Mar 31, 2025
The universe is expanding at an accelerating rate due to dark energy. Some distant galaxies move away from us faster than the speed of light, making them unreachable forever, even if we travel at light speed.
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Venus has an extremely slow rotation. It takes 243 Earth days to complete one rotation on its axis but only 225 Earth days to orbit the Sun, meaning a day on Venus is longer than its year.
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Neutron stars are the remnants of massive stars after supernova explosions. A single teaspoon of neutron star material would weigh about four billion tonnes, more than all the cars on Earth combined.
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Black holes have gravitational pulls so strong that they distort time. Near their event horizon, time slows dramatically. If you watched someone fall in, they would appear frozen in time from your perspective.
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The Hercules-Corona Borealis Great Wall is a galactic superstructure spanning 10 billion light-years. Its immense size challenges the cosmological principle, which states that matter should be evenly distributed.
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Sagittarius B2, a massive molecular cloud near the Milky Way's centre, contains vast amounts of ethyl alcohol. While not drinkable, it holds enough alcohol to produce 400 trillion trillion pints of beer.
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Ordinary matter, including all stars, planets, and galaxies, accounts for only about 5% of the universe. The rest is dark matter and dark energy, invisible forces that shape cosmic structures but remain mysterious.
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55 Cancri e, a planet twice the size of Earth, is believed to be composed largely of carbon and could contain vast amounts of diamond due to its extreme pressure and temperature conditions.
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The Boomerang Nebula is the coldest known natural location, with temperatures plunging to -272°C, just one degree above absolute zero. It’s even colder than the background radiation of space itself.
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The Moon is moving 3.8 cm away from Earth every year due to tidal interactions. In about 600 million years, total solar eclipses will no longer occur because the Moon will appear too small to fully cover the Sun.
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