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