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What is the smallest star in the universe, and where is it?  
How do supermassive black holes form at the centers of galaxies? 
How did Olympus Mons get to be so tall? Is it because the gravity on Mars is weaker than that on Earth? 
Does Titan have the requirements to support life?  
Is there a plan to retrieve the Hubble Space Telescope from space to preserve it in the Smithsonian Institution or elsewhere for future generations to appreciate? 
Will the galaxy M33 be involved in the merger between our Milky Way Galaxy  
Is it possible for a large star to collapse itself out of existence rather than just forming a black hole? 
Will the Messenger probe to Mercury be able to get a photograph of the asteroid Icarus? 
I have a 70-millimeter refracting telescope. Would a scope with a larger diameter make objects look bigger or closer? 
Does flying in a plane underneath the aurora expose a person to radiation? Would it be dangerous? 
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