Space & Cosmos
Mind-blowing facts about our universe, from quantum physics to galactic phenomena.
Did You Know?
The smallest known star is about the size of Saturn.
EBLM J0555-57Ab is just slightly bigger than Saturn, making it the smallest known star capable of sustaining nuclear...
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There’s a moon with higher surface gravity than Mercury.
Jupiter's moon Io has higher surface gravity than Mercury despite being much smaller, due to its high density...
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There’s a star that’s almost as old as the universe.
HD 140283, nicknamed the Methuselah star, is estimated to be 14.5 billion years old (which actually conflicts with...
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The most magnetic object known is a special type of neutron star.
Magnetars are neutron stars with magnetic fields so powerful they could wipe a credit card's data from halfway...
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The most reflective planet in the solar system is Venus.
Venus reflects about 70% of the sunlight that reaches it, thanks to its thick cloud cover of sulfuric...
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Some exoplanets orbit around dead stars.
Several planets have been discovered orbiting pulsars, the incredibly dense remnants of exploded stars. The first confirmed exoplanets...
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There’s a Saturn-like planet that floats freely through space without a star.
PSO J318.5-22 is a gas giant planet that doesn't orbit any star. It floats freely through space, likely...
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There is a black hole in the center of most galaxies.
Most, if not all, large galaxies have a supermassive black hole at their center. The one at the...
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Some stars create sound waves too deep for human ears to hear.
Stars produce sound waves through their turbulent convection, but the frequencies are typically far too low for humans...