The Great Debate 2010: Are We Alone?

[QuietIce]

Yes, however with light we can't jump up and come down. Are not some stars brighter and darker than others.

Stars, yes, (brown "stars" are virtually invisible) but we're not talking about stars, we're talking about galaxies and galaxy-sized gas clouds. As far as we know even those gas clouds are luminous and, of course, whole galaxies and quasars are very visible.

As far as "jumping", the experiments we've run concerning light, light speed, and other EM radiation are just as valid as jumping up and coming down - maybe even more valid. To some extent we understand how EM radiation works and how it's propagated, with gravity it's more like, "Well, this always seems to happen and these equations seem to always hold true" but until we find a graviton or have some other "proof" then our theories of EM radiation are just as valid as our theories of gravity - if not more so ...

 

[wingman99]

Stars, yes, (brown "stars" are virtually invisible) but we're not talking about stars, we're talking about galaxies and galaxy-sized gas clouds. As far as we know even those gas clouds are luminous and, of course, whole galaxies and quasars are very visible.

Yes and I was just making a comparison of intensity of light traveling through space.