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Will the Universe End in a Big Rip?

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#104235 by @ 22.10.2007 00:00 - nach oben -
Will the Universe End in a Big Rip?

Explanation: How will our universe end? Recent speculation now includes a pervasive growing field of mysterious repulsive phantom energy that rips virtually everything apart. Although the universe started with a Big Bang, analysis of cosmological measurements allows a possibility that it will end with a Big Rip. As soon as few billion years from now, the controversial scenario holds, dark energy will grow to such a magnitude that our own Galaxy will no longer be able to hold itself together. After that, stars, planets, and then even atoms might not be able to withstand the expansive internal force. Previously, speculation on the ultimate fate of the universe centered on either a re-collapsing Big Crunch or a Big Freeze. Although the universe's fate is still a puzzle, piecing it together will likely follow from an increased understanding of the nature of dark matter and dark energy. A new APOD RSS feed is available here, or from the link line below.

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#104311 by @ 24.10.2007 08:01 - nach oben -
Phantom energy, dark energy? Wüsseschaftler...
#104333 by @ 24.10.2007 12:22 - nach oben -
Die dunkle Energie wird seit einigen Jahren in Astrophysik ernsthaft diskutiert. Sie wird für die Ursache der beschleunigten Expansion des Unversums vermutet und macht, gemäss Messwerten der Mikrowellenhintergrundstrahlung, ca. 75% der Gesamt-Energie des Universums aus.

Von phantom energy habe ich noch nie etwas gehört. Vielleicht ist das nur eine Synonym um den rätselhaften Charakter der dark energy zu unterstreichen.
#104335 by @ 24.10.2007 12:36, edited @ 24.10.2007 12:36 - nach oben -
Von der hab ich auch noch nie was gehört. Hat auch nur einen stub auf der englischen Wikipedia:

Phantom energy is a hypothetical form of dark energy with equation of state w < − 1. If it exists, it could cause the expansion of the universe to accelerate so quickly that the Big Rip would occur.

One application of phantom energy in 2007 was to a cyclic model of the universe.