Planet hunters have grown used to strange worlds, but a handful of discoveries now point to something even more radical: giant planets that loop around their stars on orbits so skewed they almost defy ...

Pluto is a bit of a loner. The dwarf planet is no longer considered a regular planet; it does not orbit on the same plane as the solar system's eight planets; and its orbit is both highly elliptical ...

Simulations of asteroids near Venus reveal gaps in our ability to detect them. Astronomers are investigating a little-known and largely unseen group of asteroids that quietly orbit the sun alongside ...