Friday in D.C. occupied a special spot between May Day and Derby Day, and seemed to rise to the atmospheric occasion. It ...

They are usually found at altitudes above 20,000 feet and are composed ... This scattering makes them look bright and white against the blue sky. However, clouds can appear gray or dark when ...

On Saturday, the sky above the District seemed to be about three things, each of them worthy of attention. They were rain, ...

Stargazers can see 10-20 Lyrid meteors per hour during its peak. This meteor shower also occasionally produces fireballs.