An astronomy professor explains what exoplanets are, why he keeps looking for them and how Israel intercepts missiles “in ...

Since the 1990s, scientists have discovered approximately 6,100 planets outside our solar system, called exoplanets.

Astronomers have observed a planetary system that challenges current planet formation theories, with a rocky planet that formed beyond the orbits of its gaseous neighbors, possibly after much of the ...

Space is still the final frontier, and NASA has announced that the frontier is more vast than we realized. The NASA Kepler mission has discovered 715 planets set up in multiple-planet systems a lot ...

The official number of planets outside our solar system has reached 6,000, according to space scientists. NASA's tally of exoplanets does not include more than 8,000 additional candidate planets ...