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How is it possible that life cycles of stars are so well understood and tested, even though theycan take billions of years to happen?
Q3: Interstellar reddening of starlight occurs because the
Q3: Using an orbit size of 8 kpc,and
Q4: Astronomers think most galaxy interactions took place
Q7: The Earth lies close to the center
Q14: The Hipparcos mission's observations have given us
Q65: Eventually,all low mass stars will become white,then
Q70: As a 4-10 solar mass star leaves
Q76: The energy from the accretion disk around
Q103: If a star has a parallax of
Q113: The observed slowing of a clock in