Sky This Week is brought to you in part by Celestron. Friday, July 11The Moon passes just 0.02° north of the dim, distant ...

The James Webb Space Telescope (JWST) has discovered that a hazy sky over frozen Pluto is helping to cool the dwarf planet's atmosphere, while at the same time giving methane and other organic ...

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

The unexpected discovery of the real-life celestial body Pluto in No Man's Sky by one explorer astonishes and impresses the player community.

This evening’s viewing challenge is the planet Mercury. It is less than half a fist above the west-northwestern horizon at ...

Over the past decade, researchers have been puzzling through Pluto’s mysteries. Meanwhile, the New Horizons probe heads for interstellar space.

Back to Article List The Sky This Week: Pluto reaches opposition Catch a distant dwarf planet and enjoy Last Quarter Moon from July 15 to 22.

Sedna, a distant dwarf planet three-quarters the size of Pluto, is inching toward the brightest star in our sky — and in 2076 ...

It confirmed the tiny planet harbored an ocean beneath its thick, icy shell. When did Pluto stop being a planet, and why? Pluto was always in a tough spot when it came to being a planet.

The James Webb Space Telescope (JWST) has discovered that a hazy sky over frozen Pluto is helping to cool the dwarf planet's atmosphere, while at the same time giving methane and other organic ...

Pluto was reclassified from a planet to a dwarf planet by the International Astronomical Union because it did not meet all three criteria of their updated definition of a planet.

This 2015 NASA image of Pluto combines blue, red and infrared images. In 2006, the International Astronomical Union demoted Pluto to one of dozens of dwarf planets.