Earth’s sister planet reaches greatest western elongation and dichotomy as the waxing Moon slides along the ecliptic in the ...

A newly identified dwarf planet, named 2017 OF201, has been discovered in the distant outer reaches of the solar system.

The CNSA said the Tianwen 2 mission is expected to accomplish multiple objectives through a single expedition, including the ...

The small world was found during a search for the hypothetical Planet Nine, and astronomers say the next time it will reach ...

U.S. astronomers hunting for "Planet Nine" have instead stumbled on what appears to be a new dwarf planet in the solar system ...

As it orbits the sun once every 25,000 years, the celestial body 2017 OF201 travels beyond the Kuiper Belt into a region ...

A recent study has cast a concerning spotlight on a previously underestimated celestial threat: asteroids co-orbiting Venus.

Scientists warn that over the next five billion years, there’s a tiny chance Earth could be flung from the solar system by a ...

Simulations show that the stars’ tug could send Mercury, Venus or Mars crashing into Earth — or let Jupiter eject our world from the solar system.

Astronomers are using data from the recently decommissioned star-mapping satellite to help determine masses and more accurate ...

Tianwen, which means "questions to heaven," is the name given to China's program of robotic Solar System exploration. Tianwen ...