A self-updating guide to the universe: a new hidden space fact every day, plus live rocket launches, asteroid flybys, and NASA’s picture of the day.https://7b672732.space-site-80d.pages.dev/https://7b672732.space-site-80d.pages.dev/facts/bootes-void/https://7b672732.space-site-80d.pages.dev/facts/bootes-void/A region that should contain tens of thousands of galaxies holds barely 60. If the Milky Way sat at its center, we wouldn't have known other galaxies existed.Tue, 07 Jul 2026 00:00:00 GMThttps://7b672732.space-site-80d.pages.dev/facts/mercury-is-shrinking/https://7b672732.space-site-80d.pages.dev/facts/mercury-is-shrinking/As its giant iron core cools, Mercury contracts, wrinkling its crust into cliffs hundreds of kilometers long. The planet has lost up to 14 km of diameter.Mon, 06 Jul 2026 00:00:00 GMThttps://7b672732.space-site-80d.pages.dev/facts/europa-hidden-ocean/https://7b672732.space-site-80d.pages.dev/facts/europa-hidden-ocean/Beneath Europa's frozen shell sloshes a salty ocean up to 150 km deep — kept liquid for billions of years and considered the best place to look for alien life.Sun, 05 Jul 2026 00:00:00 GMThttps://7b672732.space-site-80d.pages.dev/facts/apollo-11-computer/https://7b672732.space-site-80d.pages.dev/facts/apollo-11-computer/The Apollo Guidance Computer had 4KB of RAM and less power than a musical greeting card — and it crashed five times during the Moon landing.Sat, 04 Jul 2026 00:00:00 GMThttps://7b672732.space-site-80d.pages.dev/facts/magnetars/https://7b672732.space-site-80d.pages.dev/facts/magnetars/A magnetar's field is a thousand trillion times stronger than Earth's — strong enough to distort atoms themselves. One once hit Earth from 50,000 light-years away.Fri, 03 Jul 2026 00:00:00 GMThttps://7b672732.space-site-80d.pages.dev/facts/oumuamua-interstellar-visitor/https://7b672732.space-site-80d.pages.dev/facts/oumuamua-interstellar-visitor/The first visitor from another star system was shaped like nothing we'd seen, had no comet tail — and sped up as it left. Scientists still argue about it.Thu, 02 Jul 2026 00:00:00 GMThttps://7b672732.space-site-80d.pages.dev/facts/olympus-mons/https://7b672732.space-site-80d.pages.dev/facts/olympus-mons/Olympus Mons is nearly three times the height of Everest and the size of an entire country — so wide its slopes would hide beyond your horizon.Wed, 01 Jul 2026 00:00:00 GMThttps://7b672732.space-site-80d.pages.dev/facts/fermi-paradox/https://7b672732.space-site-80d.pages.dev/facts/fermi-paradox/Billions of habitable planets, billions of years of time — yet total silence. The Fermi paradox is science's most unsettling unanswered question.Tue, 30 Jun 2026 00:00:00 GMThttps://7b672732.space-site-80d.pages.dev/facts/pioneer-plaque/https://7b672732.space-site-80d.pages.dev/facts/pioneer-plaque/The Pioneer plaque shows two humans and directions to our Sun, drawn for aliens. It sparked a debate that still rages: should we be advertising our address?Mon, 29 Jun 2026 00:00:00 GMThttps://7b672732.space-site-80d.pages.dev/facts/gold-from-neutron-stars/https://7b672732.space-site-80d.pages.dev/facts/gold-from-neutron-stars/In 2017, humanity watched two neutron stars collide — and confirmed that gold, platinum, and uranium are made in these cataclysms, not in ordinary stars.Sun, 28 Jun 2026 00:00:00 GMThttps://7b672732.space-site-80d.pages.dev/facts/great-attractor/https://7b672732.space-site-80d.pages.dev/facts/great-attractor/The Milky Way and thousands of neighboring galaxies are streaming toward a mysterious region called the Great Attractor — hidden behind our own galaxy's disk.Sat, 27 Jun 2026 00:00:00 GMThttps://7b672732.space-site-80d.pages.dev/facts/diamond-rain-neptune/https://7b672732.space-site-80d.pages.dev/facts/diamond-rain-neptune/Thousands of kilometers below the clouds of the ice giants, extreme pressure squeezes carbon into diamonds that fall like hail toward the core.Fri, 26 Jun 2026 00:00:00 GMThttps://7b672732.space-site-80d.pages.dev/facts/goldilocks-zone/https://7b672732.space-site-80d.pages.dev/facts/goldilocks-zone/Around