Neutron stars are so dense a teaspoon would weigh a billion tonnes
A neutron star packs more mass than the Sun into a ball about 20 km across. Its surface gravity is around 100 billion times Earth’s.
More space facts
See all →Sunlight takes about 8 minutes to reach you
Light leaves the Sun’s surface and crosses 150 million km to Earth in roughly 8 minutes 20 seconds. The light you see from the Sun is always slightly old news.
Read the fact →The footprints on the Moon will last millions of years
The Moon has no wind, water or weather to wear them away. Apollo boot prints from 1969 are still crisp; only slow micrometeorite rain will eventually erase them.
Read the fact →It rains diamonds on Neptune and Uranus
Deep in their atmospheres, extreme pressure squeezes carbon from methane into diamond crystals, which sink slowly towards the core — a diamond rain, confirmed in lab experiments.
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