Explained

Lights from the Space Station

Catalog FG-078When 2005 – 2020Where International Space Station

Astronauts on the ISS report and film strange lights. Each one has a down-to-earth answer.

Life on the space station has produced a steady trickle of sightings. During a 2005 spacewalk Leroy Chiao saw a line of lights below him. In 2013 Christopher Cassidy reported an object near a cargo ship. In 2020 cosmonaut Ivan Vagner posted a video of 'space guests' crossing the sky.

Weigh the evidence

The ledger

What the record shows, what people say, and the best explanation available so far.

What's documented

  • The astronauts' own posts and interviews.

What's claimed

  • Craft observing the space station.

Best explanation so far

Chiao later identified his lights as fishing boats hundreds of miles below. Russian controllers identified Cassidy's object as an antenna cover from the Zvezda module. Vagner's lights were later matched to satellites.

Where to look

Check the sources

Go to the originals. Every link opens the archive or record in a new tab.