For the trivia buffs out there, I present a challenge. I will give away a SpaceTalkNOW t-shirt to the first 10 people who can correctly answer my trivia question.

Which is brighter?

a) a full moon, or

b) two half moons

I’ll also include a mug for those who can go the next step and explain why.

Send your entry to and be sure to include your name.

Click here for terms

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