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ASTR 1020 FINAL EXAM
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ASTR 1020 FINAL EXAM
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ASTR 1020 FINAL EXAMWhat is the Milky Way in the sky? - ANSWER The outline of the disk of our Galaxy
Where in the Galaxy are globular clusters located? - ANSWER Halo
Stars tend to form in the spiral arms of our Galaxy... - ANSWER Because the gas is
denser there
The objects found above and below the plane of our Galaxy are generally... -
ANSWER Older than disk objects
Which type of galaxy contains stars? - ANSWER All of them
Which type of galaxy forms through a merger? - ANSWER Elliptical
Which type of galaxy typically contains a lot of gas and dust? - ANSWER Irregular
and Spiral/Disk
A galaxy that has long "tails" reaching out into space is thought to be the result of... -
ANSWER The interaction or merger between two galaxies
The distance to nearby galaxies can be obtained from... - ANSWER Cepheid
variables
List of different structures in the Universe is arranged from largest to smallest scales
- ANSWER Walls and voids, super-cluster, galaxy cluster, galaxy, solar system
The energy emitted by active galaxies is believed to be from... - ANSWER Gas
falling into a super-massive black hole
The large Doppler red-shifts observed in the spectra of quasars indicates that they
are... - ANSWER Receding
The observed expansion of the Universe implies that in the past, the galaxies were...
- ANSWER Closer together
The assumption that all observers, no matter where their location in space, would
see the same large-scale picture of the universe is known as the ______ principle... -
ANSWER Cosmological
In the Standard Cosmological Model the Universe initially contained... - ANSWER
Only photons (light)
Neutron star created when? - ANSWER A high mass star dies
Nuclear fusion: - ANSWER Combining lightweight nuclei to make heavier nuclei
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