The lunar terminator, the sunset/sunrise line that sweeps across the Moon’s surface as the Moon orbits Earth, travels at a rate of 9.6 mph (15.4 km/h) along our satellite’s equator. Taking the average ...

Binoculars are clearly the greatest invention ever bestowed upon the naturalists of the world. Before binoculars, our knowledge of many birds was vague to nonexistent. Now anyone can pluck distant ...

Six of Earth’s neighboring planets are about to come into view at once — here’s how to use optics to get the most from the ...

Spring means it’s time to look up into our night sky and find one of the oldest objects in our galaxy: the M3 Cluster. NASA and other sky experts call this group of ancient stars “a truly distant ...

Go outside right now. What’s the farthest thing you can see? A tree? A bird? What about the Moon? It’s 250,000 miles away. The Sun is 400 times farther than that, at nearly 100 million miles (but ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. I’m the world’s only “eclipse journalist.” For the very ...

A solid set of binoculars will drastically enhance any outdoor experience. Sure, they’re an essential piece of equipment for ...

We've tested many image-stabilized binoculars — here's our expert verdict on whether you should bite the bullet and buy a pair or go with regular binoculars for stargazing. When you purchase through ...

The practice of using a device to project an image of the Sun is thousands of years old. But if using a pinhole doesn’t give the image quality you want, then try this project. The final image will ...