An international research team has discovered a new planet so young that it has yet to emerge from the womb of matter where it is forming. This is the youngest protoplanet discovered to date. It’s ...

When a distant planet appears as a point of light in a telescope, it's hard to imagine what things are like at the surface. Does rain fall? Is the atmosphere thick, or dissipating into space? How ...

A new study suggests yet another theory for a possible extra planet in our solar system, likely of a size between Mercury and ...

Our solar system is our immediate cosmic neighborhood. We know it well: the sun at the center; then the rocky planets Mercury, Venus, Earth, and Mars; and then the asteroid belt; followed by the gas ...

A highly stylized rendition of our solar system NASA/JPL If someone asked which planet was closest to Earth, you’d be pretty certain — it’s Venus. We measure distances in the solar system in terms of ...

Finding exoplanets these days has become blasé, yet taking an image of one remains exceedingly difficult. So difficult that, of the thousands of exoplanets discovered, only a handful have been found ...

Researchers at Penn state have developed a new method for calculating the habitable zone around stars. The computer model based on new greenhouse gas databases provides a tool to better estimate which ...