Mercury has water ice in permanently shadowed craters despite being the closest planet to the Sun.
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The heliosphere protects the solar system from interstellar radiation.
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In 1977, a mysterious signal known as the 'Wow! signal' was detected from space.
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A day on Venus is longer than its year.
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The Earth orbits the Sun once every year.
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Neutron stars can collide and produce heavy elements.
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Jupiter is the largest planet in the solar system.
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Neutron stars are so dense that a single teaspoon would weigh billions of tons on Earth.
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The light you see from some stars today began traveling before humans existed.
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