Out in the vast coldness of outer space, there are planets that travel alone through darkness without the boundaries of a system. Here's how this can happen - and why these frozen deserts might secretly harbor alien life. The video "Aliens under the Ice - Life on Rogue Planets" is a resource included in the Space sciences topic made available from the Kurzgesagt open educational resource series.

Are you alone? To answer this question we have to take a look what "you" are first. What are you made of and where you stand in this universe. Are you your body? Your atoms? And how are your parts connected to the big picture? The video "Are You Alone? (In The Universe)" is a resource included in the Space sciences topic made available from the Kurzgesagt open educational resource series.

The video "The Black Hole Bomb and Black Hole Civilizations" is a resource included in the Space sciences topic made available from the Kurzgesagt open educational resource series.

Black holes. Lets talk about them. The video "Black Holes Explained - From Birth to Death" is a resource included in the Space sciences topic made available from the Kurzgesagt open educational resource series.

Humans love to explore. Strangely enough even horrible places - like Mars. Let's see how building a Mars base could work and how insanely nerve-wracking exactly it would be. The video "Building a Marsbase is a Horrible Idea: Let's do it!" is a resource included in the Space sciences topic made available from the Kurzgesagt open educational resource series.

There are cosmic snipers firing at random into the unvierse. What are they and what happens if they hit us? The video "Death From Space -Gamma-Ray Bursts Explained" is a resource included in the Space sciences topic made available from the Kurzgesagt open educational resource series.

Einstein's Messengers is an award-winning, 20-minute documentary on LIGO, NSF's Laser Interferometer Gravitational Wave Observatory. The video examines how LIGO is spearheading the new field of gravitational wave astronomy and opening a whole new window on the universe. It explains how LIGO's exquisitely sensitive instruments may ultimately take us farther back in time than we've ever been, catching, perhaps, the first murmurs of the universe in formation. Above all, Einstein's Messengers is a compelling, thought-provoking production about the drama of the scientific quest.

Space travel is the most exciting adventure for humanity, but in an irony of history we may stop ourselves from going into space the more we do it. With every rocket launched we are creating a deadly trap for mankind. The video "End of Space - Creating a Prison for Humanity" is a resource included in the Space sciences topic made available from the Kurzgesagt open educational resource series.

Planet Earth is this solid thing you are standing on right now. In your everyday life you don't really waste a thought about how amazing this is. A giant, ancient, hot rock. How did it come into existence and how big is it really? You will be surprised. The ground you are standing on is just a very, very small part of the big picture. The video "Everything You Need to Know About Planet Earth" is a resource included in the Space sciences topic made available from the Kurzgesagt open educational resource series.

Where are all the aliens? The universe is too big and too old, why have we not met aliens yet? Do they live in computers? Were they wiped out by an ancient super intelligence? Or are we just to primitive to understand their motives? Whatever the answer is, it is incredibly important for our own future. The video "The Fermi Paradox II -Solutions and Ideas - Where Are All The Aliens?" is a resource included in the Space sciences topic made available from the Kurzgesagt open educational resource series.

The universe is unbelievably big - trillions of stars and even more planets. Soo… there just has to be life out there, right? But where is it? Why don't we see any aliens? Where are they? And more importantly, what does this tell us about our own fate in this gigantic and scary universe? The video "The Fermi Paradox -Where Are All The Aliens? (1/2)" is a resource included in the Space sciences topic made available from the Kurzgesagt open educational resource series.

The Moon might be much bigger than you think it is. The video "How Big is the Moon? MM#1" is a resource included in the Space sciences topic made available from the Kurzgesagt open educational resource series.

Is there a border we will never cross? Are there places we will never be able to reach, no matter what? It turns out there are. Far, far more than you might have thought. The video "How Far Can We Go? Limits of Humanity." is a resource included in the Space sciences topic made available from the Kurzgesagt open educational resource series.

Did you know that we could start building a Lunar Base today? The video "How We Could Build a Moon Base TODAY - Space Colonization 1" is a resource included in the Space sciences topic made available from the Kurzgesagt open educational resource series.

If humans want to expand into space, it will take us incredible amounts of energy. How do we do that? Easy: we will just use the sun's energy by realizing the most ambitious construction project in history. This is how it works. The video "How to Build a Dyson Sphere - The Ultimate Megastructure" is a resource included in the Space sciences topic made available from the Kurzgesagt open educational resource series.

If Neptune didn't catch Triton we might have another Dwarf Planet in our Solar system - maybe even another Planet or double system. We show how this could have happened. The video "How to catch a Dwarf Planet - Triton MM#3" is a resource included in the Space sciences topic made available from the Kurzgesagt open educational resource series.

Everything will end. Even the universe. But in a future so far away that it defies description, there will still be light and therefore a chance for life. It will be around White Dwarfs, the corpses of stars. But even they will fade one day. The video "The Last Light Before Eternal Darkness - White Dwarfs & Black Dwarfs" is a resource included in the Space sciences topic made available from the Kurzgesagt open educational resource series.

The last star in the universe will be a red dwarf. Red dwarfs in general might be great places to look for aliens - or planets for humans to find a new home after our solar system has died. The video "The Last Star in the Universe - Red Dwarfs Explained" is a resource included in the Space sciences topic made available from the Kurzgesagt open educational resource series.

What do you know about the Moons of Mars? Nothing? They are super cool (and strange), promise. The video "The Moons of Mars Explained - Phobos & Deimos MM#2" is a resource included in the Space sciences topic made available from the Kurzgesagt open educational resource series.

What if there is a way to destroy the universe so fundamentally that life as we know it will be impossible forever? The video "The Most Efficient Way to Destroy the Universe - False Vacuum" is a resource included in the Space sciences topic made available from the Kurzgesagt open educational resource series.