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Fraser
2006-Aug-04, 03:08 PM
A new space telescope concept has been chosen by NASA to help uncover the source of dark energy; the mysterious force accelerating the expansion of the Universe. Called Destiny, or the Dark Energy Space Telescope, the orbiting observatory would detect and observe more than 3,000 supernovae over the course of 2 years. This data will help astronomers trace back the expansion of the Universe, and calculate if the rate of acceleration has changed over time. If all goes well, it'll launch in 2013.

Read the full blog entry (http://www.universetoday.com/2006/08/04/dark-energy-mission-chosen/)

Jerry
2006-Aug-07, 01:32 PM
A great telescope, with great spectroscopic capability is a big plus, no matter what - even if they are barking up the wrong tree. Recent measurement of binary stars in M33 indicate that the Hubble constant is off by 15%. If this is confirmed, the universe is 15% larger at the distance at which 'dark energy' was invoked to explain the waning magnitudes of supernova. A recalibration could put dark energy back in Einstein's dumpster.

Spacemad
2006-Aug-08, 01:50 PM
Fraser:

Called Destiny, or the Dark Energy Space Telescope, the orbiting observatory would detect and observe more than 3,000 supernovae over the course of 2 years.


That's an awful big number of supernovae to detect in such a relatively short time, only 2 years!


If this is confirmed, the universe is 15% larger at the distance at which 'dark energy' was invoked to explain the waning magnitudes of supernova. A recalibration could put dark energy back in Einstein's dumpster.


The 15% deviation error observed could indeed do away with this mysterious "Dark Energy" that hasn't even been detected but was invented as a way to get around certain "problems" such as Jerry refers to.

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cmsavage
2006-Aug-09, 12:05 AM
The 15% deviation error observed could indeed do away with this mysterious "Dark Energy" that hasn't even been detected but was invented as a way to get around certain "problems" such as Jerry refers to.

I do not believe that is true. Dark Energy is used to explain non-linearity in the distance vs. velocity relationship of distant galaxies. A change to the Hubble constant would rescale all distance results by a constant factor, which would not remove this non-linearity.