The black is where we still need modern measurements at a reasonable resolution We've just become a little less ignorant about Planet Earth ... the creation of a full map of the ocean floor ...

A distinctive blue and green image of Earth reveals our planet's most remarkable features. At 4.54 billion years old, our home world is a venerable object. But it was only with the arrival of the ...

Jamie Carter is an award-winning reporter who covers the night sky. A planet’s opposition occurs when Earth passes between it and the Sun. As a consequence of that geometry, Neptune’s disk ...

Earth, our home planet, is a world unlike any other. The third planet from the sun, Earth is the only place in the known universe confirmed to host life. With a radius of 3,959 miles, Earth is the ...