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→Contemporary Physics
*The universe is known to be expanding at an accelerated rate. Such acceleration requires energy, but the form and source of this [[dark energy]] is not well-understood.
*The universe is known to be expanding at an accelerated rate. Such acceleration requires energy, but the form and source of this [[dark energy]] is not well-understood.
*General relativity predicts the existence of gravitational waves, but none have been conclusively detected. Due to the weakness of the gravitational interaction, extremely sensitive detectors are required. The [[LIGO]] project is an example of current efforts to detect such waves.
*General relativity predicts the existence of gravitational waves, but none have been conclusively detected. Due to the weakness of the gravitational interaction, extremely sensitive detectors are required. The [[LIGO]] project is an example of current efforts to detect such waves.
===External Links===
*[http://www.relativitycalculator.com/models_universe.shtml Early Models of the Universe]
[[Category: Science]]
[[Category: Science]]
[[Category: Physics]]
[[Category: Physics]]