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Posts Tagged ‘Space

“Earth is a small town with many neighborhoods in a very big universe”*…

… full of very large objects. From @nealagarwal, a scroll-able comparison of the size of the objects that surround us in in the universe: “Size of Space.”

(Listen to outer space here.)

For other nifty visualizations, visit his site and check out, e.g., “The Deep Sea.”

* Ron Garan


As we internalize insignificance, we might send distantly-observed birthday greetings to Harlow Shapley; he was born on this date in 1885. An astronomer known as “the Modern Copernicus,” he did important work first at the Mt. Wilson Observatory, and then as head of the Harvard College Observatory. He boldly and correctly proclaimed that the globulars outline the Galaxy, and that the Galaxy is far larger than was generally believed and centered thousands of light years away in the direction of Sagittarius: he discovered of the center of our Galaxy, and of our position within it.


Written by LW

November 2, 2020 at 1:01 am

“Evidently, the fundamental laws of nature do not pin down a single and unique universe”*…

For the World Is Hollow and I Have Touched the Sky Original printing of the Flammarion engraving, from 1888.
Artist unknown; from Camille Flammarion, L’Atmosphère: Météorologie Populaire

The name of the image—the “Flammarion engraving”—may not ring a bell, but you’ve seen it many times. It depicts a traveler wearing a cloak and clutching a walking-stick; behind him is a varied landscape of towns and trees; surrounding all is a crystalline shell fretted with countless stars. Reaching the edge of his world, the traveler pushes through to the other side and is dazzled by a whole new world of light and rainbows and fire.

The image was first published in 1888 in a book by French astronomer Camille Flammarion. (The original engraving was black and white, although colorized versions now abound.) He notes that the sky does look like a dome on which the celestial bodies are attached, but impressions deceive. “Our ancestors,” Flammarion writes, “imagined that this blue vault was really what the eye would lead them to believe it to be; but, as Voltaire remarks, this is about as reasonable as if a silk-worm took his web for the limits of the universe.”

The engraving has come to be seen as a symbol of humanity’s quest for knowledge, but I prefer a more literal reading, in keeping with Flammarion’s intent. Time and again in the history of science, we have found an opening in the edge of the known world and poked through. The universe does not end at the orbit of Saturn, nor at the outermost stars of the Milky Way, nor at the most distant galaxy in our field of view. Today cosmologists think whole other universes may be out there.

But that is almost quotidian compared to what quantum mechanics reveals. It is not just a new opening in the dome, but a new kind of opening. Physicists and philosophers have long argued over what quantum theory means, but, in some way or other, they agree that it reveals a vast realm lying beyond the range of our senses. Perhaps the purest incarnation of this principle—the most straightforward reading of the equations of quantum theory—is the many-worlds interpretation, put forward by Hugh Everett in the 1950s. In this view, everything that can happen does in fact happen, somewhere in a vast array of universes, and the probabilities of quantum theory represent the relative numbers of universes experiencing one outcome or another. As David Wallace, a philosopher of physics at the University of Southern California, put it in his 2012 book, The Emergent Multiverse, when we take quantum mechanics literally, “the world turns out to be rather larger than we had anticipated: Indeed, it turns out our classical ‘world’ is only a small part of a much larger reality.”…

If multiverses seem weird, it’s because we need to revamp our notions of time and space: “The Multiple Multiverses May Be One and the Same.”

* Alan Lightman, The Accidental Universe: The World You Thought You Knew


As we find one in many, we might send relativistic birthday greetings to Victor Frederick “Viki” Weisskopf; he was born on this date in 1908. A theoretical physicist who contributed mightily to the golden age of quantum mechanics, Weisskopf did postdoctoral work with Werner Heisenberg, Erwin Schrödinger, Wolfgang Pauli and Niels Bohr. He emigrated from Austria to the U.S. in 1937 to escape Nazi persecution. During World War II he was Group Leader of the Theoretical Division of the Manhattan Project at Los Alamos, and later campaigned against the proliferation of nuclear weapons.


Written by LW

September 20, 2020 at 1:01 am

“Few things are more enjoyable than lingering over the atlas and plotting a trip”*…


atlas of outer space


I’m excited to finally share a new design project this week! Over the past year and a half I’ve been working on a collection of ten maps on planets, moons, and outer space. To name a few, I’ve made an animated map of the seasons on Earth, a map of Mars geology, and a map of everything in the solar system bigger than 10km…

Data visualizer extraordinaire Eleanor Lutz has announced “An Atlas of Space.”

