Genesis (planet)

Genesis was a planet created from the gaseous matter of the Mutara Nebula as a result of the detonation of the Genesis device in 2285. Because David Marcus' use of unstable protomatter in the device, the planet degraded into an unlivable rock later that year. 

During its study of the planet, the USS Grissom (NCC-638) was destroyed by a Klingon bird-of-prey commanded by Kruge.