1|Page
ASTRO 7N final Exam 2025/2026 QUESTIONS AND
100% DETAILED CORRECT ANSWERS
In the p-p chain, shown in the above diagram, what
particles must be input in order to produce one 4HE
nucleus? - ANSWER-6 protons, but 2 of them are returned
when the 4 HE is produced
What is the name of the slightly cooler layer of the sun just
outside the photosphere - ANSWER-chromosphere
How does a star move on the H-R diagram during the
period of time it is converting hydrogen to helium in its
core - ANSWER-it remains nearly fixed at a certain point
on the main sequence and does not move on the H-R
diagram
, 2|Page
If the entire mass of earth were concentrated in a region
the size of a marble, the resulting object would be -
ANSWER-a black hole
What is the smallest object - ANSWER-a neutron star
A galaxy has an H-alpha emission line observed at a
wavelength 10 percent larger than the rest wavelength of
H-alpha. What is the redshift of the galaxy? - ANSWER-
0.1
What is in this image? - ANSWER-supernova remnant
ASTRO 7N final Exam 2025/2026 QUESTIONS AND
100% DETAILED CORRECT ANSWERS
In the p-p chain, shown in the above diagram, what
particles must be input in order to produce one 4HE
nucleus? - ANSWER-6 protons, but 2 of them are returned
when the 4 HE is produced
What is the name of the slightly cooler layer of the sun just
outside the photosphere - ANSWER-chromosphere
How does a star move on the H-R diagram during the
period of time it is converting hydrogen to helium in its
core - ANSWER-it remains nearly fixed at a certain point
on the main sequence and does not move on the H-R
diagram
, 2|Page
If the entire mass of earth were concentrated in a region
the size of a marble, the resulting object would be -
ANSWER-a black hole
What is the smallest object - ANSWER-a neutron star
A galaxy has an H-alpha emission line observed at a
wavelength 10 percent larger than the rest wavelength of
H-alpha. What is the redshift of the galaxy? - ANSWER-
0.1
What is in this image? - ANSWER-supernova remnant
