Interstellar comet 3I/ATLAS — just the third such object ever confirmed to have entered our solar system — flew past Mars ...

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

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 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 ...

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

The comet, named 3I/ATLAS, is only the third confirmed interstellar object ever seen in our solar system. That means it came ...

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 ...

Our solar system is a smashing success.A new study suggests that from its earliest period — even before the last of its ...

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 ...