Quadrantid Meteors through Orion


Why are these meteor trails nearly parallel? Because they were all shed by the same space rock and so can be traced back to the same direction on the sky: the radiant of the Quadrantid Meteor Shower. This direction used to be toward the old constellation of Quadrans Muralis, hence the name Quadrantids, but when the International Astronomical Union formulated its list of modern constellations in 1922, this constellation did not make the list. Even though the meteors are now considered to originate from the recognized constellation of Bootes, the old name stuck. Regardless of the designation, every January the Earth moves through a dust stream and bits of this dust glow as meteors as they heat up in Earth's atmosphere. The featured image composite was taken on January 4 with a picturesque snowy Slovakian landscape in the foreground, and a deep-exposure sky prominently featuring the constellation Orion in the background. The red star Betelgeuse appears unusually dim -- its fading over the past few months is being tracked by astronomers. via NASA https://ift.tt/2G64LUf

댓글

이 블로그의 인기 게시물

[펌] 구글 마켓에 있는 apk를 PC로 바로 다운받자

스냅드래곤 기반 크롬북, ‘트로그도어’ 개발 중

일본 에이브이 배우들 인스타그램 주소가 어디보자..(페북 펌)