Every star you see at night broadcasts its temperature through color, yet one shade sits permanently off the menu. The visible spectrum runs from deep red through orange, yellow, white, and blue, each ...

Professional and amateur astronomers post amazing photos of the sky. A colorful, star-filled Milky Way is often shown rising above a landscape, and photos from the Hubble Space Telescope reveal ...

One of the largest stars close enough for us to estimate its size, WOH G64, appears to have gone from red to yellow in 2013-14, indicating a temperature rise of about 1,000°C (1,800°F). Last year it ...

This month, we’ll talk about the relationship between a star’s spectral class and its color. But first, I have a question for you: Which constellation has the most stars of spectral class K9? The ...