Follow her progress on her blog Tabletop Whale, or on Twitter or Tumblr.

[TotH to Kottke]

* J. Maarten Troost


As we see stars, we might spare a thought for Daniel Kirkwood; he died on this date in 1895. Kirkwood’s most significant contribution came from his study of asteroid orbits. When arranging the then-growing number of discovered asteroids by their distance from the Sun, he noted several gaps, now named Kirkwood gaps in his honor, and associated these gaps with orbital resonances with the orbit of Jupiter.  Further, Kirkwood also suggested a similar dynamic was responsible for Cassini Division in Saturn’s rings, as the result of a resonance with one of Saturn’s moons.  In the same paper, he was the first to correctly posit that the material in meteor showers is cometary debris.

Kirkwood also identified a pattern relating the distances of the planets to their rotation periods, which was called Kirkwood’s Law. This discovery earned Kirkwood an international reputation among astronomers; he was dubbed “the American Kepler” by Sears Cook Walker, who claimed that Kirkwood’s Law proved the widely held Solar Nebula Theory.  (In the event, the “Law” has since become discredited as new measurements of planetary rotation periods have shown that the pattern doesn’t hold.)

Daniel_Kirkwood source


“I don’t feel like speculating about them. All I know is what appeared on the film which was developed after the flight.”*…



… The [British] Ministry of Defence ran a UFO desk from 1952 until 2009; it was as underfunded as its American cousins, but it collected as many sightings (12,000) and was a bit more tolerant. Many of the MoD reports were accompanied by illustrations – diagrams, photos, sketches, even paintings – that were duly filed away. When the Freedom of Information Act was passed in 2000, the UFO desk was inundated with requests. The MoD knew better than to put up a fight. They’d seen nothing definite in over fifty years, so from one point of view the files were too trivial to hide.

David Clarke, a lecturer in journalism at Sheffield Hallam University, was made a consultant at the National Archives, where he spent ten years overseeing the UFO files’ release. There may be no extraordinary revelations in them, in the sense a UFOlogist would like, but there are fruits of a different sort. Clarke recently curated a peculiar and beautiful book called UFO Drawings from the National Archives, a showcase of the best ‘imaginative artwork’ sent to the MoD, ranging from scribbled crayon disks to diagrams in tidy pencil.

The book takes an old question (what did these people see?), sidesteps the nutjob theories and gives us a form of social history…

Hop aboard at “The UFOs we want.”

* NASA pilot Joseph Walker (referring to objects seen while he was tracking and photographing X-15 tests)


As we scan the skies, we might recall that it was on this date in 1950 that the first rocket was launched from Cape Canaveral in Florida– the “Bumper 2,” a V-2 missile base topped with a WAC Corporal rocket.

cape canav source


Written by LW

July 24, 2018 at 1:01 am

“There is not a discovery in science, however revolutionary, however sparkling with insight, that does not arise out of what went before”*…


Analysis of an ancient codebreaking tablet has revealed that Babylonian astronomers had calculated the movements of Jupiter using an early form of geometric calculus some 1,400 years before we thought the technique was invented by the Europeans.

This means that these ancient Mesopotamian astronomers had not only figured out how to predict Jupiter’s paths more than 1,000 years before the first telescopes existed, but they were using mathematical techniques that would form the foundations of modern calculus as we now know it…

Look more closely at the foundations of modern calculus at “This ancient Babylonian map of Jupiter just changed history as we know it.”  And read the Science article reporting the findings here.

* Isaac Asimov


As we calculate the differential, we might send radiant birthday greetings to James Alfred Van Allen; he was born on this date in 1914.   A space scientist who learned to miniaturize electronics during World War II, he was instrumental in establishing the field of magnetospheric research in space, and led the scientific community for the inclusion of scientific research instruments on space satellites.  The Van Allen radiation belts were named after him, following their discovery by his Geiger–Müller tube instruments in 1958 on the Explorer 1, Explorer 3, and Pioneer 3 satellites during the International Geophysical Year.



Written by LW

September 7, 2016 at 1:01 am

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