Exploring the Cosmos - Degree Exam 2008 - Life and Death of Stars (Part 2)
1. A globular cluster in our Galaxy is
an asterism like the Pleiades.
a group of very old stars.
a group of very young stars.
a constellation such as Orion.
2. T Tauri stars are
frequently strong infrared sources.
standard candles.
remnant cores of dead stars.
optically visible in their cocoon.
3. The Chandrasekhar limit is
the maximum radius of a red giant.
around ten times the solar mass.
the radius of a black hole.
the maximum mass of a white dwarf.
4. Protostars
are most easily observed by the IR radiation emitted.
are stars with abnormally high proton content.
are Population I stars.
usually emit pulses observable in radio waves.
5. Stars on the lower left part of the main sequence on a HR diagram are
red giants.
white dwarfs.
red dwarfs.
blue giants.
6. The Crab Nebula is of interest because it
is in the centre of the constellation Cancer.
contains a pulsar.
surrounds the supernova SN1987A.
contains a black hole.
7. Red giants
look very large through a telescope.
have nuclear reactions in their interior.
are very hot.
are a stage in the life of our Sun.
8. The Pauli exclusion principle explains
supernovae.
why white dwarfs are stable.
why neutron stars collapse.
the solar neutrino problem.
9. Type I and II supernovae
will occur in stars more massive than the Sun.
are both standard candles.
can reoccur.
will occur in stars less massive than the Sun.
10. The final state of a star depends mainly on its
chemical composition.
mass.
degeneracy.
magnitude.
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