Vixen VC200L EOS KISS X3 ISO 3200 No guide, stacked 3×120 Seconds Exposure The experienced astrophotographers produce better photos of M51 by using VC200L telescope. 子持ち銀河は1773年10月13日にシャルル・メシエが発見した。しかしこのとき、メシエは伴銀河は発見していない。伴銀河はピエール・メシャンが1781年に発見した。 子持ち銀河は明るい銀河で双眼鏡でも観測できるためアマチュア天文家にも人気が高い。双方の銀河を結ぶ腕は口径10cm程度の望遠鏡でも見えるという人もいる。 (Wikipedia より） （注）これは初心者の写真です。熟練天文写真家はより高質の写真を撮ります。 The Whirlpool Galaxy (also known as Messier 51a, M51a, or NGC 5194) is an interacting[4] grand-design[5] spiral galaxy located at a distance of approximately 31 million light-years in the constellation Canes Venatici. It is one of the most famous spiral galaxies in the sky.[citation needed] The galaxy and its companion (NGC 5195) are easily observed by amateur astronomers, and the two galaxies may even be seen with binoculars.[6] The Whirlpool Galaxy is also a popular target for professional astronomers, who study it to further understanding of galaxy structure (particularly structure associated with the spiral arms) and galaxy interactions. （From Wikipedia)