On the (https://github.com/explore/week) page, my repo's been on top of weekly list for a while now, and today, I started seeing a star next to it.
http://i.imgur.com/0q7JCYU.png
Not on any other repo, and only in the weekly listing. Hovering over the star, I see this:
http://i.imgur.com/GilEHdt.png
What does this star mean, and why is this there??