It's coming. The sun is about to pull another disappearing act across the nation, turning day into night during April’s total solar eclipse.The entire thing will last up to 4 minutes and 28 seconds on ...

Amazon is offering 27% off the Celestron StarSense Explorer DX 130AZ. Perfect for watching Saturn's opposition on Sept. 20.

The first telescopes, known as refracting telescopes, were built in the early 17th century by Dutch eyeglass makers. They employed a pair of lenses—one convex fitted at the end of the scope, and one ...

The images, captured with the new Daniel K. Inouye Solar Telescope in Hawaii, reveal arcs of hot gas just 10 to 30 miles wide that follow the sun’s magnetic fields. Earlier instruments could only ...