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PHYS1160-Introduction to Astronomy T3 2025
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The cosmic microwave background is almost perfectly uniform in all directions, except for very small deviations in its temperature. What do scientists think these small deviations represent?
Which of the following happened first (after the Big Bang)?
Suppose that the universe were infinite in both extent and age. In that case, we would expect the night sky to be
We measure the mass of the black hole at the galactic centre from
In which part of the Galaxy would you find the galactic black hole (Sagittarius A*)?
Which of these galaxies would you most likely find at the centre of a large cluster of galaxies?
In a photo like the Hubble eXtreme Deep Field, we see galaxies in many different stages of their lives. In general, which galaxies are seen in the earliest (youngest) stages of their lives?
The rate at which supernovae explode in a starburst galaxy that is forming stars 10 times as fast as the Milky Way is
Hubble's galaxy classification diagram (the 'tuning fork')
The most basic difference between elliptical galaxies and spiral galaxies is that