” he’s talking about defects bigger than 20 nanometers — about the size of a small virus. But when the mirror comes out of the mold, its imperfections can measure a millimeter or more.

Precision of 20 nanometers on something more than 27 feet in diameter and weighing 17 tons? That’s almost unbelievable. In this video, Dr. Wendy Freedman, former chair of the board of directors for the GMT project, puts it this way:

The surface of this mirror is so smooth that if we took this 27-foot mirror and then spread it out, from coast-to-coast in the United States, east to west coast, the height of the tallest mountain on that mirror would be about 1/2 an inch. That’s how smooth this mirror is.

You need that level of smoothness if you’re going to achieve better vision than the Hubble:

With a resolving power 10 times that of the Hubble Space Telescope, the GMT is designed to capture and focus photons emanating from galaxies and black holes at the fringes of the universe, study the formation of stars and the worlds that orbit them, and search for traces of life in the atmospheres of habitable-zone planets.

The telescope has a price tag of $1 billion and should be operational within the the next five years in Chile.

Gorgeous computer-generated animation of a nebula

posted by Jason Kottke   Nov 07, 2017

Designed by Teun van der Zalm, Nebulae is a computer generated nebula set to atmospheric music by Lee Rosevere. Worth seeking out a large screen for viewing. Several of van der Zalm’s other videos are equally beautiful variations on the same theme.

The 100-megapixel Moon

posted by Jason Kottke   Nov 06, 2017

100 Megapixel Moon

Seán Doran used images from the Lunar Reconnaissance Orbiter to create this 100-megapixel image of the Moon (full 10000x10000 pixel image here). Phil Plait explains how Doran made the image:

LRO WAC images have a resolution of about 100 meters per pixel over a swath of about 60 km of lunar surface (using what’s called the pushbroom technique, similar to how a flatbed scanner works). They are usually taken straight down, toward the spacecraft nadir (the opposite of the zenith). To get the correct perspective for the Moon as a globe, Doran took the images, along with altimeter data, and mapped them onto a sphere. That way features near the edge look foreshortened, as they really do when you look at the entire Moon. He also used Apollo images to make sure things lined up. So the image isn’t exactly scientifically rigorous, but it is certainly spectacular.

The image is also available at Gigapan for easier exploration.

The Universe is much bigger than it is old

posted by Jason Kottke   Oct 20, 2017

In a Twitter thread, author Oliver Morton compares the physical scale of the Universe with its age (from the perspective of humans).

If a human life is 70 years long, there has been room for 200 million lives since the big bang, but 200 million humans, end to end, would reach just a bit further than the moon. If you had started walking towards the centre of the galaxy on the day of the big bang (had there been days, you, paths & galaxies), you would have got about 20 parsecs by now: just 0.25% of the way.

Maybe walking pace is the wrong metric. A nerve impulse travels around 70 times faster than a person walks. But even at the speed of thought, the age of the universe is too small for something to have reached the centre of the galaxy.

The situation is even worse when you choose another reference object, like UY Scuti, the largest known star. The red hypergiant is nearly 1.5 billion miles across and, because of its size and position near the center of the galaxy, is probably around 13 billion years old, just a few hundred million years younger than the age of the Universe itself.

Even if you use light as a marker, the size of Universe remains unfathomably immense. Over the course of the Universe’s lifetime, a photon could have travelled 13.8 billion light-years, just 15% of the current estimate of the Universe’s diameter of 93 billion light-years. See also what are the physical limits of humanity?

The Astronomy Photographer of the Year for 2017

posted by Jason Kottke   Oct 04, 2017

Astronomy Photo 2017

Astronomy Photo 2017

Astronomy Photo 2017

Put on by the Royal Observatory Greenwich, The Astronomy Photographer of the Year is the largest competition of its kind in the world. For the 2017 awards, more than 3800 photos were entered from 91 countries. It’s astounding to me that many of these were taken with telescopes you can easily buy online (granted, for thousands of dollars) rather than with the Hubble or some building-sized scope on the top of a mountain in Chile.

The photos above were taken by Andriy Borovkov, Alexandra Hart, and Kamil Nureev.

