标签: coma

摄于澳洲的李奥纳德彗星特写

2022年1月12日 Comet Leonard Closeup from Australia Image Credit & Copyright: Blake Estes (itelescope.net) Explanation: What does Comet Leonard look like up close? Although we can’t go there, imaging the comet’s coma and inner tails through a small telescope gives us a good idea. As the name implies, the ion tail is made of ionized gas — g...

伦纳德彗星

2021年11月21日 Introducing Comet Leonard Image Credit & Copyright: Dan Bartlett Explanation: Here comes Comet Leonard. Comet C/2021 A1 (Leonard) was discovered as a faint smudge in January 2021 when it was out past Mars — but its orbit will take the giant shedding ice-ball into the inner Solar System, passing near both Earth and Venus in December bef...