伦纳德彗星的长尾
(原标题: Comet Leonard's Long Tail)
2022-01-03
浏览次数: 15
你无法用望远镜看到伦纳德彗星极长的尾巴——它太长了。你也不能用双筒望远镜看到它——还是太长了。或者用你的眼睛看——太暗了；或者从城市看——天空太亮了。但是在一个地平线很低的黑暗地方，你的相机可以。如果今天这颗彗星在水星和金星轨道之间与太阳最近的相遇中幸存下来，它仍然有可能存在。这张特色照片是上月底在西班牙加那利群岛的拉帕尔马拍摄的两张广角深相机照片。之后，如果它幸存下来，莱纳德彗星的彗核将离开我们的太阳系，永远不会回来。
查看原文解释
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 dark location with a low horizon — your camera could. And still might -- if the comet survives today's closest encounter with the Sun, which occurs between the orbits of Mercury and Venus. The featured picture was created from two deep and wide-angle camera images taken from La Palma in the Canary Islands of Spain late last month. Afterwards, if it survives, what is left of Comet Leonard's nucleus will head out of our Solar System, never to return.
© Jan Hattenbach