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Space.

For some it's the ultimate frontier with (nearly) endless possibilities for exploration -- both manned and robotic. For others it's not worth the time and effort (and risk).

What are your thoughts? Should we invest more in earth science or deep-space telescopes? Who should be the next NASA chief? Does the Obama administration see the same emphasis on returning to the moon? What's out there?

Lots of questions, and I'll be hosting a live webcast on CBSNews.com starting at 1:00 p.m. EDT on Monday, May 11, so send your thoughts/queries to my Twitter account, Facebook, or post them here.

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Watch Daniel Sieberg host Space Shuttle launch Webcast, 1:00 p.m. Monday, May 11

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My guest during the webcast will be former shuttle program manager Wayne Hale, who will join us until about 1:50p. After that point, I'll stay online as we carry the live launch of Atlantis at 2:09p, as the crew is scheduled to rendezvous with the aging Hubble telescope and complete a slew of risky repairs.

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I won't even pretend to be an expert in photo microscopy. Sure, I loved microscopes in science classes, and I've dabbled in semi-professional photography over the years but mainly rock concerts and stage shows. But we're talking images of plankton at 400X magnification. That takes a whole different level of skill, understanding and squinting. So I was a little surprised when Nikon approached me to help judge their annual Small World competition. But I jumped at the chance.

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