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

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 .

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 ...

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.

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.

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.

The James Webb Space Telescope (JWST), operated by NASA, has uncovered intriguing new details about Charon—Pluto’s largest ...

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.

Pluto was demoted from a planet to a dwarf planet in 2006. ... it soon became apparent that Pluto was not big enough to exert the kind of gravitational pull necessary to influence Uranus' orbit.

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.