SpaceX wants to send people to Mars by 2024

posted by Jason Kottke   Sep 29, 2017

Spacex BFR

Elon Musk says SpaceX is on target to send cargo to Mars in 2022 and people in 2024. The way the company will do it is by focusing its resources on a new vehicle, the Interplanetary Transport System (codename: the BFR). That vehicle will be able to travel to Mars, but can also be used to generate revenue for the company through launching satellites, resupplying the ISS, and going to the Moon.

Musk also proposed a variety of new uses for the scaled-down rocket beyond just going to Mars. Supposedly, the ITS can be used to launch satellites, take cargo to the International Space Station, and even do lunar missions to set up a Moon base. SpaceX’s current Falcon 9 fleet is used to do a few of those things already, but Musk says eventually the company will turn to the ITS to do all of its space missions.

“We can build a system that cannibalizes our own products, makes our own products redundant, then all the resources we use for Falcon Heavy and Dragon can be applied to one system,” he said at the conference. Musk says the cost of launching cargo on the ITS will be fairly cheap, too, since the rocket and spaceship will be a fully reusable system — unlike the Falcon 9, which is only 70 to 80 percent reusable.

Musk also astoundingly asserted that the same rocket system could be used for long-distance travel on Earth.

He ended his talk with a pretty incredible promise: using that same interplanetary rocket system for long distance travel on Earth. Musk showed a demonstration of the idea on stage, claiming that it will allow passengers to take “most long distance trips” in just 30 minutes, and go “anywhere on Earth in under an hour” for around the same price of an economy airline ticket.

As they say, “huge if true”. Musk is like the sci-fi Oprah here: You get a electric car! And you get a trip to Mars! And you get a self-driving car! And you get a 30-minute Hyperloop trip from SF to LA! And you get a rocket shuttle from NYC to Mumbai in 43 minutes for $1200! Beeeeeeeeees!!!!

Solar system artwork featuring the precise locations of the planets on the day of your birth

posted by Jason Kottke   Sep 19, 2017

Solar System Birthday Map

Spacetime Coordinates sells prints, metal mementos, and t-shirts that feature the planets of the solar system in the exact locations they were in on the date of your birth (or other significant date). For their new Kickstarter campaign, they’re offering color prints.

While not as pretty as these prints, you can check what the solar system looked like for any date here.

When I was a kid, I spent far too many hours mucking around in Lotus 1-2-3 trying to make a spreadsheet to calculate how often all the planets in the solar system would line up with each other (disregarding their differing planes, particularly Pluto’s).1 I could never get it working. Turns out that a precise alignment has probably never occurred, nor will it ever. But all the planets are “somewhat aligned” every 500 years or so. Neat! (via colossal)

  1. I spent many more hours making a spreadsheet of every single baseball card I owned and how much it was worth, updated by hand from Beckett’s price guide. Time well spent?

The intricate wave structure of Saturn’s rings

posted by Jason Kottke   Sep 07, 2017

Saturn Waves by Cassini

On one of its final passes of Saturn, the Cassini probe captured this image of a wave structure in Saturn’s rings known as the Janus 2:1 spiral density wave. The waves are generated by the motion of Janus, one of Saturn’s smaller moons.

This wave is remarkable because Janus, the moon that generates it, is in a strange orbital configuration. Janus and Epimetheus (see “Cruising Past Janus”) share practically the same orbit and trade places every four years. Every time one of those orbit swaps takes place, the ring at this location responds, spawning a new crest in the wave. The distance between any pair of crests corresponds to four years’ worth of the wave propagating downstream from the resonance, which means the wave seen here encodes many decades’ worth of the orbital history of Janus and Epimetheus. According to this interpretation, the part of the wave at the very upper-left of this image corresponds to the positions of Janus and Epimetheus around the time of the Voyager flybys in 1980 and 1981, which is the time at which Janus and Epimetheus were first proven to be two distinct objects (they were first observed in 1966).

The photograph is also an optical illusion of sorts. The rings appear to be getting farther away in the upper lefthand corner but the plane of the photograph is actually parallel to the plane of the rings…it’s just that the wavelength of the density wave gets shorter from right to left.

