LATEST ASTR 1020 EXAM / ASTR 1020 ACTUAL FINAL
EXAM NEWEST 2024-2025 COMPLETE REAL QUESTIONS
AND CORRECT DETAILED ANSWERS (100% CORRECT
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An elliptical galaxy may appear round if - Answer-it has one axis
shorter than the other two but is viewed parallel to the short
axis, all three axes are the same; it is spherical in shape, all
three axes are different lengths, but it is viewed from a special
angle, and it is elongated along one axis, but it is viewed
parallel to the long axis.
When viewed edge on, a spiral galaxy often - Answer-has a dark
line across the middle
Hubble's law was discovered using measurements of two
properties of a galaxy: - Answer-distance and recession velocity
Which plot most closely matches the observed rotation curve
of spiral galaxies? - Answer-Increase peak then levels out
,Astronomers know that dark matter is present in galactic halos
because the speeds of orbiting stars _________ far from the
center of the galaxy. - Answer-remain about contant
What contributes the largest percentage of total mass of a
spiral galaxy? - Answer-dark matter
All the light in an AGN outburst is emitted - Answer-At the same
time
All the light in an AGN outburst travels - Answer-at the same
speed
An observer finds out about an AGN outburst when - Answer-
light emitted from the closest part of the AGN arrives
The length of time that it takes for the light from the outburst
to pass the observer indicates - Answer-the size of the AGN
Given that Shapley calculated the size of the Milky Way based
on the stars' apparent brightness, how did not including the
effects of gas and dust affect Shapley's calculation? - Answer-
, The distance calculated to each globular cluster was too large,
and thus his size for the Milky Way was too large.
Study the distribution and ages of stars in the figure, and use
your observations to determine which of the following
statements are correct.
Choose one or more:
A. New stars are currently being born throughout the entire
galaxy.
B. The thin disk of our galaxy formed at the same time as the
bulge.
C. The cloud of gas from which our galaxy formed was originally
spheroidal in shape.
D. Globular clusters formed before the gas from which our
galaxy formed had time to collapse into a disk. - Answer-C & D
Lowest metalicity to highest
bulge, thin disk, halo - Answer-Halo
Bulge
Thin disk
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