An extraordinary green comet that hasn’t appeared in Earth’s night skies since the time of woolly mammoths will make its closest approach Wednesday and Thursday. Scientists have calculated the ...

The green comet's path. Green comets are rare, but we've seen them at times. One of them was Comet ISON, which visited Earth in 2013. ISON and C/2022 E3 (ZTF) are believed to have originated in ...

A newly discovered green comet is zipping by Earth and is now visible for the first time in more than 400 years. Comet Nishimura was discovered by amateur Japanese astronomer Hideo Nishimura on ...

Green comet 2023 – live: How to see E3 in sky tonight before it disappears forever. C/2022 E3 (ZTF) comet is visible with the naked eye from certain locations.

The green comet has also been snapped by the Virtual Telescope Project in Manciano, Italy. One of the best photos of SWAN25F so far was captured by astrophotographers Michael Jäger and Gerald ...

A newly discovered comet, C/2025 F2 (SWAN), is now visible in the eastern sky before dawn. Officially designated on April 8, 2025, it was first spotted in images from NASA's SOHO observatory.

The comet, also designated C/2025 F2, would have been visible just after dark slightly north of where the sun set. Its green color would have been difficult to see with the naked eye.