Update: Here are those density waves converted into sound waves. The first set sounds like an accelerating F1 car.

The Moon 1968-1972

posted by Jason Kottke   Sep 01, 2017

Apollo 11 Flag

The Moon 1968-1972 is a slim volume of photographs from the Apollo missions to the Moon that took place over four short years almost 50 years ago. The book contains a passage by E.B. White taken from this New Yorker article about the Apollo 11 landing in 1969.

The moon, it turns out, is a great place for men. One-sixth gravity must be a lot of fun, and when Armstrong and Aldrin went into their bouncy little dance, like two happy children, it was a moment not only of triumph but of gaiety. The moon, on the other hand, is a poor place for flags. Ours looked stiff and awkward, trying to float on the breeze that does not blow. (There must be a lesson here somewhere.) It is traditional, of course, for explorers to plant the flag, but it struck us, as we watched with awe and admiration and pride, that our two fellows were universal men, not national men, and should have been equipped accordingly. Like every great river and every great sea, the moon belongs to none and belongs to all. It still holds the key to madness, still controls the tides that lap on shores everywhere, still guards the lovers who kiss in every land under no banner but the sky. What a pity that in our moment of triumph we did not forswear the familiar Iwo Jima scene and plant instead a device acceptable to all: a limp white handkerchief, perhaps, symbol of the common cold, which, like the moon, affects us all, unites us all.

Newly processed photos of Jupiter taken by NASA’s Juno probe

posted by Jason Kottke   Aug 31, 2017

Jupiter Juno

Jupiter Juno

Jupiter Juno

Seán Doran shared some recently processed photos of Jupiter that he worked on with Gerald Eichstädt. The photos were taken by NASA’s Juno probe on a recent pass by the planet. These are like Impressionist paintings…you could spend hours staring at the whirls & whorls and never find your way out. There are more images of Jupiter in Doran’s Flickr album, including this high-resolution shot that you can download for printing.

Infographic of the fascinating timeline of the far future

posted by Jason Kottke   Aug 17, 2017

Timeline of The Far Future

Timeline of the far future is one of my favorite pages on Wikipedia. It details what might happen to humanity, human artifacts, the Earth, the solar system, and the Universe from 10,000 years from now until long past the heat death of the Universe. Information is Beautiful has made a lovely infographic of the timeline.

Reading through the timeline is a glorious way to spend time…here are a few favorites I noticed this time around as well as some from my first post.

August 20, 10,663: “A simultaneous total solar eclipse and transit of Mercury.”

20,000 years: “The Chernobyl Exclusion Zone, the 1,000 sq mi area of Ukraine and Belarus left deserted by the 1986 Chernobyl disaster, becomes safe for human life.”

296,000 years: “Voyager 2 passes within 4.3 light-years of Sirius, the brightest star in the night sky.”

1 million years: “Highest estimated time until the red supergiant star Betelgeuse explodes in a supernova. The explosion is expected to be easily visible in daylight.”

1 million years: “On the Moon, Neil Armstrong’s ‘one small step’ footprint at Tranquility Base will erode by this time, along with those left by all twelve Apollo moonwalkers, due to the accumulated effects of space weathering.”

15.7 million: “Half-life of iodine-129, the most durable long-lived fission product in uranium-derived nuclear waste.”

100 million years: “Future archaeologists should be able to identify an ‘Urban Stratum’ of fossilized great coastal cities, mostly through the remains of underground infrastructure such as building foundations and utility tunnels.”

1 billion years: “Estimated lifespan of the two Voyager Golden Records, before the information stored on them is rendered unrecoverable.”

4 billion years: “Median point by which the Andromeda Galaxy will have collided with the Milky Way, which will thereafter merge to form a galaxy dubbed ‘Milkomeda’.”

7.59 billion years: The Earth and Moon are very likely destroyed by falling into the Sun, just before the Sun reaches the tip of its red giant phase and its maximum radius of 256 times the present-day value. Before the final collision, the Moon possibly spirals below Earth’s Roche limit, breaking into a ring of debris, most of which falls to the Earth’s surface.

