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

The largest asteroid in our solar system is a mammoth piece of space rock named Ceres

One day on Venus is longer than one year on Earth

Jupiter's Red Spot is shrinking