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