A new formation theory for Pluto's moon Charon could explain why Pluto is geologically active. Illustration incorporates NASA New Horizons terrain imagery. Pluto — demoted to dwarf planets status in ...

3.25 x 3.25 in. (8.3 x 8.3 cm.) ...

The planet Neptune wobbled in its orbit around the Sun. That could only mean one thing, astronomers said: There was a ninth planet out there, somewhere, lurking in the fringes of the solar system.

Astrologically, Pluto is regarded as the most intense and transformative planet. Though it’s an outer planet with an influence that is more so felt collectively, it governs power, regeneration and ...

Clyde Tombaugh discovered Pluto in 1930; however, in 2006, the International Astronomical Union (IAU) reclassified it as a dwarf planet, a decision sparking debate among astronomers and planetary ...

In the Feb. 23 issue of the journal Nature, a team led by Dr. Hal Weaver of the Johns Hopkins University Applied Physics Laboratory (APL) in Laurel, Md., describes its discovery of two new moons ...

Pluto pulled Adeene Denton into its orbit during her undergraduate internship at the Lunar and Planetary Institute in Houston. It was summer 2015, when the New Horizons spacecraft zoomed past the ...

We are less than two weeks away from the 95th anniversary of the discovery of Pluto, the ice-caked, rocky sphere orbiting ...

Flagstaff, AZ–The planet Pluto turns 75 this month. Clyde Tombaugh discovered the ninth planet in the solar system on the afternoon of February 18, 1930 while he meticulously examined a pair of deep ...