100 billion years: “The Universe’s expansion causes all galaxies beyond the Milky Way’s Local Group to disappear beyond the cosmic light horizon, removing them from the observable universe.”

Live TV coverage of Apollo 11 landing and moon walk

posted by Jason Kottke   Jul 20, 2017

Apollo 11 TV Coverage

48 years ago today, the lunar module from the Apollo 11 mission landed on the Moon. Later that same day, Neil Armstrong and Buzz Aldrin stepped out of the module, set foot on the surface, and went for a walk. And the entire world watched them do it. Live.

For the 40th anniversary of the landing in 2009, I put together a page where you can watch the original CBS News coverage of Walter Cronkite reporting on the Moon landing and the first Moon walk, synced to the present-day time. Just open this page in your browser and the coverage will start playing at the proper time. Here’s the schedule (all times EDT):

4:10:30 pm: Moon landing broadcast starts
4:17:40 pm: Lunar module lands on the Moon

4:20:15 pm: Break in coverage

10:51:27 pm: Moon walk broadcast starts
10:56:15 pm: First step on Moon
11:51:30 pm: Nixon speaks to the Eagle crew
12:00:30 am: Broadcast end (on July 21)

Here’s what I wrote when I launched the project:

If you’ve never seen this coverage, I urge you to watch at least the landing segment (~10 min.) and the first 10-20 minutes of the Moon walk. I hope that with the old time TV display and poor YouTube quality, you get a small sense of how someone 40 years ago might have experienced it. I’ve watched the whole thing a couple of times while putting this together and I’m struck by two things: 1) how it’s almost more amazing that hundreds of millions of people watched the first Moon walk *live* on TV than it is that they got to the Moon in the first place, and 2) that pretty much the sole purpose of the Apollo 11 Moon walk was to photograph it and broadcast it live back to Earth.

This is one of my favorite projects I’ve ever done, and it almost didn’t happen this year. I woke up this morning assuming it was just going to work again, just like it had the previous 8 years, but a bit of testing revealed that YouTube had discontinued the API I was using to display and time the videos. I wasn’t sure I had the JavaScript chops to fix it in time for the big show this afternoon. Luckily, I was able to solicit some help on Twitter and as the internet continues to be absolutely amazing, Geoff Stearns fixed the problem. As he said in his tweet, Stearns works for Google and wrote the YouTube API that had been discontinued, which is a bit like Marshall McLuhan popping out from behind a poster in Annie Hall, but instead of saying “you know nothing of my work”, he says “I’m gonna fix this up real quick”. Reader, it took him 14 minutes from saying “I’ll help” to posting the solution, and I’d bet half of that time was spent running to the fridge for a LaCroix and selecting the proper coding playlist on Spotify. So big thanks to Geoff for making this happen today! And thanks also to Brian Seward, who landed a solution in my inbox a bit after Geoff’s.

Oh, and no more Flash! So it’ll work on any modern browser with no plugins. But I tested it on my phone and it still doesn’t seem to work properly there…the video loads but doesn’t autoplay. Something to improve for next year!

NASA Apollo Saturn V Lego set

posted by Jason Kottke   Jun 22, 2017

Apollo 11 Lego

Lego has introduced an Apollo Saturn V rocket set, complete with lunar lander and 3 astronaut minifigs.

Packed with authentic details, it features 3 removable rocket stages, including the S-IVB third stage with the lunar lander and lunar orbiter. The set also includes 3 stands to display the model horizontally, 3 new-for-June-2017 astronaut microfigures for role-play recreations of the Moon landings, plus a booklet about the manned Apollo missions and the fan designers of this educational and inspirational LEGO Ideas set.

Three rocket stages! And look at this lander:

Apollo 11 Lego

Amazing detail: the set contains 1969 pieces, which is the year that the Apollo 11 astronauts landed on the Moon. I typically leave the Lego building to my kids, but I might have to make an exception for this. (via mike)

The view from Mars

posted by Jason Kottke   Jun 21, 2017

Mars Opportunity 2017

NASA’s Opportunity rover started exploring the surface of Mars in January 2004. Its mission was supposed to last about 90 days, but over 13 years later, Opportunity is still rolling around the red planet, doing science and taking photos. Jason Major processed a few of Opportunity’s most recent snaps of the Endeavour Crater and they’re just wonderful. I’m especially taken with the one included above…it belongs in a museum!

