Astronomy Picture of the Day

The cosmos, daily.

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ISS Position

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Next Launch

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Closest Asteroid

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In Space Now

humans in orbit

Live Tracking

International Space Station

Current position updated every 5 seconds. The ISS orbits at ~408 km altitude, completing one orbit every 92 minutes.

Full tracker →

Live

Latitude

Longitude

Altitude

Velocity

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Mission Control

Upcoming Launches

Next confirmed launches from the global launch manifest.

All launches →

Planetary Defense

Near-Earth Objects

Asteroids and comets making close approaches in the next 7 days, sourced from NASA's NeoWs.

Full data →

Object	Approach Date	Miss Distance	Size · Speed	Proximity
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Data: NASA CNEOS · JPL Horizons · Asterank

Planetarium

Tonight's Sky

Explore a full interactive planetarium for your exact location — powered by Stellarium.

Night sky page →

🔭

Stellarium Web

Full planetarium in your browser

Real-time sky for your location. Click any star, nebula, or galaxy for full data. The gold standard for amateur astronomy software — free and open source since 2001.

Open Source
stellarium-web.org ↗

The Toolkit

Explore the universe

Best-in-class tools for exploring, visualizing, and understanding space.

All tools →

NASA · Free 🪐

NASA Eyes on the Solar System

Real-time 3D simulation of the entire solar system. Ride along with every NASA mission ever launched. Track 30,000+ asteroids. The most accurate solar system simulator available, free, in your browser.

eyes.nasa.gov

Desktop App 🌌

SpaceEngine

Travel anywhere in a procedurally generated universe of 100 billion galaxies. Land on alien worlds. Watch stars being born. The closest humanity has come to a true universe simulator.

spaceengine.org

AAS · Free 📡

WorldWide Telescope

Explore the universe as seen by the world's greatest telescopes — Hubble, Chandra, Spitzer, and more. Real astronomical imagery stitched into a seamless interactive sky.

worldwidetelescope.org

CDS Strasbourg 🗺️

Aladin Sky Atlas

Interactive sky atlas from the Centre de Données astronomiques de Strasbourg. Access hundreds of surveys including DSS, 2MASS, SDSS, and WISE.

aladin.cds.unistra.fr

Satellites 🛰️

Heavens-Above

Predict exactly when the ISS, Hubble, Starlink trains, and hundreds of other satellites will pass over your location — and at what brightness.

heavens-above.com

Sky Guide 🌠

In The Sky

Detailed sky events, planet visibility, meteor showers, and astronomical phenomena — all calculated for your exact location and date.

in-the-sky.org