Astronomers have found evidence for a planet 10 times more massive than Earth in the far outer solar system, orbiting about 20 times farther from the sun than distant Neptune does. "This would be ...

The solar system has four main regions. Small, rocky planets like the Earth orbit in the inner solar system, out to a distance of 4.2 A.U. (”astronomical unit,” the distance from Earth to the ...

Our Sun had a companion and there could be many undiscovered dwarf planets in the outer Solar System. That’s according to a new paper from scientists from Harvard University. Published today in ...

If there is a Planet Nine lurking in the outer reaches of our solar system, it was probably born close to the sun rather than snatched up from ... Planet Nine may not be from outer space after all.

Many of these near-match scenarios had the object zooming through the inner solar system, which prompted the researchers to add the terrestrial planets — Mercury, Venus, Earth and Mars — into ...

Each year Hubble snaps images of the outer planets of our solar system -- Jupiter, Saturn, Uranus, and Neptune -- to see how they are changing over time. Skip to main content Menu ...

In the remote outer reaches of planetary systems, far beyond the orbit of known planets, enormous and mysterious worlds silently loop around their stars. Some drift as far as 10,000 times the ...

A NASA Hubble Space Telescope observation program called OPAL (Outer Planet Atmospheres Legacy) obtains long-term baseline observations of Jupiter, Saturn, Uranus, and Neptune in order to ...

The solar system's group of outer planets include Jupiter, Saturn, Uranus, and Neptune. The Hubble Space Telescope takes photos of these planets annually. New Hubble Space Telescope Photos of the ...

Outer planets formed larger, attracting more material, including moons. ... The larger volume of space and lower gravity of the Sun in the giant-planet region allowed Jupiter, ...

While the outer planets (Jupiter and beyond) are predicted to remain gravitationally bound to the white dwarf Sun, the fate of the inner planets (Mercury, Venus, Earth, and Mars) is less certain ...