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.
a group of very old stars.
an asterism like the Pleiades.
a group of very young stars.
2. T Tauri stars are
standard candles.
optically visible in their cocoon.
frequently strong infrared sources.
remnant cores of dead stars.
3. The Chandrasekhar limit is
the maximum radius of a red giant.
the radius of a black hole.
around ten times the solar mass.
the maximum mass of a white dwarf.
4. Protostars
are most easily observed by the IR radiation emitted.
usually emit pulses observable in radio waves.
are stars with abnormally high proton content.
are Population I stars.
5. Stars on the lower left part of the main sequence on a HR diagram are
red dwarfs.
red giants.
white dwarfs.
blue giants.
6. The Crab Nebula is of interest because it
contains a pulsar.
surrounds the supernova SN1987A.
is in the centre of the constellation Cancer.
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.
the solar neutrino problem.
supernovae.
why white dwarfs are stable.
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
mass.
magnitude.
chemical composition.
degeneracy.
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