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.
a constellation such as Orion.
a group of very young stars.
an asterism like the Pleiades.
2. T Tauri stars are
remnant cores of dead stars.
frequently strong infrared sources.
optically visible in their cocoon.
standard candles.
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 Population I stars.
are stars with abnormally high proton content.
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.
blue giants.
red dwarfs.
white dwarfs.
6. The Crab Nebula is of interest because it
surrounds the supernova SN1987A.
contains a black hole.
is in the centre of the constellation Cancer.
contains a pulsar.
7. Red giants
look very large through a telescope.
are a stage in the life of our Sun.
have nuclear reactions in their interior.
are very hot.
8. The Pauli exclusion principle explains
why neutron stars collapse.
why white dwarfs are stable.
the solar neutrino problem.
supernovae.
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
degeneracy.
chemical composition.
mass.
magnitude.
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