Vivid new images and flyby videos of Jupiter

posted by Jason Kottke   May 30, 2017

Jupiter South Pole Juno

NASA’s Juno spacecraft is currently orbiting around Jupiter and taking some of the best photos and scientific measurements we’ve seen of the solar system’s largest planet. The photo above is of Jupiter’s south pole, gathering point for massive cyclones.

Early science results from NASA’s Juno mission to Jupiter portray the largest planet in our solar system as a complex, gigantic, turbulent world, with Earth-sized polar cyclones, plunging storm systems that travel deep into the heart of the gas giant, and a mammoth, lumpy magnetic field that may indicate it was generated closer to the planet’s surface than previously thought.

“We are excited to share these early discoveries, which help us better understand what makes Jupiter so fascinating,” said Diane Brown, Juno program executive at NASA Headquarters in Washington. “It was a long trip to get to Jupiter, but these first results already demonstrate it was well worth the journey.”

Using data and photos from Juno, Gerald Eichstädt and Seán Doran have created these videos that approximate what it might look like flying by Jupiter in a spacecraft.

Wonderful.

Lunar, a short film about humankind’s journey to the Moon

posted by Jason Kottke   May 17, 2017

Using NASA still photographs and audio from the Apollo missions, Christian Stangl created this animated collage as a dedication “to all people who believe in peaceful expansion of our borders”.

In the year 1957 the cold war expands to space. The Soviet-Union sends Sputnik as the first manmade object into earth-orbit. 2 years later Yuri Gagarin enters space as the first man in space. The so called “Space Race” seems to be decided. But in 1961 President Kennedy promised to send American Astronauts to the moon. The Apollo Project was born. A space ship had to be built that is strong enough to escape earth’s gravitation, land on the moon and bring the crew safely back to earth.

I am a total sucker for everything Moon/Apollo related. To me, putting humans on the Moon is one of the best and most inspiring things we have ever done as a species, even though it’s the poster child for the right thing done for the wrong reason.

The latest SpaceX rocket launch and landing, start-to-finish

posted by Jason Kottke   May 01, 2017

This is cool. SpaceX has built a reusable rocket for launching things into space. The rocket takes off, separates from its payload, and then lands back on Earth, upright and intact on a landing pad. They’ve had several successful missions but this morning, they webcast the launch and return of the rocket with footage from long-range cameras and a camera fixed to the side of the rocket from start to finish.

The launch happens at 11:58, at 14:24 the main stage separates from the payload, and at 21:00, it’s on the ground — the whole thing is over in 9 minutes. And the views are super-clear (until clouds and exhaust from engines cloud the view right at the end) and the long continuous shot of the rocket is astounding…it looks totally fake, like out of a sci-fi movie.

Speaking of sci-fi, SpaceX CEO Elon Musk shared a better view of the rocket landing on Instagram…here it is on YouTube:

Look at the landing gear delicately fold down about 2 seconds before the landing. Looks totally CG! I’ve seen footage of these landings dozens of times and it’s still incredible.

What will the night sky look like in 5 million years?

posted by Jason Kottke   Apr 13, 2017

Based on the motions of the 2 million stars observed by ESA’s Gaia mission over the past two years, scientists created this simulated animation of how the view of the Milky Way in the night sky will evolve over the next 5 million years.

The shape of the Orion constellation can be spotted towards the right edge of the frame, just below the Galactic Plane, at the beginning of the video. As the sequence proceeds, the familiar shape of this constellation (and others) evolves into a new pattern. Two stellar clusters — groups of stars that were born together and consequently move together — can be seen towards the left edge of the frame: these are the alpha Persei (Per OB3) and Pleiades open clusters.

Stars seem to move with a wide range of velocities in this video, with stars in the Galactic Plane moving quite slow and faster ones appearing over the entire frame. This is a perspective effect: most of the stars we see in the plane are much farther from us, and thus seem to be moving slower than the nearby stars, which are visible across the entire sky.

