Rumya Sundaram, Citizen Scientist Coordinator for the Key Biscayne Community Foundation, will present this month’s Citizen ...

Rachel Feltman: For Scientific American’s Science Quickly, I’m Rachel Feltman. Unless you’re really on the low end of our listener age bell curve, chances are you grew up learning about our ...

There are eight official planets (sorry, Pluto) in our solar system: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and ...

A six-pack of planets will line up and light up the night sky this month, folks. Venus, Mars, Jupiter, Saturn, Uranus, and ...

As the gatekeepers to the Kuiper Belt, Charon and Pluto are a unique double dwarf planet system. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it ...

The potential discovery of a large planet beyond Neptune’s orbit could change everything we know about the Solar System.

A powerful new tool comes online this year that could help astronomers locate the mysterious planet hiding somewhere beyond ...

Planet X, also called Planet Nine, is a hypothetical planetary body seven times the mass of Earth lurking behind Pluto. If found, this gassy, icy beast some 155 billion miles away from the sun ...

NASA launched the New Horizons probe which would provide never-before-seen images of the dwarf planet, its moons and other objects.

Venus, Mars, Jupiter & Saturn, already visible to the naked eye, will be joined by Mercury, Neptune & Uranus in a rare ...