For a few evenings around 28 February, every planet in the solar system will be visible in the night sky, thanks to a rare ...
The ringed gas giant Saturn has officially replaced Jupiter as the planet in our solar system with the most moons. The ...
Uranus and Neptune, the most recently discovered planets in the solar system at the time, seemed out of sorts. Their orbits didn't add up mathematically, and Lowell was convinced there was an ...
But turning our nine-planet solar system into eight just earned Pluto more fans. This year also marks the 10th anniversary of Pluto's first dedicated flyby mission. NASA’s New Horizons ...