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 mass of a white dwarf.
around ten times the solar mass.
the radius of a black hole.
the maximum radius of a red giant.
4. Protostars
are stars with abnormally high proton content.
are most easily observed by the IR radiation emitted.
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
white dwarfs.
red dwarfs.
red giants.
blue giants.
6. The Crab Nebula is of interest because it
contains a black hole.
surrounds the supernova SN1987A.
is in the centre of the constellation Cancer.
contains a pulsar.
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 neutron stars collapse.
the solar neutrino problem.
why white dwarfs are stable.
9. Type I and II supernovae
will occur in stars more massive than the Sun.
are both standard candles.
will occur in stars less massive than the Sun.
can reoccur.
10. The final state of a star depends mainly on its
mass.
magnitude.
degeneracy.
chemical composition.
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