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Is Time Travel Possible? | NASA Space Place – NASA Science for Kids
Jan 20, 2026 · The Short Answer: 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. …
What Is a Satellite? | NASA Space Place – NASA Science for Kids
Jan 20, 2026 · What do you think of when you hear the word “satellite”? Maybe you think of a big metal spacecraft that circles our planet in space.