Is Time Travel Possible? | NASA Space Place – NASA Science for Kids
Jan 20, 2026 · Although humans can't hop into a time machine and go back in time, we do know that clocks on airplanes and satellites travel at a different speed than those on Earth.
Glossary | NASA Space Place – NASA Science for Kids
Jan 20, 2026 · Light year: It’s not a year, or an amount of time at all. It’s the distance light travels in one year. It’s the same as 5,878,499,810,000 miles (or 9,460,538,400,000,000 meters). When things are …
Universe | NASA Space Place – NASA Science for Kids
Jan 20, 2026 · Eek! Airplanes and satellites can experience changes in time! Read on to find out more. It all depends on what the spacecraft will do! Read on to learn more. A transit is when one object in …
How Do We Launch Things Into Space? - NASA Space Place
Jan 20, 2026 · To stay in orbit, they must travel faster than a satellite orbiting farther away. The International Space Station orbits about 250 miles above the Earth and travels at a speed of about …
How Long is a Year on Other Planets? - NASA Space Place
Jan 20, 2026 · Why does NASA care about years on other planets? NASA needs to know how other planets orbit the Sun because it helps us travel to those planets! For example, if we want a …
Experiments | NASA Space Place – NASA Science for Kids
Jan 20, 2026 · Experiments All About the Moon explore The Space Place Experiment Center do How to lasso an atom Is Time Travel Possible? explore Printed Product Downloads explore
Voyager 1 and 2: The Interstellar Mission - NASA Space Place
Jan 20, 2026 · The pictures from Voyager 1 and 2 allowed us to see lots of things for the first time. For example, they captured detailed photos of Jupiter's clouds and storms, and the structure of Saturn's …
What Is a Gravitational Wave? - NASA Space Place
Jan 20, 2026 · Gravitational waves travel at the speed of light (186,000 miles per second). These waves squeeze and stretch anything in their path as they pass by. A gravitational wave is an invisible (yet …
Why Is the Sky Blue? | NASA Space Place – NASA Science for Kids
Jan 20, 2026 · Blue is scattered more than other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time. Closer to the horizon, the sky fades to a lighter blue …
Explore | NASA Space Place – NASA Science for Kids
Jan 20, 2026 · explore What Are the Moon’s Phases? explore Is Time Travel Possible? Airplanes and satellites can experience changes in time! Read on to find out more. explore What Is an Impact …