For more than half a century, a Lonely Planet guidebook has been a backpacking bible, helping travelers find their way even ...

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 ...

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 ...

We have just entered a very favorable period for observing the so-called "elusive" planet Mercury. From now, until about May 13, you should be able to find it with not much difficulty. But how well do ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Dwarf planets are worlds that are too small to be considered full-fledged planets, but too large ...