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