When and where will the total lunar eclipse be visible? We show who will have the best views and when you should watch.

The composite image shows seven of the solar system's planets from Earth, after sundown on Feb. 22. | Credit: Josh Dury A ...

The year 2028 will be the next opportunity to observe the asteroid as it returns to an observable distance for Earth-based ...

Reader Jayant Bhalerao, a college physics instructor, found the story useful in class: “We will share it with our students, so that they can appreciate how ...

With Mercury joining the show, all seven of Earth’s celestial neighbors will be present at dusk this week. By Katrina Miller Astute skywatchers may have already seen the striking line of planets ...

This he did with the help of a phenomenon called the Doppler effect: when a source of light approaches earth, its spectrum lines are shifted to the right, and when it is receding they are shifted ...