M35
Shoe-Buckle Cluster
특성
위치 & 식별자
가시성
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M35 소개
설명
M35 is a large, bright open cluster in Gemini, about 2,800 light-years from Earth. It contains roughly 200 stars spread across about 24 light-years, with an age of about 100 million years. The cluster is a beautiful visual target, especially when viewed alongside the much more distant and compact cluster NGC 2158, which lies just 25 arcminutes to the southwest.
관측 팁
Located near the 'foot' of Gemini, about 2.5 degrees northwest of Eta Geminorum. Visible to the naked eye as a hazy patch. Binoculars show a large, rich scattering of stars. A telescope at 40-60x reveals a stunning field of perhaps 100 stars with curving chains. At the southwest edge, look for the compact, much fainter glow of NGC 2158 — a beautiful contrast of a nearby vs. distant cluster. Best observed from December through April.
역사
Discovered by Philippe Loys de Cheseaux around 1745-46 and independently found by John Bevis before 1750. Charles Messier cataloged it in 1764.
재미있는 사실
The pairing of M35 with NGC 2158 is a wonderful lesson in astronomical perspective. M35 is 2,800 light-years away while NGC 2158 is about 11,000 light-years distant — four times farther. NGC 2158 is also much older (about 1 billion years), so comparing the two shows how clusters age.
