6/ Galactic Evolution
When we look at galaxies billions of light-years away, we’re seeing them as they were billions of years ago. They look younger and less developed, showing how the universe has evolved over time.
When we look at galaxies billions of light-years away, we’re seeing them as they were billions of years ago. They look younger and less developed, showing how the universe has evolved over time.
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1. Galaxies are moving away (Hubble’s law).
2. Light from galaxies is redshifted.
3. The CMB confirms the universe once was much hotter and denser.
If the universe is expanding, it must have been smaller and denser in the past. By tracing this backward, scientists concluded it all began from a single point: the Big Bang.
Pictures below are all real from #JWB
#BigBang #Cosmology #Space