A total solar eclipse will be visible from Texas to Maine on Monday. This cosmic event occurs when the Earth, sun, and moon align perfectly. One diagram shows how a total solar eclipse works, and why ...
These days, we are treated to glorious images of the cosmos through astrophotography and sophisticated three-dimensional visualizations of the universe. In the early centuries of astronomy, however, ...
Every few years, the sun seems to change its mood. Dark spots appear and ...