Earth objects, astronomers recently discovered a comet visiting from interstellar space. This is only the third interstellar ...

Just the third-ever confirmed interstellar object has been detected in our solar system. Here's what we know. (Spoiler: It's ...

A fascinating glimpse into how a solar system like our own is born has been revealed with the detection of planet-forming ...

Earth Does Not Orbit Around the Sun But Around a 'Center of Mass,' Claim Researchers 'How planets revolve' is possibly one of the first extraterrestrial phenomena that educators taught students at ...

A possible dwarf planet, like Pluto, has been observed in our solar system, according to a preprint published in arXiv. The area of space where this planet was found was previously thought empty.

By orbiting the Sun outside of the Solar System’s orbital plane, the spacecraft has captured the first clear images of the Sun’s south pole. According to the ESA, these observations (and other ...

The robotic Solar Orbiter spacecraft has obtained the first images ever taken of our sun's two poles as scientists seek a deeper understanding of Earth's host star, including its magnetic field ...

A possible cousin of Pluto seems to be circling the far reaches of the solar system. The dwarf planet candidate 2017 OF201 travels in a superwide orbit, with the sun relatively near one end of its ...

A new dwarf planet, discovered beyond Neptune and described as Pluto's 'cousin,' could void the hypothesis of a Planet X in our solar system.

Learn about the recently discovered trans-Neptunian object that may eventually join Pluto as a dwarf planet, found at the edge of our solar system.

A new dwarf planet? Image Credit: images of dwarf planets from NASA/JPL-Caltech; image of 2017 OF 201 from Sihao Cheng et al. The Solar System has just gotten a new official member.

A composite image showing the five dwarf planets recognized by the International Astronomical Union, plus the newly discovered trans-Neptunian object 2017 OF201.