Pluto once held its place proudly as the ninth planet in our solar system,a distant, icy world on the edge of the cosmic frontier. But in 2006, everything changed. This in-depth explainer unpacks the ...

How big is 2017 OF201? The object is estimated to be around 700 kilometers (435 miles) in diameter, which is approximately half the size of Pluto. For more news like this visit The Economic Times .

How many dwarf planets are there in our solar system? The recent discovery of 2017 OF201 makes the tally anywhere between ...

When did Pluto stop being a planet, and why? Pluto was always in a tough spot when it came to being a planet. Just 1,477 miles across, it's only one-fifth the diameter of Earth.

If you could travel in a straight line at highway speed (approximately 60 mph or 100 km/h), the drive to Pluto, which is the outermost farthest-out dwarf planet that defines the edge of our solar ...

Planet X or not, Pluto existed. Smaller than the Moon, but inhabiting the realm of the giant planets, it defied our notions regarding the architecture of the Solar System.

Alison, is Pluto a planet? Alison Klesman, senior editor, Astronomy: To me, Pluto is not a planet — and that’s a sign of progress. ... Sometimes those differences are big, and sometimes not.

In this except from "Space Camp," a special series from NPR science podcast Short Wave, host Regina Barber delves into Pluto's demotion from planet to dwarf planet.

The Case for Pluto: How a Little Planet Made a Big Difference Alan Boyle, . . Wiley, $22.95 (258pp) ISBN 978-0-470-50544-1 ...

How big is the ellipse that our planet travels in a year around the Sun? ... (An eccentricity of 0 is a circle, while the dwarf planet Pluto has a relatively high orbital eccentricity of 0.244.