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Redshift
Redshift is the phenomenon where light from distant galaxies is stretched to longer, redder wavelengths due to the expansion of the universe. It serves as a key observational evidence for the universe's ongoing expansion.
Source: science.nasa.gov
APODs including "Redshift"
HUDF Infrared: Dawn of the Galaxies
09/12/2009
JKCS041: The Farthest Galaxy Cluster Yet Measured
28/10/2009
CMBR Dipole: Speeding Through the Universe
06/09/2009
Lyman Alpha Blob
02/07/2009
GRB 090423: The Farthest Explosion Yet Measured
29/04/2009
Breaking Distant Light
04/01/2009
MACSJ0025: Two Giant Galaxy Clusters Collide
17/09/2008
CMBR Dipole: Speeding Through the Universe
09/03/2008
Abell 2218: A Galaxy Cluster Lens
10/02/2008
The Universe Nearby
11/12/2007
The Sloan Great Wall: Largest Known Structure?
07/11/2007
SN 2005ap: The Brightest Supernova Yet Found
16/10/2007
Building Galaxies in the Early Universe
10/09/2007
Time Tunnel
06/09/2007
Huge Void Implicated in Distant Universe
27/08/2007
CMBR Dipole: Speeding Through the Universe
08/10/2006
GRB 060218: A Mysterious Transient
27/02/2006
CMBR Dipole: Speeding Through the Universe
08/05/2005
Redshift 10: Evidence for a New Farthest Galaxy
17/03/2004
Galaxy Cluster Lenses Farthest Known Galaxy
17/02/2004
A Gamma Ray Burst - Supernova Connection
14/04/2003
COBE Dipole: Speeding Through the Universe
09/02/2003
The Lyman Alpha Forest
26/01/2003
The Galaxy and the Quasar
07/10/2002
Breaking Distant Light
19/03/2002
The Cosmic Infrared Background
06/02/2002
Finding Dark Matter
19/12/2001
Abell 2218: A Galaxy Cluster Lens
07/10/2001
2dF Sees Waves of Galaxies
04/09/2001
A GRB 000301C Symphony
03/06/2001