The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...
Saturn, Venus, Neptune, Uranus, Jupiter, Mars and Mercury will be visible in an uncommon planetary alignment this month.
Mars, Venus, Jupiter and Saturn should be visible to the naked eye, but with a telescope you can spot Neptune and Uranus.
Planet demographics reveal a puzzling lack of worlds in a certain size range throughout the galaxy F or centuries our solar ...
According to an alternative model of how intelligent life emerges on planets like Earth, the existence of aliens—and human ...
On February 28, 2025, a rare planetary parade will occur, with all seven solar system planets aligned on one side of the Sun.
Feb. 18 marks the 95th anniversary of the discovery of our outermost planet-not-planet. Here's what to know about the short ...
Stargazers in parts of the U.S. have a fleeting opportunity this month to catch a rare celestial phenomena—a "parade" of ...