Interstellar comet 3I/ATLAS is just the third such object ever confirmed to have entered our solar system. It has attracted ...

The newborn planetary system appears to be emerging 1,300 light-years away around a baby star known as HOPS-315. Planet-forming materials were first identified using NASA's James Webb Space Telescope.

A new peer-reviewed study finds that early planet formations were assembled from fragments of earlier bodies within the Solar System.

A view of HOPS-315, a baby star some 1,400 light-years from Earth where astronomers have observed evidence for the earliest stages of planet formation. Combined with data from the James Webb Space ...

The European Space Agency's two Mars orbiters take their shot at getting pictures of the exotic interstellar comet 3I/ATLAS.

Our solar system is a smashing success. A new study suggests that from its earliest period—even before the last of its nebular gas had been consumed—Earth's solar system and its planets looked more ...

In an extraordinary celestial event, the interstellar comet 3I/ATLAS has made its presence known as it passed by Mars last week. This rare phenomenon marks only the third confirmed instance of an ...

Comet 3I/ATLAS, an interstellar object, passed by Mars last week, rare images were captured by the ExoMars Trace Gas Orbiter ...

A new study suggests yet another theory for a possible extra planet in our solar system, likely of a size between Mercury and ...

This image provided by NASA/European Space Agency shows an image captured by Hubble of the interstellar comet 3I/ATLAS on July 21, 2025, when the comet was 277 million miles from Earth. (NASA/European ...

The main working hypothesis for the Mercury problem says that the planet is the victim of a collision with a different-sized object. The cataclysmic collision stripped much of the planet's mantle and ...