spiral articles

Is every galaxy a spiral?

The universe is populated by countless island universes, each containing billions of stars, and while the iconic, pinwhe...

How does star formation differ in elliptical and spiral galaxies?

The character of a galaxy, from its shape to the color of its light, is deeply tied to its history of star formation. Wh...

How fast do spiral galaxies spin?

The sheer scale of spiral galaxies means that their component stars and gas clouds are moving at astonishing velocities,...

Is a spiral galaxy gas or dust?

A spiral galaxy is fundamentally a mixture of celestial components, not a simple choice between being only gas or only d...