A star's color is determined by its temperature. Hotter stars appear blue; cooler stars appear red. Stars emit light across a range of colors, not just one. No star can emit only green light because ...

Temperature is a measure of the average energy of a collection of particles. (This is in contrast to kinetic energy, which is a measure of the energy carried by a single particle.) So, to answer a ...

(via minutephysics) If you take a piece of white paper into different lighting conditions, it will be an objectively different color in each situation, but our brains are clever enough to make us feel ...

There are several candidates for the biggest star in the universe. One of them, VY Canis Majoris, is over 1,500 times the ...

Most places on Earth have seasons because our planet is on a tilt as it orbits the sun. But our star also has its own version ...

Close out your week with a soothing view of the wonders of space, as provided by the Hubble Space Telescope. This week’s image from Hubble shows an enormous structure of stars called a globular ...