every star is a band where water can stay liquid. Our galaxy alone may hold billions of rocky planets orbiting inside this Goldilocks zone.Thu, 25 Jun 2026 00:00:00 GMThttps://7b672732.space-site-80d.pages.dev/facts/apollo-12-lightning/https://7b672732.space-site-80d.pages.dev/facts/apollo-12-lightning/The rocket's systems failed, alarms flooded the cockpit, and one flight controller's obscure command — 'SCE to AUX' — saved the entire Moon mission.Wed, 24 Jun 2026 00:00:00 GMThttps://7b672732.space-site-80d.pages.dev/facts/biggest-black-hole-ton-618/https://7b672732.space-site-80d.pages.dev/facts/biggest-black-hole-ton-618/TON 618 weighs as much as 66 billion Suns. Its event horizon is so vast that light itself needs days to cross a region our entire solar system would vanish into.Tue, 23 Jun 2026 00:00:00 GMThttps://7b672732.space-site-80d.pages.dev/facts/fast-radio-bursts/https://7b672732.space-site-80d.pages.dev/facts/fast-radio-bursts/Fast radio bursts release more energy in a millisecond than the Sun does in days — and some of them repeat on a schedule. We still don't know why.Mon, 22 Jun 2026 00:00:00 GMThttps://7b672732.space-site-80d.pages.dev/facts/saturn-hexagon-storm/https://7b672732.space-site-80d.pages.dev/facts/saturn-hexagon-storm/At Saturn's north pole sits a six-sided jet stream 30,000 km across that has held its geometric shape for over 40 years. Nothing else like it exists.Sun, 21 Jun 2026 00:00:00 GMThttps://7b672732.space-site-80d.pages.dev/facts/tardigrades-survive-space/https://7b672732.space-site-80d.pages.dev/facts/tardigrades-survive-space/In 2007, scientists exposed tardigrades to open space — vacuum, radiation, freezing cold. Many of them simply woke up and carried on living.Sat, 20 Jun 2026 00:00:00 GMThttps://7b672732.space-site-80d.pages.dev/facts/voyager-golden-record/https://7b672732.space-site-80d.pages.dev/facts/voyager-golden-record/The Voyager Golden Record carries greetings in 55 languages, whale songs, and Chuck Berry — a message in a bottle meant to outlive Earth itself.Fri, 19 Jun 2026 00:00:00 GMThttps://7b672732.space-site-80d.pages.dev/facts/black-holes-dont-suck/https://7b672732.space-site-80d.pages.dev/facts/black-holes-dont-suck/Replace the Sun with a black hole of equal mass and Earth wouldn't move an inch. The 'cosmic vacuum cleaner' is one of astronomy's biggest myths.Thu, 18 Jun 2026 00:00:00 GMThttps://7b672732.space-site-80d.pages.dev/facts/dark-matter-invisible-universe/https://7b672732.space-site-80d.pages.dev/facts/dark-matter-invisible-universe/Every star, planet, and galaxy we can see is only a sliver of what exists. The rest is dark matter, and after 90 years we still don't know what it is.Wed, 17 Jun 2026 00:00:00 GMThttps://7b672732.space-site-80d.pages.dev/facts/day-on-venus-longer-than-year/https://7b672732.space-site-80d.pages.dev/facts/day-on-venus-longer-than-year/Venus takes 243 Earth days to spin once but only 225 to orbit the Sun. On Venus, your birthday comes around faster than sunrise.Tue, 16 Jun 2026 00:00:00 GMThttps://7b672732.space-site-80d.pages.dev/facts/neutron-star-teaspoon/https://7b672732.space-site-80d.pages.dev/facts/neutron-star-teaspoon/Neutron stars pack the mass of the Sun into a ball the size of a city. One teaspoon of their matter outweighs every human who has ever lived.Mon, 15 Jun 2026 00:00:00 GMThttps://7b672732.space-site-80d.pages.dev/facts/the-wow-signal/https://7b672732.space-site-80d.pages.dev/facts/the-wow-signal/In 1977, a radio telescope in Ohio caught a signal so strange the astronomer on duty circled it and wrote 'Wow!'. Nearly 50 years later, it has never repeated.Sun, 14 Jun 2026 00:00:00 GMThttps://7b672732.space-site-80d.pages.dev/facts/venus-hotter-than-mercury/https://7b672732.space-site-80d.pages.dev/facts/venus-hotter-than-mercury/Mercury sits twice as close to the Sun, yet Venus is the hottest planet in the solar system. The reason is a runaway greenhouse effect gone mad.Sat, 13 Jun 2026 00:00:00 GMT