Track the International Space Station in real time, see NASA's Photo of the Day, and follow the latest space news — all updated live, every 10 seconds.
The International Space Station orbits Earth at ~28,000 km/h, completing an orbit every 90 minutes.
Today's image from NASA's Astronomy Picture of the Day.
Current crew aboard the ISS and other spacecraft.
Top space, NASA, and rocketry stories right now — filtered from Hacker News.
Top picks for backyard astronomers and space enthusiasts.
The universe is weirder than you think. A new fact every time you visit.
The Moon is moving away
The Moon drifts about 3.8 cm farther from Earth every year. In about 600 million years, total solar eclipses will no longer be possible.
Light from the Sun is 8 minutes old
The sunlight hitting your eyes right now left the Sun 8 minutes and 20 seconds ago, traveling at 299,792 km/s the entire way.
JWST sees 13.8 billion years back
The James Webb Space Telescope can detect galaxies formed just 300 million years after the Big Bang — we're looking back nearly to the beginning of the universe.
Saturn would float on water
Saturn's density is so low (0.687 g/cm³) that if you could find a bathtub large enough, the entire planet would float. It's mostly hydrogen and helium gas.
More stars than grains of sand
There are an estimated 10²⁴ stars in the observable universe — roughly 10 times more than all the grains of sand on Earth's beaches and deserts combined.
The farthest human-made object
Launched in 1977, Voyager 1 is now over 24 billion km from Earth — in interstellar space. Its signals, traveling at the speed of light, take 22+ hours to reach us.
Guides, explainers, and deep dives into the universe.
The ISS is the third-brightest object in the night sky. Here's exactly how to find it, when to look, and what you'll see.
Galaxies from 300 million years after the Big Bang, exoplanet atmospheres, and stellar nurseries in unprecedented detail.
The Moon, Saturn's rings, Jupiter's moons — what you can see at every budget, and which scopes to avoid.
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