Green Comet 2024 Nasa. A newly discovered comet will make its closest approach to our planet on wednesday. For months, the comet has been moving closer to earth and as a result it's becoming more visible in.

 — this comet is green because its coma—the gassy shroud surrounding its nucleus—contains a reactive compound called diatomic carbon (c2), which is bright in. It passed its closest to the sun in late.