Well, how’s that for some perspective? (via blastr)

The Orion Nebula, our friendly neighborhood star factory

posted by Jason Kottke   Apr 03, 2017

Orion Nebula

Rolf Olsen recently took this amazing photo of the Orion Nebula using a home-built telescope.

The Orion Nebula is one of the most studied objects in the sky and also has a significant place in the history of astrophotography. In 1880 it was the first ever nebula to be photographed; Henry Draper used the newly invented dry plate process to acquire a 51-minute exposure of the nebula with an 11 inch telescope. Subsequently, in 1883, amateur astronomer Andrew Ainslie Common recorded several exposures up to 60 minutes long with a much larger 36-inch telescope, and showed for the first time that photography could reveal stars and details fainter than those visible to the human eye.

Thanks to Phil Plait for the link…he’s got much more to say about the image and the nebula here.

Also called M42 (the 42nd object in a catalog kept by comet hunter Charles Messier in the late 18th century), it is a sprawling star factory, a gas cloud where stars are born. It’s a couple of dozen light-years across, and sits well over a thousand light-years from Earth. That’s 10,000 trillion kilometers, and you can see it with your naked eye! It’s so bright because of a handful of extremely massive hot stars sit in its center. They blast out ultraviolet light that energizes the gas in the nebula, causing it to glow.

It’s actually a small section of a much larger dark cloud, what’s called a molecular cloud, that we cannot see directly. Stars were born near the edge of that cloud, not too deeply inside it, and when they switched on their fierce light and stellar winds blew a hole in the cloud, popping it like a bubble. The Orion Nebula is a cavity in the side of that cloud, carved by the newborn stars.

A full rotation of the Moon

posted by Jason Kottke   Mar 31, 2017

All but a few humans have seen no more than half of the Moon with their own eyes. For the rest of us stuck on Earth, we only get to see the side that always faces the Earth because the Earth & Moon are tidally locked; the Moon’s rotation about its axis and its orbit around the Earth take the same amount of time. But NASA’s LRO probe has taken high-resolution photos of all but 2% of the Moon’s surface, which have been stitched together into this video of the Moon’s full 360-degree rotation.

A fictional flight above real Mars

posted by Jason Kottke   Mar 15, 2017

Using real images of Mars taken by the HiRISE camera on the Mars Reconnaissance Orbiter, Jan Fröjdman created a 3D-rendered flyover of several areas of the planet’s surface.

In this film I have chosen some locations and processed the images into panning video clips. There is a feeling that you are flying above Mars looking down watching interesting locations on the planet. And there are really great places on Mars! I would love to see images taken by a landscape photographer on Mars, especially from the polar regions. But I’m afraid I won’t see that kind of images during my lifetime.

It has really been time-consuming making these panning clips. In my 3D-process I have manually hand-picked reference points on the anaglyph image pairs. For this film I have chosen more than 33.000 reference points! It took me 3 months of calendar time working with the project every now and then.

Watch this in the highest def you can muster…gorgeous.

The Goddesses of Venus

posted by Jason Kottke   Mar 08, 2017

Goddesses Of Venus Map

Last year, Eleanor Lutz made a medieval-style map of Mars. As a follow-up, she’s made a topographical map of Venus. The features on Venus are named for female mythological figures & notable women and Lutz provides a small biography for each one on the map. Among those featured on the map are:

Anne Frank
Selu (Cherokee Corn Goddess)
Kali (Hindu Goddess, Mother of Death)
Virginia Woolf
Sedna (Eskimo Whose Fingers Became Seals and Whales)
Ubastet (Egyptian Cat Goddess)
Beatrix Potter
Edith Piaf

Here are the full lists of the craters, mountains, and coronae on Venus.

An appreciation of the Hubble’s Deep Field images

posted by Jason Kottke   Mar 03, 2017

More than 20 years ago, the Hubble Space Telescope took a photo of a patch of seemingly dark sky and, lo, it was filled with hundreds and hundreds of galaxies.

Hubble Ultra Deep Field

About ten years after that, they looked even deeper into the night sky and observed thousands of galaxies, each containing hundreds of billions of stars. The video above is an appreciation of these Deep Field images and what they taught us about the Universe.

