Visible light travels in electromagnetic waves, which we see as the colors of the rainbow. Different colors have different wavelengths of light. Violet and blue have the shortest wavelengths, whereas ...

This dark, moonless Friday the 13th evening is the perfect time to head out after dark and try to catch a glimpse of the zodiacal light. The ethereal, cone-shaped glow is actually the reflected light ...

The sky tells us a lot about what’s going to happen in weather. Last night’s sunset had a few strong hints as the chaotic sky developed. Sorry, I’m going to ...

The Moon reaches apogee, the farthest point from Earth in its orbit, at 5:46 A.M. EDT. At that time, our satellite will stand 251,996 miles (405,548 km) away. With the Moon sinking low in the hours ...

“What’s up in the sky?” is a recurring feature and publishes on the first of every month. You can find it on WTOP’s The Space Place. Email Greg your space questions and he might answer them in the ...

That bright "star" in the west after sunset is Venus, often called the "Evening Star". It will shine brightly for most of the ...

Venus is making a dazzling comeback, climbing into view above western skies, marking the beginning of her journey as an ...

March opens with one of the year’s most dramatic skywatching events: a total lunar eclipse that will turn the moon’s surface a ruddy red across large parts of the world. From there, the month features ...