Earth-like exoplanets (planets orbiting stars ... are all thought to have saltwater oceans buried under icy shells. Dwarf planets Pluto and Ceres are also suspected of having an underground ...

Opinions expressed by Forbes Contributors are their own. Jamie Carter is an award-winning reporter who covers the night sky. Computer simulations suggest that there is an undiscovered Earth-like ...

The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

Among the roughly 10 billion white dwarf stars in the Milky Way galaxy, a greater number than previously expected could ...

Red dwarfs are plentiful, and research shows that they host multitudes of planets ... on Earth and perhaps on other worlds." More information: Afonso Mota et al, How habitable are M-dwarf Exoplanets?

Stargazers will be treated to a rare seven-planet alignment in February. This is what scientists hope to learn.

The largest object is the asteroid belt is the dwarf planet Ceres ... other stars in the sky because it is much closer to Earth. But compared to other stars it is only of average size.

Charon is unusual because it is the largest moon in the solar system compared with ... a double dwarf planet system, not a planet and moon. Charon is smaller than Earth's moon.