Astronomers analyzed the vapors coming off the comet when it neared the sun and found it had a lot of "heavy" water. That ...

Measurements of this interstellar comet’s molecular makeup show an excess of heavy water molecules that is dramatically ...

The ion tail appeared as Comet C/2025 R3 PanSTARRS was about 45 million miles from Earth (72 million kilometers) during its ...

Having survived its closest pass to the sun during perihelion on April 19, Comet PanSTARRS is now en route to its nearest ...

Research findings are available online in the journal Nature Astronomy. The original story “ Interstellar Comet 3I/ATLAS ...

Comet C/2025 R3 is putting on its final show as it passes close to the Sun before leaving the solar system forever.

Astronomers studying interstellar comet 3I/ATLAS have measured a deuterium-to-hydrogen ratio in its water more than 30 times higher than in solar system comets and over 40 times Earth's oceans. The ...

Scientists have traced interstellar comet 3I/ATLAS to an extremely cold, isolated region of the galaxy, possibly dating back 10–12 billion years. Its unusually high deuterium content suggests it ...

Scientists have traced the origins of the interstellar comet 3I/Atlas to a cold, isolated part of the galaxy, providing insights into early planet formation.

The Lyrid meteor shower is expected to bring fiery streaks to the night sky. The show will be visible across the globe, but ...

Forecasters say weather conditions are set to be ideal in the UK for the Lyrids meteor shower as little cloud is expected in ...