2026년 08월 09일: NASA APOD - A Messier Moment for Tempel 2
NASA APOD - A Messier Moment for Tempel 2 NASA(American Aerospace Administration, 미국항공우주국)가 매일 공개하는 천문학 이미지 Astronomy Picture of the Day(APOD) 시리즈는 우주의 아름다운 신비를 보여주는 것으로 유명합니다. 아래 사진은 2026년 08월 09일 에 게재된 오늘의 천체사진입니다. 현재 시각 기준 12:30 KST 입니다. 상세 설명 Which of these is not a comet? You guessed it - the one on the right is a globular star cluster. The diffuse greenish coma of periodic comet 10P/Tempel 2 is at left in the frame. In fact the globular star cluster is Messier 30, also known as M30, or the 30th entry in astronomer Charles Messier's catalog of things which are not comets. The well-known 18th century astronomer kept a list of objects he observed, now his famous Messier Catalogue of Nebulae and Star Clusters, which did not move from night to night against the background stars and so were not the comets he was hunting for. So the famous comet hunter would get the correct answer too, even though his telescope would show both 10P/Tempel 2 and distant star cluster as similar...
