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
remnant cores of dead stars.
frequently strong infrared sources.
standard candles.
optically visible in their cocoon.
3. The Chandrasekhar limit is
around ten times the solar mass.
the maximum mass of a white dwarf.
the maximum radius of a red giant.
the radius of a black hole.
4. Protostars
usually emit pulses observable in radio waves.
are most easily observed by the IR radiation emitted.
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.
white dwarfs.
red giants.
blue giants.
6. The Crab Nebula is of interest because it
contains a pulsar.
contains a black hole.
surrounds the supernova SN1987A.
is in the centre of the constellation Cancer.
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 white dwarfs are stable.
supernovae.
why neutron stars collapse.
the solar neutrino problem.
9. Type I and II supernovae
are both standard candles.
will occur in stars more massive than the Sun.
can reoccur.
will occur in stars less massive than the Sun.
10. The final state of a star depends mainly on its
chemical composition.
mass.
magnitude.
degeneracy.
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