Editor’s note: Welcome to Just4Kids, a new feature with content from The Conversation for Kids, a nonprofit in which scholars answer kids’ questions about science, health and more, that will be ...

For decades, the staggering cost of escaping Earth's gravity has limited our reach into space. Sending just one kilogram into orbit can run tens of thousands of dollars. Costs climb even higher for ...

There’s a reason why a rocket has to go so fast to escape Earth. It’s about gravity – something all of us experience every moment of every day. Gravity is the force that pulls you toward the ground.

There’s a reason why a rocket has to go so fast to escape Earth. It’s about gravity – something all of us experience every moment of every day. A SpaceX Falcon 9 rocket with its Crew Dragon capsule ...