But long before the Pluto “controversy,” other objects moved on and off the official list of solar system planets. Indeed, a kindergartener in the early 1800s would have learned that Ceres was ...

First, we find out that Pluto isn’t really a planet. Then, we discover the existence of its long lost twin, Eris. And now, the plot thickens: “For the first time in over 150 years,” Batygin ...

In the cold, distant reaches of the Solar System, far beyond Pluto, astronomers have just identified what could be a new dwarf planet. It's called 2017 OF201, a rock that appears to be some 700 ...

Pluto Has Company . For 76 years, Pluto was considered the ninth planet of our Solar System, 3.7 billion miles from the Sun. What's more, for the first 62 years following its discovery in 1930 ...

Pluto is no longer the ninth planet in our solar system. It's only a "dwarf." Its fate was determined Thursday by the world's astronomers, who for the first time created a set of rules defining ...

Since its discovery in 1930, Pluto was heralded as the ninth planet in our Solar System. Pluto was the first world ever discovered beyond Neptune, and for nearly half a century, was the only world ...

Never before has a spaceship visited Pluto, which is the last member of the classical nine planets to receive an ambassador from Earth. ... Pluto flyby could unmask strangest solar-system citizen.

So, even without messing up things by adding another planet in the inner solar system, it’s possible that- it’s usually Venus and Mercury that become unstable in these long-term numerical ...

Before 2006 our solar system boasted nine planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto. Then the International Astronomical Union (IAU) laid out its three laws ...

Pluto was once considered one of the solar system’s planets but was later downgraded to the status of ‘dwarf’ planet after several more similarly sized objects were discovered throughout our solar ...

The Kuiper Belt, a region of the solar system past Neptune’s orbit, is likely home to hundreds of thousands — if not millions — of icy objects that vary in shape and size.Over 2,000 trans-Neptunian ...

NO, planets of our solar system, with or without Pluto, cannot fit within the mean lunar distance. An additional 3,500 km is needed to squeeze in Neptune (5,900 km to include Pluto).