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
Image & info via APOD
Image Credit & Copyright: B. Ménard & N. Shtarkman; Data: SDSS, Planck, JHU, Sloan, NASA, ESA
Source: A
Map of the Observable Universe – Scents of Science (myfusimotors.com)
No comments:
Post a Comment