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View Full Version : GALEX Confirms Nature of Dark Energy



Fraser
2011-May-19, 05:20 PM
From a JPL press release: A five-year survey of 200,000 galaxies, stretching back seven billion years in cosmic time, has led to one of the best independent confirmations that dark energy is driving our universe apart at accelerating speeds. The survey used data from NASA’s space-based Galaxy Evolution Explorer and the Anglo-Australian Telescope on Siding [...]

More... (http://www.universetoday.com/85816/galex-confirms-nature-of-dark-energy/)

profloater
2011-May-19, 05:25 PM
Dark energy is called a "constant force" in the paper. Would it be more accurate to call it a constant pressure?

Noclevername
2011-May-19, 05:50 PM
Dark energy is called a "constant force" in the paper. Would it be more accurate to call it a constant pressure?

Not without knowing more-- or even anything-- about the actual mechanism by which it works. For instance, it could be dragging masses apart rather than pushing them.