Spaceflight covers topics related to human presence in outer space. Learn about weightlessness, astronauts and space tourism in this section.


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Can you sneeze in space?

You'd think so, wouldn't you? Journey into the past as the astronauts of the Apollo 7 mission tell us for sure.

How is GPS used in spaceflight?

GPS is great, but it's kind of Earth-centric. If we have our hearts set on traveling to distant planets and faraway stars, then it's time to come up with a new navigation system. NASA, of course, has an idea.

10 Offbeat Things Humans Have Launched Into Space

From sporting goods to movie memorabilia, members of the space program have been inventive about what they take into space. Here are 10 offbeat items that have taken the ride.

How is oxygen made aboard a spacecraft?

On Earth, we have a constant supply of fresh air. But what happens in the tiny, confined cabins of spacecraft, like the space shuttle or space stations? How is oxygen supplied to the people on board?

How is carbon dioxide eliminated aboard a spacecraft?

In the confined cabins of spacecraft, like the space shuttle or space stations, carbon dioxide, which is toxic, poses a problem for astronauts. Keep reading to see how that CO2 is eliminated.

Can you make your own homemade spacecraft?

Why should space agencies and private companies get to have all the fun of making and launching true spacecraft, or those that cross the Karman line? Can't the rest of us seize a little cosmic glory, too?

How do humans age in space?

Humans in space may age just a bit more slowly than the rest of us, but they also experience rapid muscle and bone mass loss. Why does this happen, and do astronauts recover?

Top 10 Moments in Space Bathroom History

When you think about space travel, you probably don't take the time to wonder how astronauts go to the bathroom. However, the annals of aeronautic history abound with tales of space bathroom mishaps. Here are 10 of our favorites.

5 Memorable NASA Mission Videos

NASA has conducted several successful missions to space. These are some of the most famous.

Are there military space stations out there?

It may sound like the stuff of science fiction thrillers, but military space stations were once very real. What seemed so tantalizing about a military presence in space?

How Elon Musk Works

Internet king turned rocketman? After making his fortune on the Web, Elon Musk entered the commercial space race. Will this businessman and his SpaceX company make space tourism affordable?

How will Blue Origin work?

Jeff Bezos made his fortune selling books online. So the next obvious step was to build rockets. Right? How does Blue Origin, Bezos' space travel company, stand up to the other commercial space racers?

How Sputnik Worked

A small aluminum ball that orbited the planet for three months in the 1950s had a profound influence over your life. If it hadn't, you wouldn't be reading this now.

How the Space Race Worked

The space race between the United States and the former Soviet Union began in the early 1950s. What followed was an era of cooperation between the United States, and now Russian, space programs with the building and operation of the International Space Station.

How the Google Lunar X Prize Works

Internet search giant Google is known for innovation. But now it's sponsoring the Lunar X Prize, in which private teams compete to land on the moon. Why?

What is it like to sleep in space?

When there are 16 sunsets every day, getting some shut-eye becomes a bit of an issue. Do astronauts get through it with some warm milk as they float?

Why do astronauts have to work out on the International Space Station?

Maybe Schwarzenegger had it right when he talked about the importance of pumping iron. Astronauts spend as long as four hours a day exercising. But why?

How Space Farming Works

There's no livestock in space farming, but growing plants in space could allow for long-term exploration and settlements. And with this farm, you don't need to watch where you step.

How the NASA Space Food Research Lab Works

In the 1960s, space food was either cubed or tubed, and it wasn't very appetizing. Today's astronauts have a more palatable array from which to choose. Where is it developed?

How Space Camp Works

Kids from around the world flock to Huntsville, Ala., to attend Space Camp. What's so appealing about science class in the summer, and can a 40-year-old go to camp?

How Spacewalks Work

When astronauts talk moonwalking, they don't mean the Michael Jackson dance move. Spacewalks take an entire day of preparation -- and a 240-pound space suit.

How Spaceports Will Work

If the future of tourism lies in outer space, then we'll need to blast off those amateur astronauts from somewhere. Compared to the average airport, how space-age will these spaceports be?

What is a gimbal -- and what does it have to do with NASA?

Believe it or not, to get to space and back, NASA relies on a piece of technology that's been around for centuries. Just what is a gimbal, anyway?

Will Humans Be Living in Space in the Next 50 Years?

These outer space abodes will have to protect inhabitants from extreme temperatures, radiation and flying moon dust. One man is actually selling deeds for lunar property at $20 a pop. Seriously?

Did NASA Win the Space Race?

This passive-aggressive peacetime contest between the USSR and the U.S. unofficially ended with the U.S. moon landing. But the Soviets also touted a long list of space race accomplishments. Who won?