ESA uses a camera in ExoMars Trace Gas Orbiter to capture 3I/ATLAS when it was 18.6 million miles from the Red Planet.

A comet traveling outside the solar system and heading toward the Earth is much larger than scientists first believed, a scientist has detailed in a new report. Avi Loeb claims the comet could even be ...

Astronomers are tracking a newly discovered interstellar visitor called 3I/ATLAS, and early research suggests it may be unusually massive. The comet was first spotted on July 1, 2025, by the ATLAS ...

Alfredo has a PhD in Astrophysics and a Master's in Quantum Fields and Fundamental Forces from Imperial College London.View full profile Alfredo has a PhD in Astrophysics and a Master's in Quantum ...

3I/ATLAS likely weighs more than 33 billion tons. The interstellar object hurtling toward the inner solar system, where Earth is located, is much larger than previously thought, astronomers say. A ...

The total mass loss rate and outflow speed from its 3I/Atlas surface was used to infer its mass. The mass of 3I/ATLAS must be bigger than 33 billion tons. The diameter of its solid-density nucleus ...

On Sept. 7 2025, the skies darkened as Earth's shadow consumed the moon. Skywatchers in many parts of the world saw the moon turn blood red due to a total lunar eclipse. For amateur astronomers ...

Named 3I/ATLAS, this comet is the third-ever interstellar visitor to our solar system to be observed by astronomers. By the end of this month, it'll pass behind Mars and be blocked from our view, ...

Back in July, scientists operating a planetary defense facility designed to detect potentially hazardous asteroids spotted a visitor from another star: an interstellar object, and the third of its ...

Right now a comet is hurtling through our solar system at more than 137,000 miles per hour. But it is not just this interstellar object’s speed that has earthly astronomers glued to their telescopes.

The eyes of every astronomer widened this year when an interstellar traveler was discovered in our solar system. Despite some suggestions that it could be an alien spacecraft, observations from some ...