The Gravity of the Situation • episode "#7" • Crash Course Astronomy

Category: Astronomy

* Gravity is a Force * Different Types of Orbit * Escape Velocity * Weightless Mass

You might also like

Alien Planets Revealed

It’s a golden age for planet hunters: NASA's Kepler mission has identified more than 3,500 potential planets orbiting stars beyond our Sun. Some of them, like a planet called Kepler-22b, might even be able to harbor life. How did we come upon this distant planet? Combining startling animation with input from expert astrophysicists and astrobiologists, “Alien Planets Revealed” takes viewers on a journey along with the Kepler telescope. How does the telescope look for planets? How many of these planets are like our Earth? Will any of these planets be suitable for life as we know it? Bringing the creative power of veteran animators together with the latest discoveries in planet-hunting, “Alien Planets Revealed” shows the successes of the Kepler mission, taking us to planets beyond our solar system and providing a glimpse of creatures we might one day encounter.


Monster Black Hole

Black holes are the least understood places in the universe, where the rules of physics collapse. We go inside the supermassive black hole in the center of the Milky Way to uncover terrifying secrets about parallel universes, wormholes, and space-time.

43m • 2015 • How the Universe Works

Collision Course

Witness some of the most violent impacts in the universe, and meet the people protecting us from the fallout of these cosmic collisions.

47m • Extreme Universe

Hubble's Amazing Journey

The most amazing images of the universe captured by the space telescope, and a look at plans to launch a new and more advanced satellite in 2018. In this updated version of "Hubble's Amazing Journey” we reveal some of Hubble's latest observations: It has produced some of the most awe-inspiring images ever taken of the universe. But what is often forgotten about the Hubble Space Telescope is that after its launch 25 years ago it was originally labelled an embarrassing and expensive flop.

43m • 2016


Astronomers study a lot of gorgeous things, but nebulae might be the most breathtakingly beautiful of them all. Nebulae are clouds of gas and dust in space. They can glow on their own or reflect light from nearby stars. When they glow it’s usually predominantly red from hydrogen and green from oxygen, and when they reflect and scatter light it’s from massive hot stars, so they look blue. Stars are born in some nebulae, and create new ones as they die. Some nebulae are small and dense, others can be dozens or hundreds of light years across.

12m • 2015 • Crash Course Astronomy

Conquering the New Frontier

The possibility of a human civilization on Mars has seemed like a fantasy -- until now. We go behind-the-scenes at SpaceX, where Elon Musk shows us just how real this fantasy can be.

42m • 2014 • Mars: The Secret Science Series 1