Sep 25, 2025 · 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.

Sep 25, 2025 · 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 …

Sep 25, 2025 · 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 …

Sep 25, 2025 · 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 …

Sep 25, 2025 · Image credit: NASA/University of Texas Center for Space Research GRACE detects tiny changes in gravity over time. These changes have revealed important details about our planet. For …

Sep 25, 2025 · But you’ll also need to figure out the best time to leave Earth to get to that planet. For example, Mars and Earth reach their closest distance to each other about every two years.

Sep 25, 2025 · 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

Satellites act like the stars in constellations—we know where they are supposed to be at any given time. The ground stations use radar to make sure they are actually where we think they are.

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Aug 11, 2025 · NASA science games, articles and activities for kids