In 1995, scientists pointed the Hubble Telescope at an area of the sky near the Big Dipper. The location was apparently empty, and the whole endeavour was risky — what, if anything, was going to show up? But what came back was nothing short of spectacular: an image of over 1,500 galaxies glimmering in a tiny sliver of the universe. Alex Hofeldt helps us understand the scale of this image.

NASA has found 7 Earth-like planets orbiting a single nearby star

posted by Jason Kottke   Feb 22, 2017

Trappist 1

Today NASA announced the discovery of seven planets “that could harbor life” around a dwarf star called Trappist-1.

The planets orbit a dwarf star named Trappist-1, about 40 light years, or about 235 trillion miles, from Earth. That is quite close, and by happy accident, the orientation of the orbits of the seven planets allows them to be studied in great detail.

One or more of the exoplanets - planets around stars other than the sun - in this new system could be at the right temperature to be awash in oceans of water, astronomers said, based on the distance of the planets from the dwarf star.

“This is the first time so many planets of this kind are found around the same star,” said Michael Gillon, an astronomer at the University of Liege in Belgium and the leader of an international team that has been observing Trappist-1.

Here’s the paper published in Nature.

The leisurely pace of light speed

posted by Jason Kottke   Jan 25, 2017

In a 45-minute video called Riding Light, Alphonse Swinehart animates the journey outward from the Sun to Jupiter from the perspective of a photon of light. The video underscores just how slow light is in comparison to the vast distances it has to cover, even within our own solar system. Light takes 8.5 minutes to travel from the Sun to the Earth, almost 45 minutes to Jupiter, more than 4 years to the nearest star, 100,000 years to the center of our galaxy, 2.5 million years to the nearest large galaxy (Andromeda), and 32 billion years to reach the most remote galaxy ever observed.1 The music is by Steve Reich (Music for 18 Musicians), whose music can also seem sort of endless.

If you’re impatient, you can watch this 3-minute version, sped up by 15 times:

  1. This isn’t strictly true. As I understand it, a photon that just left the Sun will never reach that most remote galaxy.

A beautiful aquarium supernova

posted by Jason Kottke   Jan 04, 2017

Using mostly old-school visual effects — like ink dispersing in an aquarium and poking holes in napkins (to represent stars) — Thomas Vanz created a pretty compelling representation of a dying star going supernova.

Novae is a movie about an astronomical event that occurs during the last evolutionary stages of a massive star’s life, whose dramatic and catastrophic death is marked by one final titanic explosion called supernova.

By only using an aquarium, ink and water, this film is also an attempt to represent the giant with the small without any computed generated imagery.

As a tribute to Kubrick or Nolan’s filmography, Novae is a cosmic poem that want to introduce the viewer to the nebulae’s infinite beauty.

Vanz documented his process in these two videos, which are almost as entertaining as the finished product.

The last steps on the Moon

posted by Jason Kottke   Nov 18, 2016

In May of 1961, President John F. Kennedy told Congress and the rest of the American public that the US was going to send a man to the Moon. Just over 11 years later, as part of the Apollo 17 mission in December 1972, humans set foot on the Moon for the last time.1 The Last Steps is a summary of that final mission, during which NASA accomplished the near-impossible yet again and was met with increasing public indifference about a journey that had taken on the ease of a car trip to grandma’s house.

Update: Perhaps humans will set foot on the Moon sooner than 2060. The European Space Agency is planning on a manned mission “by 2030” and China is shooting for 2036. (via @T_fabriek)

  1. For now, I guess I should add. It’s been 44 years since then and at the rate things are going, it might be another 44 years before it happens again. I’m hoping for a reboot of the Apollo franchise sooner rather than later, though.

Gorgeous ultra HD fly-through of the inside of the International Space Station

posted by Jason Kottke   Oct 28, 2016

NASA has uploaded a beautiful and relaxing 18-minute fly-through video of the International Space Station filmed in ultra high-definition 4K resolution. They used to a fisheye lens to film it, which means you get plenty of detail and depth of field.