Comet Lemmon (C/2025 A6) is rapidly brightening and could reach naked-eye visibility in October. Here’s how and when to see ...

Normally, comets get that green coloration from dicarbon, a rare molecule formed when sunlight breaks down carbon-based gases ...

New photos from the recent 'blood moon' eclipse show that interstellar comet 3I/ATLAS may be turning green as it gets closer ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. Newly discovered comet SWAN25F will reach its closest point to the sun on May 1, but lots of ...

On September 7, 2025, the world witnessed a breathtaking total lunar eclipse — but what two amateur astronomers captured from Namibia during that event left scientists stunned. Interstellar comet ...

A freshly-identified comet hurling towards the Sun is now bright enough to see from Earth. Dubbed C/2025 F2 (SWAN), the dust-laden streak is nicknamed for the SWAN instrument aboard the European Space ...

When a new comet appears in the sky, there is often excitement. But things don’t always end well for the ancient celestial objects, made of ice, frozen gases and rock, as they near the sun — and an ...

The night sky will come alive this weekend when a green comet streaks by Earth on the heels of the Geminid meteor shower's display of green fireballs. The night sky will come alive this weekend when a ...

Lovejoy will be a sight to see in 2015. — -- Here's a cosmic New Year's treat: A glowing green comet will shine brighter into the New Year, providing an incredible opportunity for skygazers to ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. When a new comet ...