News

A New Comet Is Streaking Across the Morning Sky. Catch It Before the Sun Does
The newly discovered comet, C/2025 F2 (SWAN), is racing toward the Sun, and it may not survive its closest approach.
There's a bright new comet in the sky—and it's green
Currently only visible from the Northern Hemisphere, C/2025 F2 (SWAN) looks like a small green sphere. Its vivid green glow is caused by diatomic carbon molecules, which emit a green light under the ...