The Arecibo message, sent in 1974, was a binary-coded message toward a star cluster 25,000 light-years away.
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Dark energy is thought to drive the accelerating expansion of the universe.
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The observable universe is about 93 billion light‑years wide.
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The Earth's orbit around the Sun is slightly elliptical.
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The Great Attractor is a gravitational anomaly influencing the motion of galaxies.
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Venus has surface temperatures hot enough to melt lead.
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The Earth completes one full rotation approximately every 24 hours.
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The Earth's magnetic north pole moves over time.
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The Earth's atmosphere gradually fades into space.
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