The dream of finding life on an alien Earth-like world is hampered by a number of technical challenges. Not the least of ...

With the exception of Pluto, planets in our solar system are classified as either terrestrial (Earth-like) or Jovian (Jupiter-like) planets. Terrestrial planets include Mercury, Venus, Earth ...

Beginning about 4.5 billion years ago ... eventually creating the four terrestrial planets (Mercury, Venus, Earth and Mars) and the four gas giants (Jupiter, Saturn, Uranus and Neptune), with ...

A planet 140 light-years from Earth is rapidly coming apart due to its close proximity to its star. The roasting planet is effectively evaporating away: It sheds an enormous amount of surface minerals ...