Astronomy Picture of the Day
    


APOD: 2023 July 5 ┴ A Map of the Observable Universe
<< Yesterday 4.07.2023 Tomorrow >>
APOD: 2023 July 5 ┴ A Map of the Observable Universe
Credit & Copyright: B. M÷nard & N. Shtarkman; Data: SDSS, Planck, JHU, Sloan, NASA, ESA
Explanation: What if you could see out to the edge of the observable universe? You would see galaxies, galaxies, galaxies, and then, well, quasars, which are the bright centers of distant galaxies. To expand understanding of the very largest scales that humanity can see, a map of the galaxies and quasars found by the Sloan Digital Sky Survey from 2000 to 2020 -- out to near the edge of the observable universe -- has been composed. Featured here, one wedge from this survey encompasses about 200,000 galaxies and quasars out beyond a look-back time of 12 billion years and cosmological redshift 5. Almost every dot in the nearby lower part of the illustration represents a galaxy, with redness indicating increasing redshift and distance. Similarly, almost every dot on the upper part represents a distant quasar, with blue-shaded dots being closer than red. Clearly shown among many discoveries, gravity between galaxies has caused the nearby universe to condense and become increasingly more filamentary than the distant universe.

More Detailed Maps: Related to Today's APOD

January
February
March
April
May
June
July
August
September
October
November
December
 < July 2023  >
Mo Tu We Th Fr Sa Su





12
3456789
10111213141516
17181920212223
24252627282930
31





Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (USRA)
NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.

Based on Astronomy Picture Of the Day

Publications with keywords: universe
Publications with words: universe
See also:
All publications on this topic >>