Exploring the Cosmos - Degree Exam 2011 - Life and Death of Stars (Part 2)
1. Which of the following is Betelgeuse?
A star
A cluster
A nova
A constellation
2. The Hertzprung-Russell diagram relates which two properties of a star?
Time and temperature
Time and distance
Luminosity and time
Luminosity and temperature
3. The surface temperature of a type G2 star is about what?
5 800 K
58 000 K
820 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
Neutrons
Positrons
Neutrinos
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 no plateau.
no H-lines and no plateau.
H-lines and a plateau.
8. The Chandrasekhar limit is
the minimum mass of a black hole.
2.8 solar masses
caused by electrons being fermions.
due to boson degeneracy.
9. Neutron stars are approximately as dense as which of the following?
Water
The mass of the Earth squashed into a thimble.
The mass of the Sun squashed into the volume of the Earth.
A mountain squashed into a thimble.
10. Jocelyn Bell-Burnell discovered
black holes
supernovae
novae
pulsars
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