The simulation of the Solar System that came the closest to the observation was the presence of a small planet, between the ...

A new study has proposed the existence of Planet Y, an alternative Planet Nine candidate that is smaller and closer to Earth ...

Since Pluto was relegated to dwarf planet status, almost everyone has agreed that there are eight planets in our solar system ...

Astronomers are investigating a potential hidden planet, dubbed Planet Y, far beyond Neptune. Its gravitational pull is ...

There are a couple of ways that scientists can date planets, so which planets formed first in our solar system?

An alien comet passing through our solar system made its closest approach to Mars recently, and two European robotic ...

KENNEDY SPACE CENTER — SpaceX’s Falcon 9 rocket pierced the Wednesday morning sky as it launched three spacecraft from NASA and NOAA that will study the solar system’s “bubble,” collect information on ...

It will be a while before you can see it for yourself, however. Halley’s comet was last visible from Earth in 1986, meaning ...

We take a look at what the discovery of liquid water under Mars’ surface could mean, we discover how space affects the human ...

Astronomers believe they may have uncovered evidence of a hidden Earth -size planet lurking in the outer solar system. Dubbed “Planet Y”, the proposed world could be nearly twice as close to Earth as ...

This type of thermal energy storage, also known as ice batteries, is being added to buildings in the U.S. for its ability to ...

A low-density, puffy planet orbiting relatively far from a young star in a nearly perpendicular orbit. What's going on?