True Detective is a masterclass in giving folks the heebie-jeebies. But, honestly, what sticks with most people? That spiral.

The Dark Energy Camera (DECam) has captured one of the most prominent spiral galaxies in the night sky in incredible detail in a new image. Messier 83, also known as the Southern Pinwheel Galaxy ...

Most spiral galaxies rotate at speeds proportional to the amount of visible matter, like stars and gas, they contain. The dark matter in these galaxies also contributes to the rotation speed.

Most spiral galaxies rotate at speeds proportional to the amount of visible matter, like stars and gas, they contain. The dark matter in these galaxies also contributes to the rotation speed. But the ...