During a brief appearance on "The Late Show with Stephen Colbert" in 2017, Tyson said the Earth's moon has five times the mass of Pluto, and yet it's a "moon," not a planet. As per Tyson ...

(Correction: An earlier version of this story misstated how far Pluto is from the sun. The correct number is 3.7 billion miles.) What was discovered in Flagstaff, Arizona, and killed off in Prague?

The controversy endures over Pluto's true status, but the solar system underdog continues to capture hearts across the globe. Clyde Tombaugh didn't set out to discover Pluto when he sent his ...

Clyde Tombaugh discovered Pluto in 1930 at Lowell Observatory in Flagstaff. Here's how Pluto won - and lost - its planetary ...

In fact, Charon is so large compared to its host world that it and Pluto actually orbit a common center of mass (or "barycenter") that is outside the surface of Pluto itself. This peculiar mass ...

Pluto is in the Kuiper belt, a ring of bodies beyond the orbit of Neptune. It is made primarily of ice and rock and has only one sixth the mass of Earth's moon, and one third its volume.

If a person with a mass of 55kg was to travel to Jupiter or Pluto, the effects of gravity would be very different from those on Earth. Gravity is the pull that a planet exerts towards its centre.