In 1977, a strong narrowband radio signal known as the 'Wow! signal' was detected from space.
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Neutron stars are so dense that a single teaspoon would weigh billions of tons on Earth.
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Time moves slower in stronger gravitational fields.
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The Sun accounts for more than 99% of the mass of our solar system.
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A teaspoon of neutron star material would weigh billions of tons.
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Cosmic microwave background radiation is evidence of the early universe.
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The light you see from some stars today began traveling before humans existed.
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Neptune is the farthest known major planet from the Sun.
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The observable universe is about 93 billion light‑years wide.
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