When you think about stars twinkling overhead, you probably don’t associate them with a color. But the star Sirius shifts through every color of the rainbow. That effect is thanks to the same ...

Sirius is the bright star on the far left of this photo taken during an Adirondack mountain camping trip in February. A camper's flashlight traces his path in this time exposure. (Patrick Rowan photo) ...

The color of stars has been noted from antiquity and the names of many stars reflect their visible color. The red Antares is the heart of the scorpion. The brightest star Sirius is derived from the ...