Satellite Tracking Tool: Track the ISS & Hubble
The International Space Station passes over virtually all of Earth's populated areas, and you can spot it easily with your eyes alone — if you know where and when to look for it.
Satellite Transit Tool: Spot ISS Transits of the Sun and Moon
The International Space Station often passes close to the Moon, Sun, and naked-eye planets. Use this tool to plan viewing these close encounters.
For a few days each May, you might see the International Space whenever it passes overhead throughout the night.
How to Catch an Iridium Flare
These communications satellites can briefly outshine Venus as they spray the ground with reflected sunlight.
Take a "Sat-seeing" Tour
It’s a bird! It’s a plane! It’s the International Space Station! Learn how to spot Earth's artificial satellites.
Have You Been Flashed By Iridium?
The Iridium satellites' antenna arrays are almost perfect mirrors. And when they catch the Sun just right — wow!