Thirty Cosmos Facts That Will Blow Your Mind

BuzzFeed’s list of 30 mind-blowing space facts spans the cosmos—from the observable universe’s staggering scale (about one septillion stars) and a universe dominated by dark energy and dark matter to eye-opening specifics like Venus’s day lasting longer than its year, Saturn’s ultra-low density (it would float in water), Olympus Mons dwarfing Earth’s tallest mountain, and the Moon’s regolith preserving footprints for up to 100 million years. It also covers neutron stars’ immense density, interstellar visitors like Oumuamua and Borisov, a giant reservoir of water 12 billion light-years away, blue sunsets on Mars, and even the Sun’s hypothetical roar in space.