Supernova SN 2011dh in Messier 51
On 31 may 2011, several observers discovered SN 2011dh in Messier 51, the well-known “Whirlpool” galaxy. It was the third object of this kind found in this galaxy since 1994. A few days later,...
On 31 may 2011, several observers discovered SN 2011dh in Messier 51, the well-known “Whirlpool” galaxy. It was the third object of this kind found in this galaxy since 1994. A few days later,...
– Comets C/2025 A6 Lemmon & C/2025 R2 SWAN 2025 flyby (20 Oct. 2025)