How does a 15-kilometer-wide comet, moving at 152,000 miles per hour, slip into our solar system undetected until a global ...

In an exciting and rare new discovery, astronomers recently confirmed that a third known interstellar object has entered our solar system. The interstellar comet, dubbed "3I/ATLAS", was initially ...

How do we know 3I/ATLAS, also called comet C/2025 N1 (ATLAS), is interstellar? Will it strike Earth? Can we visit it? Here ...

Astronomers have observed an object that originated from beyond our solar system, thought to be an interstellar comet, ...

The second half of July and the early days of August are the perfect time to get outside and look at the night sky.

The NASA-funded ATLAS (Asteroid Terrestrial-impact Last Alert System) survey telescope in Rio Hurtado, Chile, first reported observations to the Minor Planet Center of comet 3I/ATLAS on July 1, 2025.

The comet successfully reached perihelion, its closest point to the sun in its orbital path around the parent star, on September 27, ...

The comet successfully reached perihelion, its closest point to the sun in its orbital path around the parent star, on September 27, ...

The comet successfully reached perihelion, its closest point to the sun in its orbital path around the parent star, on Sept. 27 and was visible for those in the Southern Hemisphere in September ...