WATCH: Neil deGrasse Tyson to commentate SpaceX's historic mission to ISS

The Demo-2 mission represents a new era for American spaceflight.

  • On Wednesday afternoon, SpaceX is set to become the first private company to launch humans into orbit.
  • The company's Crew Dragon, launched by the Falcon 9 rocket, is scheduled to take two NASA astronauts to the International Space Station.
  • Neil deGrasse Tyson will host the American Museum of Natural History's live-stream coverage of the launch.
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Tom Cruise is going to space to film an action movie

The 57-year-old is teaming up with NASA and SpaceX for the film project, which is to be set aboard the International Space Station.

Universal Pictures
  • NASA Administrator Jim Bridenstine confirmed the project on Tuesday via Twitter.
  • The project — an action-adventure movie — would be the first narrative film shot in space.
  • It's unclear how Cruise will get to the space station. Later this May, SpaceX and NASA plan to send American astronauts to the ISS aboard a SpaceX vehicle.
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Ask a NASA astronomer! Why is there zero gravity in space?

Astronauts aren’t floating in space, they’re free falling—and so are you. Here's the amazing science behind so-called zero gravity.

When we launched our 'Ask an astronomer' series with NASA's Michelle Thaller, one set of questions stood out from hundreds, arriving by way of the curious and clever students at Courthill Infant School, Poole, in the south of England. Representing all the aspiring scientists in Dragonflies Class, Joshua, age 4, asked NASA's Michelle Thaller a brilliant question: "Why is there no gravity in space?" Here, Thaller explains the incredible science behind why astronauts appear to float in space, which is an interesting misconception fuelled by the term 'zero gravity'. (In fact, there is a small amount of gravity found everywhere in space, which is why microgravity is a more accurate term.) So what are they doing if not floating? They're actually constantly free falling, says Thaller, and so are you, the person beside you, and the entire planet Earth. It's a high-velocity orbit that allows astronauts to seemingly defy gravity, soaring so fast around the planet that they remain suspended instead of succumbing to Earth's gravitational pull. Michelle Thaller explains the very cool science of how orbits allow astronauts to seemingly defy gravity. You can follow Michelle Thaller on Twitter at @mlthaller.

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Breaking the ice: How astronauts overcome their differences aboard the ISS

Think getting along with people that are nothing like you is hard? Here’s how astronauts do it, 254 miles above Earth on the ISS.

Look up—you can see the greatest feat of human cooperation orbiting 254 miles above Earth. As commander of Expedition 35 aboard the International Space Station (ISS), Canadian astronaut Chris Hadfield understands the difficulty of cultural barriers in team work, and the life or death necessity of learning to communicate across those divides. The ISS is a joint project between five space agencies, built by people from 15 different nations—and each of them has a different take on what is "normal". Hadfield explains the scale of cultural differences aboard the spaceship: "What do you do on a Friday night? What does "yes" mean? What does "uh-huh" mean? What is the day of worship? When do you celebrate a holiday? How do you treat your spouse or your children? How do you treat each other? What is the hierarchy of command? All of those things seem completely clear to you, but you were raised in a specific culture that is actually shared by no one else." Here, Hadfield explains his strategy for genuine listening and communication. Whether it's money, reputation, or your life that's at stake, being sensitive and aware of people's differences helps you accomplish something together—no matter where you’re from. Amway believes that ​diversity and inclusion ​are ​essential ​to the ​growth ​and ​prosperity ​of ​today’s ​companies. When woven ​into ​every ​aspect ​of ​the talent ​life ​cycle, companies committed to diversity and inclusion are ​the ​best ​equipped ​to ​innovate, ​improve ​brand image ​and ​drive ​performance. Chris Hadfield features in the new docuseries One Strange Rock and is the author of An Astronaut's Guide to Life on Earth: What Going to Space Taught Me About Ingenuity, Determination, and Being Prepared for Anything

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This is the damage a tiny speck of space debris can do at 15,000mph

Space is not the place to put waste, as it turns pretty much anything into a high-velocity projectile capable of causing incredible damage. 

Gravity, 2013

Space isn't as spacious as it should be; it's full of space debris, small amounts of scrap, trash, and machinery that humans have abandoned to Earth's orbit. The ISS has cataloged about 500,000 of these small pieces and they hurtle around our planet at about 15,000mph. Or 14.17 g-force. Or 24,140kph.

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