Astronomy

Study of celestial objects, space, and the physical universe.

The Solar SystemStars and GalaxiesTelescopes and Tools
The Origin and Fate of the UniverseBlack Holes and Neutron StarsExoplanets and the Search for Life
Navigating by the StarsProtecting Earth from Space HazardsEveryday Technology from Astronomy
Breaking Down Big ConceptsObserving the Night Sky
The Solar SystemStars and GalaxiesTelescopes and ToolsThe Origin and Fate ...Black Holes and Neut...Exoplanets and the S...Navigating by the St...Protecting Earth fro...Everyday Technology ...Breaking Down Big Co...Observing the Night ...
Practical Applications

Protecting Earth from Space Hazards

Watching the Skies for Danger

Astronomy isn’t just about looking at pretty stars—it helps keep Earth safe! Astronomers track asteroids and comets that could come close to our planet. Early detection means we can prepare for, or even prevent, impacts.

How Do We Do It?

Powerful telescopes constantly scan the skies for “Near-Earth Objects.” If something big is heading our way, scientists can plan ways to deflect it or warn people in danger zones.

Real-World Impact

Monitoring space hazards is a vital part of protecting our planet and making sure we’re ready for anything out there.

Examples

  • Astronomers identified the asteroid Apophis and calculated its future paths to ensure it won’t hit Earth.

  • Space agencies run impact simulations and plan potential asteroid-deflection missions.

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Everyday Technology from Astronomy