Null launch: Cygnus X-1

03 APR 2026 Null launch (@852.null): Cygnus X-1

Cygnus X-1 (abbreviated Cyg X-1) is a galactic X-ray source located in the constellation Cygnus, approximately 7,000 light-years from Earth.

It holds historic significance as the first astronomical object widely accepted to be a black hole.