lifetimes

  • phys.org | 4/17/2017 | Staff
    Astronomers can roughly estimate how long it takes for a new star to form: it is the time it takes for material in a gas cloud to collapse in free-fall, and is set by the mass, the size of the...
    569 views moemajor
  • Blank Discussion Topic
    Editorial | 1/1/1970 | Staff
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