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wolram
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http://www.astronomy.com/Content/Dynamic/Articles/000/000/001/604djcxv.asp
XMM-Newton studies the X-ray universe from Earth orbit.
ESA
A mystery that has been haunting the fields of physics and cosmology has just grown deeper. Dark energy, that stealthy ghost that lurks in the shadows of the universe, is now believed by most scientists to be a strange but significant occupant of the cosmos, an unidentified antigravity that is stretching the very fabric of space. In fact, all the evidence — beginning in 1998 with the discovery of the universe’s accelerating expansion — has added up to an unsettling cosmic recipe: 4 percent ordinary matter, 23 percent dark matter, and 73 percent dark energy. But now, a recent X-ray survey of distant galaxy clusters suggests that perhaps dark energy is not the secret ingredient after all
XMM-Newton studies the X-ray universe from Earth orbit.
ESA
A mystery that has been haunting the fields of physics and cosmology has just grown deeper. Dark energy, that stealthy ghost that lurks in the shadows of the universe, is now believed by most scientists to be a strange but significant occupant of the cosmos, an unidentified antigravity that is stretching the very fabric of space. In fact, all the evidence — beginning in 1998 with the discovery of the universe’s accelerating expansion — has added up to an unsettling cosmic recipe: 4 percent ordinary matter, 23 percent dark matter, and 73 percent dark energy. But now, a recent X-ray survey of distant galaxy clusters suggests that perhaps dark energy is not the secret ingredient after all
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