Seven and a half kilometres every single second.
Seven and a half kilometres every single second. That is how fast the International Space Station is moving right now, with humans aboard. At roughly 28,000 kilometres per hour, it completes a full lap of Earth in just 90 minutes — shorter than most films. Cresting 400 kilometres above the surface, the crew watches the day-night boundary sweep beneath them again and again. Sixteen sunrises, sixteen sunsets, every single day. Not as metaphor — as daily routine. Dawn breaks every 90 minutes up there, which means the crew rely on strict schedules and artificial lighting just to know when to sleep. And someone has been living inside that hurtling outpost continuously since November 2000. Over two decades of unbroken human presence, circling the planet at a speed that would cross the UK in under ten seconds. Follow Deep Field Vault for more of the universe.