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 cluster
A nova
2. The Hertzprung-Russell diagram relates which two properties of a star?
Luminosity and time
Time and distance
Time and temperature
Luminosity and temperature
3. The surface temperature of a type G2 star is about what?
8 200 K
5 800 K
820 K
58 000 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 cools.
The star expands and heats.
The star shrinks 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?
Supernovae
White dwarfs
Asteroids
Red giants
7. The light curve of a type-II supernova has
no H-lines and a plateau.
H-lines and no plateau.
H-lines and a plateau.
no H-lines and no plateau.
8. The Chandrasekhar limit is
the minimum mass of a black hole.
due to boson degeneracy.
caused by electrons being fermions.
2.8 solar masses
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
black holes
novae
supernovae
pulsars
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