Neutron stars can spin at a rate of 600 rotations per second
Space is completely silent
There is an uncountable number of stars in the known universe
The Apollo astronauts' footprints on the moon will probably stay there for at least 100 million years
99 percent of our solar system's mass is the sun
More energy from the sun hits Earth every hour than the planet uses in a year
If two pieces of the same type of metal touch in space, they will bond and be permanently stuck together
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