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 ...

Sedna will make its closest approach to the Sun in 2076, giving us a rare opportunity to visit the planetoid before it drifts ...

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 ...

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 ...

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 ...

Science. Goodbye to our Solar System as we know it: Astronomers confirm there is a new planet orbiting the Sun beyond Pluto Science. Extraordinary discovery in the animal kingdom: dolphins ...

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 ...

New Horizons discovered that Pluto is home to the largest glacier in the solar system, one measuring more than 386,000 square miles, or larger than Texas and Oklahoma combined.

Pluto belongs to a group of objects that distantly orbit the sun called the Kuiper Belt, where thousands of icy remnants left over from the formation of the solar system linger.