李奥纳德彗星的长尾
2022年1月3日 Comet Leonard’s Long Tail Image Credit & Copyright: Jan Hattenbach Explanation: You couldn’t see Comet Leonard’s extremely long tail with a telescope — it was just too long. You also couldn’t see it with binoculars — still too long. Or with your eyes — it was too dim. Or from a city — the sky was too bright. But from a ...