DIAGRAM OF THE DIFFERENT STARS: The Hertzsprung-Russel Diagram of star color and temperature. Courtesy of the European Space Agency and modified by the column author. The color of stars has been noted ...

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 ...

As interstellar object 3I/ATLAS approaches its closest point to the Sun next month, the mysterious visitor continues to ...

The cosmos, in its vast expanse, continues to reveal awe-inspiring mysteries. The latest of these enigmas is a color-changing ...