The ancient Greeks proved over 2,000 years ago that the Earth was round and figured out how big it was by using simple observations of the Sun. But how do people know this today? When you drop ...

The word “planet” came from the ancient Greek words that mean “wandering star.” That makes sense, because for thousands of years, people have watched planets change position in the night sky — unlike ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. NEW ORLEANS (WGNO) — Mercury, Venus, Mars, ...

Vahe Peroomian has received funding in the past from the National Science Foundation and from the National Aeronautics and Space Administration. The word “planet” came from the ancient Greek words ...

This article was originally published at The Conversation. The publication contributed the article to Space.com's Expert Voices: Op-Ed & Insights. Maggie Lieu, Research Fellow, School of Physics and ...

CHICAGO (WLS) -- As the kids get out of school and the summer plan is taking shape, why not challenge the family to get outside and learn? National Geographic helping you along the way. Allyson Shaw, ...