The table below contains observational data for two nearby spiral galaxies.
| Galaxy | Redshift, zzz | Distance from Earth / ly\text{ly}ly |
|---|---|---|
| NGC 2903 | 3.8×10−33.8 \times 10^{-3}3.8×10−3 | 5.3×1075.3 \times 10^75.3×107 |
| NGC 3351 | 1.8×10−31.8 \times 10^{-3}1.8×10−3 | 2.7×1072.7 \times 10^72.7×107 |
Discuss whether these data are consistent with Hubble’s Law.
Very distant primordial galaxies are observed at high redshifts. Discuss one difficulty in using standard candles (such as Type Ia supernovae) to determine the distance from the Earth to these extremely distant galaxies.
