Now, a group of scientists says Pluto should definitely be added back to the planet list — oh, and that there are over 100 other objects in our solar system that should also be called planets.

Now, a group of scientists says Pluto should definitely be added back to the planet list — oh, and that there are over 100 other objects in our solar system that should also be called planets.

An IAU working group is being set up to decide whether any other objects qualify for the dwarf planet list. Other Pluto-like objects, such as 2005 FY9, will be considered for membership, Spahr says.

A new analysis of exoplanets has shown interstellar contamination from nearby stars could change where to search for ...

The planets named today have been found over the past 23 years in 19 distant star systems. Some of the stars in those systems – for example, Fomalhaut – already have proper names.

The planet 2M0437b is about 400 light-years from us and lies about 100 times the Earth-Sun distance from its parent star. That huge distance makes it easier than usual to observe.

Abraham ben Meir Ibn Ezra, a medieval astrologer, wrote "The Beginning of Wisdom" in 1148 A.D. as a basic introduction to astrology. In it, he wrote, "A planet about to turn retrograde is like a ...

Do we inhabit the best of all possible worlds? German mathematician Gottfried Leibniz thought so, writing in 1710 that our planet, warts and all, must be the most optimal one imaginable.