Do you know how many people have been to the moon? Only 12! Part of the reason it's so few is because of how difficult it is to escape Earth and get into space in the first place. In this episode of Crash Course Kids, Sabrina talks about...

Do you want to be an astronaut? Would you like to someday walk on the moon? Well, you better learn a little about gravity so you can escape from Earth and head into space. Today, Sabrina chats with us about what it takes to get to the...

Phil starts the planet-by-planet tour of the solar system right here at home, Earth. [10:14]

Now that we're done with the planets, asteroid belt, and comets, we're heading to the outskirts of the solar system. Out past Neptune are vast reservoirs of icy bodies that can become comets if they get poked into the inner solar system....

Offers a look at the downsides of slow space travel and how it might be possible for astronauts, using plasma-rocket technology, to make an "express voyage" to Mars in two weeks, rather than two-and-a-half years. [6:38]

The Parker Solar Probe is going to go closer to the sun than any spacecraft has come before. It will take seven years to fly 93 million miles to reach the sun's corona, its outermost atmosphere. The probe will withstand temperatures up...

Mechanical engineer, U.S. Air Force pilot, decorated war veteran, graduate of MIT with a PhD in Astronautics, Gemini 12 and Apollo 11 astronaut, inventor, Presidential Medal of Freedom awardee, author of books for children, teens and...

In this video from the Science and Technology Chat series, learn about astrobiology, an interdisciplinary field that uses biology, astronomy, and geology to study the origins of life on Earth and to search for possible life on other...

Astronomers have found a massive galaxy cluster that's making stars at a record pace.

This week, President Obama rolled out details of how changing budgets and changing priorities will affect NASA. We'll talk about the future of the agency, including plans for a larger role for private business in space flight.

Last week scientists reported definite signs of water hidden in darkened craters on the moon. Does that find change human plans for the exploration of space? Should it?

NASA plans to return humans to the moon by 2020, but a review committee is weighing other options.

In which we attempt to help one listener figure out the best tattoos to get to celebrate the history of space exploration.

The first privately built spacecraft could dock at the International Space Station this year.

We'll give you a heads-up on what to watch for in your summer stargazing.

Last week, two satellites collided in orbit around Earth. We'll check in on the after-effects of that collision, and talk about what the lingering debris from the crash means for future space missions.

Summer nights are made for stargazing. We'll get a guide to what to look for in the skies in the months ahead.

Last weekend, private space transportation company SpaceX successfully launched a payload into orbit. We'll talk with Elon Musk, the company's founder, about the launch of the Falcon 1 and what's next for the company.

The latest mission to Mars, Mars Phoenix, is scheduled to touch down on the Red Planet this coming Sunday. We'll talk about the mission and what the scientists behind it hope to achieve.

Discover what a cryobot is, and learn how engineers may one day use cryobots to explore frozen planets or moons.

Scientists announced this week that Voyager has finally reached interstellar space.

The non-profit B612 Foundation aims to build, launch, and operate the first privately funded deep space mission-a space telescope in orbit around the Sun that will map the inner Solar System in search of asteroids that could impact Earth.

After a successful cargo run to the space station, SpaceX is preparing the Dragon capsule for crew.

If Congress fails to act, some $15 billion will be cut from science funding in January 2013.