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Астронет: Астрономическая картинка дня Полёт сквозь Вселенную http://variable-stars.ru/db/msg/1268892/eng |
Credit & Copyright: M. A. AragСn
(JHU),
M. SubbaRao
(Adler),
A. Szalay
(JHU),
Y. Yao (LBN,
NERSC),
and the
SDSS-III Collaboration
Explanation:
What would it be like to fly through the universe?
Possibly the best simulated video of this yet has been composed from
recently-released galaxy data from the
Sloan Digital Sky
Survey.
Every spot in the
above video is a galaxy
containing billions of stars.
Many galaxies
are part of
huge clusters,
long filaments, or
small groups, while
expansive voids
nearly absent of galaxies also exist.
The movie starts by flying right through a large nearby cluster of galaxies
and later circles the SDSS-captured universe at about 2 billion light years
(a redshift
of about 0.15) from Earth.
Analyses of
galaxy positions and movements continues to bolster the
case that
our universe contains
not only the bright matter seen, like galaxies, but also a significant amount of
unseen
dark matter and
dark energy.
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.