What’s it like on Venus?

SciShow Space takes you on a tour of Venus, a world with such an extreme environment that you might call it “Earth’s evil twin.”

Our New Galactic Neighborhood, and a Tar Comet?

SciShow Space shares the latest news from around the universe, including new insights into the giant supercluster of galaxies that we call home, and the first “data baby” from Rosetta’s rendezvous with a comet.


These are the depictions of the most intense meteor storm in recorded history – the Leonid meteor storm of 1833. The Leonid meteor shower is annually active in the month of November, and it occurs when the Earth passes through the debris left by the comet Tempel-Tuttle. While the typical rates are about 10 to 15 meteors per hour, the storm of 1833 is speculated to have been over 100,000 meteors per hour, frightening people half to death.
Here’s how Agnes Clerke, an astronomer witnessing the event, described it:  “On the night of November 12-13, 1833, a tempest of falling stars broke over the Earth… The sky was scored in every direction with shining tracks and illuminated with majestic fireballs. At Boston, the frequency of meteors was estimated to be about half that of flakes of snow in an average snowstorm.” (x)

How Much of Me Is “Star Stuff?”

Carl Sagan famously observed that we are all made of “star stuff.” But what does that mean? And how much of you is really made of dead stars? SciShow Space explains!

How Do We Measure the Distance of Stars?

It’s School of YouTube Week! Comic Relief and YouTube are partnering to send students to school! The Bad Astronomer Phil Plait teaches Hank how to measure the distance to the stars. 

Help more students learn by giving to Comic Relief.

The Smallest Star in the Universe

SciShow Space (with the special help of Phil Plait!) takes you to the smallest star in the universe, and explains how astronomers figured out that’s what it was!

Epic Meteor Adventure and Ozone Mystery

SciShow explores two celestial mysteries: the origins of a meteorite that crashed into a house in California, and who’s releasing chemicals into the atmosphere that were banned more than 25 years ago?

Stardust Discovery, and 2 Planetary Conjunctions

SciShow Space shares the latest developments from around the universe, including news about the first material ever collected from outside the solar system, and a backyard astronomers’ guide to two upcoming planetary conjunctions.

Quiz Show with Caitlin Hofmeister

Welcome back to Scishow Quizshow! In this episode Hank Green and Caitlin Hofmeister go head to head to compete for subbable subscribers.

The Supernova of 1054, Our Very Special “Guest Star”

All of humanity likely saw it, a brilliant supernova that lit up the daytime sky in 1054. But 960 years later, there’s still a lot we dont quite understand about the famous celestial phenomenon.