Exploring the Cosmos - Degree Exam 2008 - Life and Death of Stars (Part 2)
1. A globular cluster in our Galaxy is
a group of very old stars.
an asterism like the Pleiades.
a group of very young stars.
a constellation such as Orion.
2. T Tauri stars are
frequently strong infrared sources.
standard candles.
optically visible in their cocoon.
remnant cores of dead stars.
3. The Chandrasekhar limit is
around ten times the solar mass.
the maximum radius of a red giant.
the maximum mass of a white dwarf.
the radius of a black hole.
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
blue giants.
red giants.
red dwarfs.
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
have nuclear reactions in their interior.
are a stage in the life of our Sun.
are very hot.
look very large through a telescope.
8. The Pauli exclusion principle explains
the solar neutrino problem.
supernovae.
why neutron stars collapse.
why white dwarfs are stable.
9. Type I and II supernovae
can reoccur.
will occur in stars more massive than the Sun.
will occur in stars less massive than the Sun.
are both standard candles.
10. The final state of a star depends mainly on its
degeneracy.
magnitude.
mass.
chemical composition.
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