Exploring the Cosmos - Degree Exam 2011 - Life and Death of Stars (Part 2)
1. Which of the following is Betelgeuse?
A constellation
A nova
A cluster
A star
2. The Hertzprung-Russell diagram relates which two properties of a star?
Time and temperature
Luminosity and time
Luminosity and temperature
Time and distance
3. The surface temperature of a type G2 star is about what?
820 K
58 000 K
5 800 K
8 200 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 cools.
The star expands and heats.
5. Which of the following tends to escape the core of a star?
Protons
Neutrinos
Neutrons
Positrons
6. A planetary nebula is associated with which of the following?
Supernovae
White dwarfs
Red giants
Asteroids
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
due to boson degeneracy.
2.8 solar masses
caused by electrons being fermions.
the minimum mass of a black hole.
9. Neutron stars are approximately as dense as which of the following?
The mass of the Earth squashed into a thimble.
Water
A mountain squashed into a thimble.
The mass of the Sun squashed into the volume of the Earth.
10. Jocelyn Bell-Burnell discovered
supernovae
novae
black holes
pulsars
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