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Astronomers have spotted the most distant supernova ever seen.
Perlmutter's team took the lead last month, discovering what is probably the most distant supernova yet using the 10-meter Keck Telescope in Hawaii.
The hypothesis that these variations in intensity are caused by light being absorbed when passing through cosmic dust is no longer considered a viable explanation because the most distant supernova yet discovered is brighter than it should be if dust were the responsible factor (Sincell).
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The new observations, which include six of the seven most distant supernovae yet discovered, give the first glimpse of how a key property of dark energy is changing over time.
Some of the most distant supernovae recently observed appeared dimmer than expected.
Astronomer Jeff Cooke of Swinburne University of Technology near Melbourne, Australia, and colleagues have been searching for the most distant, ancient supernovae by examining images from the Canada-France-Hawaii Telescope atop Mauna Kea in Hawaii.
Hubble was able to spot the most distant Type Ia supernova – a type of exploding star believed to always have the same intrinsic luminosity.
In 1998, the High-Z Supernova Search and the Supernova Cosmology Project discovered that the most distant Type Ia supernovae appeared dimmer than expected.
Above: The remains of a distant supernova, captured by NASA's Spitzer and Chandra space observatories and the Calar Alto observatory in Spain.
"I went to a most distant place.
Cellphones already dominate the most distant outback.
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