You walk into your "office" and find that it is not not really an office at all, but just a space in the "research assistant dungeon". You get your own computer, and your own chair, and that's about it. Sigh. You'll have to lug your books around in your backpack now. You don't have anywhere to leave them... But it doesn't matter. It will be great to work here. You'll be surrounded by people doing interesting and you've already learned so much!

In addition to finding the size of the central star of HT Cas, you have also learned the following skills and concepts: