2025年10月20日
寻找莱蒙彗星
影像提供与版权: Petr Horalek / Institute of Physics in Opava
说明: 今晚，如果你能看到北斗七星，那么你就可以在夜空中找到彗星莱蒙。日落后，请在您的西北地平线上寻找这颗微弱但延伸的彗星，它位于北方著名的天体厨具的把手下方。用手机拍照可能更容易看到这位内太阳系的访客，因为它更擅长捕捉微弱的物体。无论如何，请寻找一颗带有尾巴的模糊绿色“星星”，尽管它的尾巴可能不如两天前在捷克共和国塞奇湖上空拍摄的这张令人印象深刻的照片那么长。最近拍摄的C/2025 A6（莱蒙 Lemmon）照片通常显示出一条精细且不断变化的离子尾，其延伸范围超出了肉眼所能追踪的范围。这颗绕太阳运行的彗星目前已接近其最靠近地球的位置，并将于11月初通过其最接近太阳的位置。
明日的图片: big heart
Due to the lapse in federal government funding, NASA is not updating APOD website. We sincerely regret this inconvenience.
由于美国联邦政府资金中断，NASA目前暂停更新APOD网站。对此带来的不便，我们深感抱歉。
英文原文:
Explanation: Tonight, if you can see the stars of the Big Dipper , then you can find comet Lemmon in your evening sky. After sunset, look for the faint but extended comet above your northwestern horizon — but below the handle of the famous celestial kitchen utensil of the north. It might be easier to see this visitor to the inner Solar System through your camera phone, which is better at picking up faint objects. Either way, look for a fuzzy green ‘star’ with a tail, though probably not so long a tail as in this impressive snapshot taken over Seč Lake in the Czech Republic two nights ago. Recent photographs of C/2025 A6 (Lemmon) often show a detailed and changing ion tail which extends farther than the eye can follow. This Sun-orbiting comet is now near its closest approach to Earth and will pass its closest to the Sun in early November.
