Physics
Look inside a giant supernova that seeded the universe
Some of the very massive stars that populated the early universe exploded completely, sowing the seeds of future stars, solar systems and galaxies
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Some of the very massive stars that populated the early universe exploded completely, sowing the seeds of future stars, solar systems and galaxies
We need to feel a certain gravitational force to tell up from down, which has big implications for the design of objects for bases on other planets