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  1. C

    astronomy H-R diagram question?

    which main sequence region would mass be transferred into energy at the greatest rate?
  2. C

    astronomy H-R diagram question?

    which main sequence region would mass be transferred into energy at the greatest rate?
  3. C

    astronomy question....?

    which of these elements had to be made in a supernova explosion? a. calcium b. uranium c. oxygen
  4. C

    mulit. choice astronomy?

    what would you be most likely to find if you returned to the solar system in 10 billion years? a. a neutron star b. a white dwarf c. a black hole
  5. C

    true or false astronomy Q?

    most of the supernova explosions that occur in a star cluster happen during its first 100 million years
  6. C

    mult. choice astronomy question?

    what happens within a contracting cloud in which gravity is stronger than pressure if its temperature remains the same as it contracts? a. it breaks into smaller fragments b. thermal pressure starts to push back more effectivly c. it traps all the energy released by gravitational contraction
  7. C

    true or false astronomy Q?

    some of the stars in a star culster live their entire lives and then die off before many of the clusters stars initiate fusion
  8. C

    true or false astronomy question?

    the current mass of a star is the same as the mass it had when it first became a protostar
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