Scientists estimate as many as 400 billion stars may exist in our galaxy alone. As part of a larger physics series, an out-of-this-world video introduces five amazing stars. Each star holds the record in something!

NASA tracks around 20,000 pieces of debris orbiting Earth. The garbage humans leave in space cause problems for space exploration, satellites, and communication. One group of scientists hopes to clean up the junk and make this planet...

Mr. Khan works through the equations that he derived in previous videos. In this fourth video of in a series of five, he uses an equation that he created himself.

This lecture continues the calculations involved in deducing the number of possible detectable civilizations. The main subject is a comparison of the traditional Drake equation and the calculations made in the previous videos in this...

Sal outlines a framework for detecting possible civilizations in our universe. He considers the number of stars and uses the requirements for civilizations to derive the number of potentially suitable planets. The Drake equation can help...

What are space dust bunnies and why are they important to us? Pupils explore space dust bunnies and how these particles helped form the planets. To understand the phenomenon, class members investigate the chemistry behind dust particles...

What are the characteristics of Pluto? After many years, scientists are finally gaining knowledge about Pluto's surface. Using an exciting video from the SciShow Space series, learners investigate Pluto's surface by viewing images that...

How does one become an astronaut? Astronaut Joe Acaba discusses his journey to space in a video from the "STEM on Station" series. He encourages learners by explaining how little moments in his life led to his opportunity to explore...

How did the planets form? An interesting video from the SciShow Space series identifies the differences between the inner and outer planets and how the history of the solar system's sun put everything in its place. Viewers also learn...

What do people really know about the moon? Learn about three unsolved moon mysteries: the moon's past magnetic field, lunar sunrises, and what's really inside the moon's craters. An engaging video from the SciShow Space series connects...

What were the first living things to travel to space? Long before humans went into orbit, scientists sent animals into space to see how space exploration would affect living things. Viewers of an interesting video learn about how animals...

Can humans really live in space? Which elements and compounds are essential for life? An informative video explores the concept of mining asteroids for important chemicals needed to support life in space. Viewers then identify the...

One of the most important events in space exploration history has some secrets! Using an informative video, scholars discover all of the details of the first humans landing on the moon. The narrator shares the details of the mission, why...

Space stations provide opportunities for space exploration and research. Individuals see how scientists build space stations and put them into space. Viewers explore the history of space stations, the different types of space stations...

Have scholars ever wondered what a black hole looks like? See the first image of a massive black hole and learn about what a black hole is, how it forms, and how telescopes took images from around the world. The video then relates the...

What is a black hole? Individuals hear a detailed explanation about what a black hole is, how it forms, and how it effects light and matter. The characteristics of a black hole determine the image it produces in telescopes, and...

The brightest and densest protocluster ever observed by scientists makes that area the most active region of space. Learn about the area and the formation of galaxies before our eyes as part of the SciShow Space series. Hank Green also...

Space and dogs—two great ways to get young listeners interested in a story! A two-part audiobook features a tale about a dog named Bonzo and his astronomical adventure through outer-space.

Prepare to be amazed! Look deep into the darkest part of the night sky, courtesy of a video from a vast physics playlist. Young astronomers see hundreds of galaxies through the eye of the Hubble Telescope. 

Imagine living in a neighborhood where the houses on your street keep moving farther away until your house is the only one in the reachable vicinity. That's what is happening in our universe, except your house is our galaxy, and the...

Can we journey to outer space to learn more about inner Earth? Discover the method to NASA's madness with an enlightening short video. The narrator explains the composition of the asteroid the resource is studying, what scientists hope...