Exploring the Cosmos - Degree Exam 2011 - Life and Death of Stars (Part 2)
1. Which of the following is Betelgeuse?
A cluster
A constellation
A star
A nova
2. The Hertzprung-Russell diagram relates which two properties of a star?
Luminosity and time
Time and distance
Luminosity and temperature
Time and temperature
3. The surface temperature of a type G2 star is about what?
5 800 K
820 K
58 000 K
8 200 K
4. If the core temperature of a main sequence star increases, what happens to it?
The star shrinks and heats.
The star expands and heats.
The star shrinks and cools.
The star expands and cools.
5. Which of the following tends to escape the core of a star?
Neutrinos
Protons
Neutrons
Positrons
6. A planetary nebula is associated with which of the following?
Red giants
White dwarfs
Asteroids
Supernovae
7. The light curve of a type-II supernova has
no H-lines and a plateau.
H-lines and a plateau.
H-lines and no plateau.
no H-lines and no plateau.
8. The Chandrasekhar limit is
caused by electrons being fermions.
2.8 solar masses
due to boson degeneracy.
the minimum mass of a black hole.
9. Neutron stars are approximately as dense as which of the following?
The mass of the Sun squashed into the volume of the Earth.
The mass of the Earth squashed into a thimble.
Water
A mountain squashed into a thimble.
10. Jocelyn Bell-Burnell discovered
supernovae
novae
pulsars
black holes
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