NASA的詹姆斯·韦伯太空望远镜在罕见的主带彗星中发现了水和一个新的谜团
利用韦伯的NIRSpec（近红外光谱仪）仪器，天文学家首次证实了在主小行星带的一颗彗星周围存在气体——特别是水蒸气，这表明原始太阳系的水冰可以保存在该区域。
标签： 彗星
远去的ZTF彗星
2023年3月24日 Outbound Comet ZTF Image Credit & Copyright: Rolando Ligustri Explanation: Former darling of the northern sky Comet C/2022E3 (ZTF) has faded. During its closest approach to our fair planet in early February Comet ZTF was a mere 2.3 light-minutes distant. Then known as the green comet, this visitor from the remote Oort Cloud is now nearly 13.3...
ZTF遇到ATLAS彗星
2023年2月10日 ZTF meets ATLAS Image Credit & Copyright: Stefan Bemmerl Explanation: Fading as it races across planet Earth’s northern skies comet C/2022 E3 (ZTF) shares this telescopic frame with comet C/2022 U2 (ATLAS). Captured on the night of February 6 from a garden observatory in Germany’s Bavarian Forest, the starry field of view toward t...
埃特纳火山上空的ZTF彗星
2023年1月28日 Comet ZTF over Mount Etna Image Credit & Copyright: Dario Giannobile Explanation: Comet-like plumes are blowing over the volcanic peaks of Mount Etna in this wintry mountain-and-skyscape from planet Earth. The stacked and blended combination of individual exposures recorded during the cold night of January 23, also capture naked-eye Comet ZTF...
ZTF彗星: 穿过其轨道面所见的景观
2023年1月27日 Comet ZTF: Orbital Plane Crossing Image Credit & Copyright: Dan Bartlett Explanation: The current darling of the northern night, Comet C/2022 E3 ZTF is captured in this telescopic image from a dark sky location at June Lake, California. Of course Comet ZTF has been growing brighter in recent days, headed for its closest approach to Earth on F...
肉眼可见的ZTF彗星
2023年1月21日 Naked-eye Comet ZTF Image Credit & Copyright: Óscar Martín Mesonero (Organización Salmantina de la Astronáutica y el Espacio) Explanation: Comet C/2022E3 (ZTF) is no longer too dim to require a telescope for viewing. By January 19, it could just be seen with the naked eye in this rural sky with little light pollution from a location about 20 ...
彗星2022 E3 (ZTF)
2022年12月24日 Comet 2022 E3 (ZTF) Image Credit & Copyright: Dan Bartlett Explanation: Comet C/2022 E3 (ZTF) was discovered by astronomers using the wide-field survey camera at the Zwicky Transient Facility this year in early March. Since then the new long-period comet has brightened substantially and is now sweeping across the northern constellation Coron...
七年的哈雷尘埃
2022年10月28日 Seven Years of Halley Dust Image Credit & Copyright: Petr Horalek / Institute of Physics in Opava Explanation: History’s first known periodic comet Halley (1P/Halley) returns to the inner Solar System every 75 years or so. The famous comet made its last appearance to the naked-eye in 1986. But dusty debris from Comet Halley can be seen...
南天的二颗彗星
2022年10月8日 Two Comets in Southern Skies Image Credit & Copyright: Jose J. Chambo (Cometografia) Explanation: Heading for its closest approach to the Sun or perihelion on December 20, comet C/2017 K2 (PanSTARRS) remains a sight for telescopic observers as it sweeps through planet Earth’s southern hemisphere skies. First time visitor from the remote...
星尘与彗尾
2022年8月20日 Stardust and Comet Tails Image Credit & Copyright: Rolando Ligustri (CARA Project, CAST) Explanation: Heading for its closest approach to the Sun, or perihelion, on December 19 comet C/2017 K2 (PanSTARRS) remains a sight for telescopic observers as it sweeps through planet Earth’s skies in the constellation Scorpius. The comet currently...