Over the past decade or so, astronomers have speculated about the characteristics of rogue planets in the Milky Way galaxy.

Astronomers have long speculated about an unseen planet lurking in the solar system's outer edge. This hypothetical world, dubbed Planet Nine, could explain the unusual clustering ...

For years, astronomers have been searching for a ninth planet in our solar system (after giving Pluto the old heave-ho and demoting it to a dwarf planet) and now researchers say they’ve found a ...

The possibility of additional planets in our solar system has been proposed many times ... Alternatively, perhaps it was a rogue planet picked up by the sun, maybe early in the history of the solar ...

Discover the order of planets in the solar system. From Mercury to Neptune, explore our solar system and learn more about our cosmic home. The solar system is our cosmic neighborhood, made up of ...

Some, called rogue planets, don't even orbit a star ... while not present in our solar system, is what NASA says is among "the most common type of planet known so far in the galaxy.” ...

Some, called rogue planets, don't even orbit a star ... while not present in our solar system, is what NASA says is among "the most common type of planet known so far in the galaxy.” ...