A freshly-identified comet hurling towards the Sun is now bright enough to see from Earth. Dubbed C/2025 F2 (SWAN), the ...

Bromine is one of only two liquid elements. Iodine is solid. They exist as diatomic molecules - they have two atoms in each molecule. As you go down the group the halogens become less reactive.

A new comet, officially designated SWAN25F, has entered the morning skies of the Northern Hemisphere, and it’s already visible with binoculars. The comet was first spotted on April 1, 2025, by ...