Quote Originally Posted by Takeovers View Post
The 1996 collision between the French Cerise military reconnaissance satellite and debris from an Ariane rocket.
The 2009 collision between the Iridium 33 communications satellite and the derelict Russian Kosmos 2251 spacecraft, which resulted in the destruction of both satellites.
The 22 January 2013 collision between debris from Fengyun FY-1C satellite and the Russian BLITS nano-satellite.
The 22 May 2013 collision between two CubeSats, Ecuador's NEE-01 Pegaso and Argentina's CubeBug-1, and the particles of a debris cloud around a Tsyklon-3 upper stage (SCN 15890)[1] left over from the launch of Kosmos 1666.

One of those was a real satellite to satellite collision.

The 2009 collision between the Iridium 33 communications satellite and the derelict Russian Kosmos 2251 spacecraft, which resulted in the destruction of both satellites.

Satellite collision - Wikipedia

Fortunately they are rare. Satellites are getting more. But satellite tracking and collision avoidance is also getting better.

Much worse is space debris by not deorbited dead satellites and upper stages that are not properly passivised and explode later. Notorious are old US spy sats and ULA upper stages. But russian upper stages too. They use many of them. Reason is usually not properly terminated batteries, sometimes residual propellant that should have been vented.
I had no idea. Sounds like space isn't so safe after all, or simple.
To avoid further accidents, would all of the different entities sending items into orbit need to coordinate somehow, sharing orbit info so that each can ensure that no orbits cross at the same time. I can't even imagine the nightmare of trying to piece together such logistics.
But more importantly, having a fail-safe plan for disposing of satellites at the end of their lives is essential.