The solar system consists of our star, the sun, and everything bound to it by gravity: the planets Mercury, Venus, Earth, ...

It is clear, however, that the planets cannot have entered the system ... solar tidal friction may be adequate to explain the facts that one of the satellites of Mars and the particles at the ...

"If it's one or two Earth masses, which is still a pretty big planet, our inner Solar System would still remain quite nice," says Simpson. "We might experience slightly hotter summers or colder ...

These planets, known as sub-Neptunes, are much bigger than the rocky planets in our inner solar system, but smaller than Neptune and other gas-dominated planets of the outer solar system.

According to researchers, the Sun will end all life on Earth due to increasing amounts of thermal energy that will "engulf" all inner planets of the Solar system, including our planet. According ...

NASA believes studying Uranus can help us better understand ice giant exoplanets in other solar systems. Webb's planet peeping is not limited to our own solar system. Webb captured its first image ...

As it grows, the Sun will emit increasing amounts of thermal energy, and will eventually engulf all inner planets of the Solar system, including Earth. This process means that our days on Earth are ...

Our solar system may have a ninth planet after all, following the declassification of Pluto nearly two decades ago, ...

An alternate explanation that fits the evidence is that Vesta was once part of a planet – but which planet that might been ...

During the birth of the solar system, the planets are thought to have formed and grown through a process known as core accretion, building themselves up by sweeping up rocky debris and adding mass ...

Pluto was reclassified as a dwarf planet in 2006. Our solar system may have a ninth planet after all, researchers say. The possibility that an additional planet may be hidden far into the solar ...