Fresh mapping of the outer solar system has revealed a previously unseen pattern in the Kuiper Belt, the icy ring of debris ...

Researchers refined the trajectory of interstellar comet 3I/ATLAS using ExoMars Trace Gas Orbiter data, improving predictions and enabling precise monitoring for scientific study and planetary defense ...

Little is known about the long-destroyed moon-forming planet, Theia. But it may have been born in the inner solar system—just like Earth—a new study suggests ...

Far beyond Neptune, at the far outer rim of our Solar System, astronomers have spotted what looks like a hidden “structure” ...

About 4.5 billion years ago, Earth had a violent neighbor. A young, still-forming planet named Theia slammed into our world with enough force to melt vast portions of its mantle and scatter a huge ...

Key Findings The moon once dismissed as the solar system's most hostile environment may now sit directly in the path of an ...

NASA’s nearly complete Nancy Grace Roman Space Telescope has made another set of critical strides toward launch. This fall, the outer portion passed two tests — a shake test and an intense sound blast ...

That’s also true for the other moons that provide the gravitational stress. As a result, the internal oceans may actually ...

According to the leading theory of how the Earth-Moon system formed (the Giant Impact Hypothesis), a Mars-sized object (named ...

Theia, the world that helped form the Moon, came from the Solar System. Chemical clues in Earth and Moon rocks reveal this ...

Scientists traced the Moon's parent planet Theia to the inner Solar System, solving a 4.5-billion-year mystery.

Researchers say the finding may also shed light on how giant planets gradually shifted to their current orbits and what interstellar conditions the solar system faced during its birth.