Astronomers have discovered that "super-Earth" planets may exist on wider ... but still less than the masses of gas giant planets. The discovery came after a small extrasolar planet, or "exoplanet ...

NASA scientists have for years sought to understand the gas giant, whose mass is more ... from an altitude of about 36,000 ...

More precise rotational time observations of the gas giant should enable scientists to plan visits to investigate it. Unlike on Mars and Earth, savage windstorms make it far more difficult to ...

NASA scientists have for years sought to understand the gas giant, whose mass is more than ... Though Io is not much larger than Earth's own moon, the two celestial bodies couldn't be more different.