Now that we’re done with the planets, asteroid belt, and comets, we’re heading to the outskirts of the solar system. Out past Neptune are vast reservoirs of icy bodies that can become comets if they get poked into the inner solar system....

There’s no question that comets have been regarded as some of the most beautiful things in the night sky for thousands of years. But why are their heads often green but never their tails?

We've already learned a lot about the solar system, but sometimes the most fascinating things are what we DON'T know.

Learn about the Oort Cloud with host Reid Reimers on this episode of SciShow Space!

NASA's Opportunity had just made the most important discovery of its mission, the rock vein known as Esperance. But what happened next?

How big do you think our solar system is? Up until Pluto? A bit beyond? How big can other solar systems get? Astrum answers!

Remember those old space movies where spaceships had to maneuver through a bunch of asteroids scattered around and blocking the path of the ship? Well, that's not really true. The asteroid belt contains asteroids which are so far apart...

Our Sun and the collection of bodies that are bound to it by gravity.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig...

How comets change as they journey around the Sun, what are they made of and where are they found? Physics - Universe - Learning Points. Comets formed from dust and ice particles when the Solar System was very young. There are at least a...

This video examines details relating to the planets Uranus, Neptune and their moons. This video also looks at the dwarf planet Pluto and its moons, as well as comet formation in Kuiper Belt and Oort Cloud.

Remember those old space movies where spaceships had to maneuver through a bunch of asteroids scattered around and blocking the path of the ship? Well, that's not really true. The asteroid belt contains asteroids which are so far apart...

Evidence of the existence of a ninth planet in our solar system is unlikely to be a fluke, according to a pre-print of a California Institute of Technology study.<br/>

Follow Comet Siding Spring at #MarsComet



On October 19, Comet Siding Spring will pass within 88,000 miles of Mars – just one third of the distance from the Earth to the Moon! Traveling at 33 miles per second and weighing...

This video provides an overview of the Oort Cloud, a theoretical region located beyond our solar system and the Kuiper Belt. The video discusses the origins of the Oort Cloud, its spherical shape, and the potential disruption of its icy...

We know that there are lots of asteroids and comets in the solar system, and we've even landed a spacecraft on a comet, so we know a reasonable amount about these objects. However in 2017, something happened that had never happened...

NASA's Hubble Space Telescope observed the farthest-discovered active inbound comet, Comet K2. K2 came from the distant Oort Cloud and is visiting our inner solar system for the first (and only) time. Since we're seeing it so far...