1|Page
ASTRO 1-EXAM 3, 2026/2027 ACTUAL
COMPREHENSIVE FREQUENTLY TESTED
QUESTIONS AND VERIFIED |ANSWERS/100%
ACCURATE ANSWERS|ALREADY GRADED A+ /
BRAND NEW!!!
which of the following is true: - Answer-B. red main
sequence stars are less luminous than blue main
sequence stars
Explain how a white dwarf's observable properties
(specifically Luminosity & Temp) change over billions of
years if it is left alone, and show how its location would
change on an H-R diagram. - Answer-•White Dwarfs are
low-mass stars, and if they are left alone, they will fade
and cool forever.
•If mass transfer adds mass to a White Dwarf, it can
become, (1) a Nova, or (2) a Supernova
Compared to a white dwarf, a neutron star's density is? -
Answer-•Not all neutron stars are called pulsars because
not all neutron stars send this signal in a direction that
astronomers can detect them.
Which statement is necessarily true?
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A. Every pulsar is a neutron
star
B. Every neutron star is a
pulsar
C. both - Answer-A. Every pulsar is a neutron
star
Compared to a neutron star, a black hole's density is? -
Answer-
If our Sun were suddenly compressed to a black hole (BH)
of the Sun's same mass, Earth would... - Answer-maintain
the same orbit
What happens to as you get closer and closer to the
center of a black hole (BH)? - Answer-It increases without
bound
How long does it take light to travel from the center of our
galaxy to us? - Answer-25,000 years
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About how far are we (the Sun & our solar system) from
the center of the galaxy? - Answer-25,000ly
If you observe two galaxies at different distances from you
(2 billion ly and 6 billion ly), the more distant one will -
Answer-appear younger.
If a distant galaxy is 2x10^3 Mpc away, how fast is it
receding from us? (use H0 = 70 km/s/Mpc) - Answer-
1.4x105 km/s
If a galaxy were receding from us at 3x10^5 km/s*, how far
away would it be?
(use H0 = 70 km/s/Mpc) - Answer-3/7 x 10^4 Mpc
Imagine that you are in Galaxy 1 and you observe that
both Galaxies 2 and 3 are moving away from you.
what is the heaviest chemical element produced in the
core of any star? - Answer-A. Iron
In the Sun, the proton-proton chain makes 4He, the
dominant form of helium. 4He has - Answer-D. two protons
ASTRO 1-EXAM 3, 2026/2027 ACTUAL
COMPREHENSIVE FREQUENTLY TESTED
QUESTIONS AND VERIFIED |ANSWERS/100%
ACCURATE ANSWERS|ALREADY GRADED A+ /
BRAND NEW!!!
which of the following is true: - Answer-B. red main
sequence stars are less luminous than blue main
sequence stars
Explain how a white dwarf's observable properties
(specifically Luminosity & Temp) change over billions of
years if it is left alone, and show how its location would
change on an H-R diagram. - Answer-•White Dwarfs are
low-mass stars, and if they are left alone, they will fade
and cool forever.
•If mass transfer adds mass to a White Dwarf, it can
become, (1) a Nova, or (2) a Supernova
Compared to a white dwarf, a neutron star's density is? -
Answer-•Not all neutron stars are called pulsars because
not all neutron stars send this signal in a direction that
astronomers can detect them.
Which statement is necessarily true?
,2|Page
A. Every pulsar is a neutron
star
B. Every neutron star is a
pulsar
C. both - Answer-A. Every pulsar is a neutron
star
Compared to a neutron star, a black hole's density is? -
Answer-
If our Sun were suddenly compressed to a black hole (BH)
of the Sun's same mass, Earth would... - Answer-maintain
the same orbit
What happens to as you get closer and closer to the
center of a black hole (BH)? - Answer-It increases without
bound
How long does it take light to travel from the center of our
galaxy to us? - Answer-25,000 years
, 3|Page
About how far are we (the Sun & our solar system) from
the center of the galaxy? - Answer-25,000ly
If you observe two galaxies at different distances from you
(2 billion ly and 6 billion ly), the more distant one will -
Answer-appear younger.
If a distant galaxy is 2x10^3 Mpc away, how fast is it
receding from us? (use H0 = 70 km/s/Mpc) - Answer-
1.4x105 km/s
If a galaxy were receding from us at 3x10^5 km/s*, how far
away would it be?
(use H0 = 70 km/s/Mpc) - Answer-3/7 x 10^4 Mpc
Imagine that you are in Galaxy 1 and you observe that
both Galaxies 2 and 3 are moving away from you.
what is the heaviest chemical element produced in the
core of any star? - Answer-A. Iron
In the Sun, the proton-proton chain makes 4He, the
dominant form of helium. 4He has - Answer-D. two protons
