A Cluster Too Far
Explanation:
Why is this galaxy cluster so red? Nearby
clusters have
galaxies with colors that are much more yellow and blue.
A leading explanation is that this
cluster of galaxies
lies so far across
our universe (z~1) that cosmological
time dilation significantly reddens the light.
If true, this cluster might lie
too far
away to have formed in a dense universe,
implying that our universe is not very dense.
HST 035528+09435 is one of the reddest clusters found in the
Hubble Space Telescope's
Medium Deep Survey.
Astronomers will now work to confirm
the high distance to
this cluster,
and contemplate what it signifies about the
nature of our universe.
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.
