Feb. 18 marks the 95th anniversary of the discovery of our outermost planet-not-planet. Here's what to know about the short ...
On the 95th anniversary of its discovery, Pluto remains one of the most beloved and enigmatic worlds in our solar system, ...
“New Horizons shattered a major paradigm of planetary science,” says Alan Stern, the mission’s principal investigator. “Pluto ...
That, plus Pluto’s small size—smaller than our moon—suggested that the ... solar system with an uncounted number of planets. Stern thinks the dwarf planet distinction is nonsensical ...
It did have five known moons: Charon, Nix ... Union General Assembly adopted a resolution to reclassify Pluto as a dwarf planet. The reasoning was that it didn't satisfy one of three newly ...
Saturn, Venus, Neptune, Uranus, Jupiter, Mars and Mercury will be visible in an uncommon planetary alignment this month.
A nearly new moon and mostly clear skies will present near ideal viewing conditions for the planet parade through Feb. 28.