Astronomers Summarize 15 Years‘ value of data from Sloan Digital Sky Survey into the An interactive map of the observable universe.
map Space horde included object, favorite A bright blue quasar and a red elliptical galaxy.can explore map here.
“Astrophysicists around the world have been analyzing this data for years, producing thousands of scientific papers and discoveries,” said Bryce Menard, an astrophysicist and cartographer at Johns Hopkins University. is connected to,” he said. release“But nobody took the time to create a map that was beautiful, scientifically accurate, and accessible to non-scientists. It’s about showing everyone what it looks like to be.”
Observation from Taken with a telescope in New Mexico There are about 200,000 galaxies, each with billions of stars, unknown world. The data contains more than the 200,000 objects shown, but if the researchers showed them all, The map becomes an unnavigable sea of dots.
In that sense the map simplification, bThe alternatives are simply overwhelming. The Milky Way—the 100,000-light-year-diameter galaxy we call home—is just one pixel of his at the bottom of the map.
Theoretically, the data underlying the map (and thus the map itself) could contain some of the estimated 40 quintillion odd black holes in the observable universe. Of course, a black hole’s gravity is too strong for light to escape. They do not appear as light sources on the map. But quasars, the cores of extremely bright galaxies, are powered by supermassive black holes at their centers. appear on the map.
“We are used to seeing astrophotographs showing one galaxy here, one galaxy over there, or perhaps a group of galaxies,” says Menard. “But this map shows a very different scale.”
Users can scroll up the map, essentially going back in time to see older, more redshifted objects. A ticker at the bottom of the map shows how far back the user has traveled at a given point in time.
Unfortunately, you can’t click on individual galaxies to figure out what they are (or where they are). Still, this map serves its purpose. To show how small and new it is. we compare with the history of the universe And all that cosmic content.