Earth | Page 3 of 14 | Astronomy.com

How has Earth’s core stayed as hot as the Sun’s surface for billions of years?

The sky isn’t just blue — airglow makes it green, yellow, and red too

Best images of Earth as seen from space in 2022

How Earth’s tilt creates short, cold January days

Fiber optics help scientists take the pulse of our planet

Where did Earth’s oxygen come from? New study hints at an unexpected source

Human Spaceflight, Solar System

What Earthly objects can be seen from space?

Robotic Spaceflight, Solar System

Lucy captures portrait of Earth and Moon on trip to Trojan asteroids

Why does Earth have continents?

Earth’s greatest hits: A history of asteroid impacts

Milky Way, Solar System

Earth’s path through the Milky Way traced via tiny crystals found in the crust

Ask Astro: How quickly is the Moon moving away from Earth?