Chapter 12 Quiz AST 1002
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School
Indian River State College *
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Course
1002
Subject
Astronomy
Date
Dec 6, 2023
Type
Pages
3
Uploaded by BrigadierResolveWhale40
This astronomer catalogued the spectral classes of stars: O, B, A, F, G, K, M.
Cannon
What kind of star is Rigel?
blue giant
Ad
From the diagram above what is the designation of Betelgeuse?
Red Giant
According to the diagram above, what kind of star is Barnard's Star?
red dwarf
According to the diagram, what kind of star is Sirius B?
white dwarf
According to the diagram, what is the sun's spectral class?
G
According to the diagram, where on the main sequence are the brightest, hottest stars?
upper left
If Jupiter is 500 million miles from the sun and Saturn is 1 billion miles from the sun, how much
sunlight does Saturn get compared to Jupiter?
Saturn gets one-fourth the light that Jupiter gets.
If the stars Sirius and Luyten 726-8A are the same distance away, but Sirius has an apparent
magnitude of -1.46 and Luyten 726-8A has an apparent magnitude of 12.54, then -
Sirius' absolute magnitude is much greater than Luyten 726 -8A's.
If the sun were 10 parsecs away,...
you could see the sun, but it would be faint, around 5th magnitude.
The ring- or bubble-shaped shell of gas ejected slowly by a giant star is known as a -
planetary nebula.
Jocelyn Bell discovered this super-dense star, which sends out pulses of electromagnetic
energy:
pulsar
Scientific term for a white dwarf that periodically erupts and brightens due to mass-transfer
from a companion:
nova
A type 1 supernova results from -
a white dwarf star that pulls too much material off a companion star, putting its mass over the
threshold.
When the sun dies,
all of the preceeding.
Rapidly rotating neutron stars are also known as -
pulsars.
The disc-like whirlpool of matter that collects around a white dwarf or a black hole:
accretion disc
Cygnus X-1 has a mass 8 times that of the sun. Given an S radius = 3km/solar mass, what is its
Schwarzschild radius?
24 km
This is the point of no return for a black hole, where even light cannot escape:
the event horizon
The most recent supernova visible to the naked eye occurred in the year ____ in the _____.
1987; Large Magellanic Cloud
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