Parallel Worlds
“—Carl Sagan Parallel universes, dimensional portals, and higher dimensions, as spectacular as they are, require airtight proof of their existence. As the astronomer Ken Croswell remarks, "Other universes can get intoxicating: you can say anything you want about them and never be proven wrong, as long as astronomers never see them." Previously, it seemed hopeless to test many of these predictions, given the primitiveness of our experimental equipment. However, recent advances in computers, laser...s, and satellite technology have put many of these theories tantalizingly close to experimental verification.
Direct verification of these ideas may prove to be exceedingly difficult, but indirect verification may be within reach. We sometimes forget that much of astronomical science is done indirectly. For example, no one has ever visited the Sun or the stars, yet we know what the stars are made of by analyzing the light given off by these luminous objects. By analyzing the spectrum of light within starlight, we know indirectly that the stars are made primarily of hydrogen and some helium.MoreLess
Direct verification of these ideas may prove to be exceedingly difficult, but indirect verification may be within reach. We sometimes forget that much of astronomical science is done indirectly. For example, no one has ever visited the Sun or the stars, yet we know what the stars are made of by analyzing the light given off by these luminous objects. By analyzing the spectrum of light within starlight, we know indirectly that the stars are made primarily of hydrogen and some helium.MoreLess
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