SciShow
How the First Stars Transformed the Universe
The first stars turned all the neutral hydrogen in the universe back into ions, created a bunch of new elements, and just generally made a mess. But without them, you wouldn’t be here.
SciShow
Great Minds of Astronomy: Cecilia Payne-Gaposchkin
Welcome to SciShow Space! In this episode Caitlin Hofmeister will talk about Cecilia Payne-Gaposchkin, one of the most influential women in astronomy!
Crash Course
Passing Gases: Effusion, Diffusion and the Velocity of a Gas - Crash Course Chemistry
We have learned over the past few weeks that gases have real-life constraints on how they move here in the non-ideal world. As with most things in chemistry (and also in life) how a gas moves is more complex than it at first appears. In...
Crash Course
Low Mass Stars
Today we are talking about the life -- and death -- of stars. Low mass stars live a long time, fusing all their hydrogen into helium over a trillion years. More massive stars like the Sun live shorter lives. They fuse hydrogen into...
SciShow
Strong Interaction: The Four Fundamental Forces of Physics #1b
Hank continues his primer on the strongest of the four fundamental interactions of physics, the strong interaction. Today he talks about the nuclear force and a force carrier called a pion.
SciShow
The Strange, Frictionless World of Superfluids
Imagine a cup of tea that doesn't obey the laws of physics, it pours out of the bottom of your cup while crawling up the sides to the top, and you'll have a pretty good picture of the ultracold phenomena of superfluids.
SciShow
The Hunt for the Highest Melting Point
What has the highest melting point known to us? Hank Green explains in this episode of SciShow.
SciShow
This Nebula Is Disappearing Absurdly Fast | SciShow News
Over just 20 years, the Stingray nebula has become anywhere from 29 to 900 times dimmer! It could teach us a ton about how nebulas evolve over time, and what happens when everything is going a lot faster than expected.
Bozeman Science
Strong Nuclear Force
In this video Paul Andersen explains how the strong nuclear force holds the nucleus together in spite of repulsive electrostatic charges acting on the nucleons. Mesons exchanged between nucleons keep the nucleus intact and gluons...
PBS
The Star at the End of Time
If we, or any conscious being is around to witness the very distant future our galaxy, what will they see? How long will life persist as the stars begin to die?
SciShow
We're Running Out of These Elements — Here's How
Phones, TVs, solar panels, and electric car batteries are all made of some rare and unusual elements. As our modern world creates more and more of these technologies, will things go from "rare" to "nonexistent" and what will we do then?
Crash Course
Ideal Gas Problems: Crash Course Chemistry
We don't live in a perfect world, and neither do gases - it would be great if their particles always fulfilled the assumptions of the ideal gas law, and we could use PV=nRT to get the right answer every time. Unfortunately, the ideal gas...
SciShow
Helium
Hank talks about everyone's favorite squeaky-voice gas and why it's important for more than party balloons.
TED-Ed
TED-Ed: Where did Earth's water come from? - Zachary Metz
Water covers over 70% of the Earth, cycling from the oceans and rivers to the clouds and back again. It even makes up about 60% of our bodies. But in the rest of the solar system, liquid water is almost impossible to find. So how did our...
Bozeman Science
Matter
Mr. Andersen gives a brief description of matter. The five states of matter are also discussed.
PBS
The Fate of the First Stars
Population III stars were the very first stars in our universe and far larger than any we can see today. Where are they now?
Bozeman Science
Electron Configuration
In this video Paul Andersen explains how to write out the electron configuration for atoms on the periodic table. More importantly he shows you why electrons arrange themselves in shells, subshells and orbitals by using Coulomb's law and...
Bozeman Science
PS1C - Nuclear Processes
Paul Andersen explains three major nuclear processes; fusion, fission, and decay. He begins with a brief discussion of the four fundamental forces in nature. He the explains how nuclei can be combined in fusion, divided through fission,...
TED-Ed
TED-Ed: Where does gold come from? - David Lunney
Did you know that gold is extraterrestrial? Instead of arising from our planet's rocky crust, it was actually cooked up in space and is present on Earth because of cataclysmic stellar explosions called supernovae. CERN Scientist David...
TED-Ed
TED-Ed: Radioactivity: Expect the unexpected - Steve Weatherell
Neutrons don't change into protons. Except, sometimes, they do. Radioactivity is the process under which the nucleus can change spontaneously from one element to another. Steve Weatherell suggests that we acknowledge both the usefulness...
Crash Course
The Sun
Phil takes us for a closer (eye safe!) look at the two-octillion ton star that rules our solar system. We look at the sun's core, plasma, magnetic fields, sunspots, solar flares, coronal mass ejections, and what all of that means for our...