repeat radially, like sun rays?

Hey guys, I know there's a quick and accurate way to repeat an image around a circle, like to create cartoony sun rays, but I don't know what it is off the top of my head. Can you help out? Something like:

http://www.astronomyedinburgh.org/publications/journals/48/figure2.jpg

p.s. I'm looking to not distort the rays, like I don't want them to be thinner in the middle and wider on the outside like in this tutorial:
http://designoahu.com/radials-rays-and-bursts

but rather just straight copying and pasting radially.

Thanks!