Name all the things in space in 20 minÂutes. ImposÂsiÂble, you say? Well, if there’s anyÂone who might come close to sumÂmaÂrizÂing the conÂtents of the uniÂverse in less than half an hour, with the aid of a handy infoÂgraphÂic map also availÂable as a poster, it’s physiÂcist Dominic WalÂliÂman, who has explored othÂer vast sciÂenÂtifÂic regions in conÂdensed, yet comÂpreÂhenÂsive maps on physics, mathÂeÂmatÂics, chemÂistry, biolÂoÂgy, and comÂputÂer sciÂence.
These are all acaÂdÂeÂmÂic disÂciÂplines with more or less defined boundÂaries. But space? It’s potenÂtialÂly endÂless, a point WalÂliÂman grants up front. Space is “infiÂniteÂly big and there are an infiÂnite numÂber of things in it,” he says. HowÂevÂer, these things can still be named and catÂeÂgoÂrized, since “there are not an infiÂnite numÂber of difÂferÂent kinds of things.” We begin at home, so to speak, with the Earth, our Sun, the solar sysÂtem (and a dog), and the planÂets: terÂresÂtriÂal, gas, and ice giant.
AsterÂoids, meteÂors, comets, dwarf planÂets, moons, the Kuyper Belt, Dort Cloud, and heliosÂphere, cosÂmic dust, black holes…. We’re only two minÂutes in and that’s a lot of things already—but it’s also a lot of kinds of things, and those kinds repeat over and over. The superÂmasÂsive black hole at the cenÂter of the Milky Way may be a type repÂreÂsentÂing a whole class of things “at the cenÂter of every galaxy.”
The uniÂverse might conÂtain an infiÂnite numÂber of stars—or a numÂber so large it might as well be infiÂnite. But that doesn’t mean we can’t extrapÂoÂlate from the comÂparÂaÂtiveÂly tiny numÂber we’re able to observe as repÂreÂsenÂtaÂtive of genÂerÂal star behavÂior: from the “main sequence stars”—Red, Orange, and YelÂlow Dwarves (like our sun)—to blue giants to variÂable stars, which pulÂsate and change in size and brightÂness.
MasÂsive Red Giants explode into nebÂuÂlae at the end of their 100 milÂlion to 2 bilÂlion year lives. They also, along with Red and Orange Dwarf stars, leave behind a core known as a White Dwarf, which will become a Black Dwarf, which does not exist yet because the uniÂverse it not old enough to have proÂduced any. “White dwarves,” WalÂliÂman says, “will be the fate of 97% of the stars in the uniÂverse.” The numÂber of kinds of stars expands, we get into the difÂferÂent shapes galaxÂies can take, and learn about cosÂmic radiÂaÂtion and “mysÂterÂies.”
This project does not have the scope to include explaÂnaÂtions of how we know about these many kinds of space objects, but WalÂliÂman does an excelÂlent job of turnÂing what may be the biggest picÂture imagÂinÂable into a thumbnail—or poster-sized (purÂchase here, downÂload here)—outÂline of the uniÂverse. We canÂnot ask more from a twenÂty-minute video promisÂing to name “Every Kind of Thing in Space.”
See othÂer sciÂence-definÂing video maps, all writÂten, researched, aniÂmatÂed, editÂed, and scored by WalÂliÂman, at the links below.
RelatÂed ConÂtent:
The Map of Physics: AniÂmaÂtion Shows How All the DifÂferÂent Fields in Physics Fit TogethÂer
Josh Jones is a writer and musiÂcian based in Durham, NC. FolÂlow him at @jdmagness
What a wonÂderÂful explaÂnaÂtion of the space in which we exist. AND
easy enough for me to underÂstand!!!! It is amazÂing that we exist at all!
Thank you for your great artiÂcles!