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AST1002 Multiple Choice Test WithComplete Solution
1 arc second is equal to
1/60°.
1/360 of a full circle.
1/60 of a full circle.
1/3,600°. - ANSWER 1/3,600°.
According to Kirchhoff's laws, the continuous spectrum of light from a hot
star, after passing through a cool gas cloud,
is unaffected because atoms in the gas cloud are too cool to absorb or emit
energy.
is enhanced at infrared wavelengths by a continuous spectrum emitted by
the cool gas.
shows absorption features where light has been absorbed by the atoms of
the cool gas.
contains additional emission lines from energy emitted by the atoms of the
cool gas. - ANSWER shows absorption features where light has been
absorbed by the atoms of the cool gas.
An atom consists of:
,neutrons orbiting an electrically neutral nucleus composed of protons and
electrons.
positive protons, neutral neutrons, and negative electrons orbiting a small
but massive black hole.
negatively charged electrons and positively charged protons mixed uniformly
throughout the volume of the atom.
negatively charged electrons moving around a very small but massive,
positively charged nucleus. - ANSWER negatively charged electrons moving
around a very small but massive, positively charged nucleus.
Are the constellations seasonal?
Yes. As the year progresses, the constellations change their positions with
respect to each other, so every night brings a different mixture of summer
and winter constellations.
Yes. On a summer night many of the constellations you can see are different
from the constellations you can see on a winter night. But there are some
constellations you can see all year long.
Yes. On a summer night all the constellations you can see are different from
the constellations you can see on a winter night.
No. If you wait long enough, you can see all the constellations on any clear
night of the year. - ANSWER Yes. On a summer night many of the
constellations you can see are different from the constellations you can see
on a winter night. But there are some constellations you can see all year long.
,How much of the overall sky is north of the celestial equator?
more than one-half because of the precession of the poles
less than one-half because of the tilt of the equator to the ecliptic plane
all of it, by definition
exactly one-half - ANSWER exactly one-half
If a modern astronomer describes a faint star as being in the constellation
Cygnus, the Swan, you know that the star is
in a distant galaxy located in a particular direction from the Earth.
one of a set of stars that make up a particular "picture," in this case a swan,
in the sky.
somewhere within a particular region of sky having definite boundaries.
inside our solar system. - ANSWER somewhere within a particular region of
sky having definite boundaries.
If the mass of the Sun were doubled and Jupiter remained at its present
distance, the gravitational force the Sun exerted on Jupiter would
stay the same.
be 16 times its present value.
be twice its present value.
, be 4 times its present value. - ANSWER be twice its present value
If you face Polaris, the North Star, you are facing north;
west is to your right and east is to your left, whether you are in the northern
hemisphere or not.
east is to your right and west is to your left, whether you are in the northern
hemisphere or not.
east is to your right and west is to your left, but only if you are in the
northern hemisphere.
west is to your right and east is to your left, but only if you are in the
northern hemisphere. - ANSWER east is to your right and west is to your left,
whether you are in the northern hemisphere or not.
In modern astronomy, the constellations are
a small number of well-defined and separate groups of stars in our sky.
88 nonoverlapping sky regions, covering the whole sky.
specific patterns of stars that point to certain directions that are useful for
navigation.
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