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Ohhhhh, gotcha! Thank you very much!

Could someone help explain the small-angle problem on the Northview Invitational? (The one with V838 Mon)
I don't really understand how they're getting a time of 2.8E7 seconds to calculate the distance...

Why do the rules say Antares/Rho Ophiuchi cloud complex? Are they supposed to be together or something...?

So I know that having notes about DSOs and equations is worthwhile, but what kinds of notes should we include on like H-R diagrams, spectra, light curves, etc. Is it worthwhile to just take a bunch of notes on those to have or just learn whatever you can and ctrl+f through a giant list of wikipedia ...

Another interesting problem from our regional's test, it's actually not too hard:
If you put 1 cent in a savings account, and it doubles every week, how many pennies will you have at the end of a year?

Where'd you find out that glaciers would be the topic for next year's dynamic planet and circuit lab would be back?

Can anyone walk me through the steps to construct an activity series from a series of redox reactions? I'm kind of lost...

Does anyone know or have a list of constants to memorize?

I've been using a college level physics textbook for a lot of my studying, but it doesn't really cover topics like the Visible Spectrum and Bright Line and Absorption Spectra

Does anyone have any good resources for the operating principles of optical equipment and learning pretty much anything for the Physical Optics part of the test?