edwin hubble
DESCRIPTION
Edwin Hubble. Distance vs. velocity (away from us) for a bunch of galaxies. Velocity (kilometers per second). Distance (megaparsecs). NASA StarChild http://starchild.gsfc.nasa.gov/docs/StarChild/questions/redshift.html. Hubble’s Law. Velocity (kilometers per second). Distance (megaparsecs). - PowerPoint PPT PresentationTRANSCRIPT
Edwin Hubble
Distance vs. velocity (away from us)
for a bunch of galaxies
NASA StarChildhttp://starchild.gsfc.nasa.gov/docs/StarChild/questions/redshift.html
Distance (megaparsecs)
Velo
city
(ki
lom
eter
s pe
r se
cond
)
Hubble’s Law
NASA StarChildhttp://starchild.gsfc.nasa.gov/docs/StarChild/questions/redshift.html
Distance (megaparsecs)
Velo
city
(ki
lom
eter
s pe
r se
cond
)
Hubble’s Law (modern data)
Freedman et al. (2001), The Astrophysical Journal 553, 47
Type Ia Supernova
e
(Knop et al. 2003)
Redshift (amount universe “stretched” since the object’s light was emitted)
How
fain
t eac
h ob
ject
app
ears
(whe
n vi
ewed
from
Ea
rth)
≈ Velocity
≈ Dis
tanc
e
Type Ia Supernovae (Riess et al. 2004)
Redshift (amount universe “stretched” since the object’s light was emitted)
How
fain
t eac
h ob
ject
app
ears
(whe
n vi
ewed
from
Ea
rth)
The Cosmic Microwave Background
NASA/WMAP Science Team
The Cosmic Microwave Background
NASA/WMAP Science Team
The Cosmic Microwave Background
NASA/WMAP Science Team