[amsat-bb] REALY Old ...
clintbradford at mac.com
Wed Jan 6 14:25:31 PST 2010
Want to see something old? Check out what the Hubble program just released - shots taken last August that show galaxies between 12.9 and 13.1 billion years old. Considering the universe is probably about 13.5 to 14 billion years old, this is incredible.
(Insert your own "old age" joke here.)
Hubble used the newly installed Wide Field Camera 3, which allows it to see near-infrared wavelengths in the electromagnetic spectrum. This allowed the telescope to observe light from the very beginnings of the universe.This is because the expansion of the universe distorts the ultraviolet and visible light from these galaxies over the course of their unimaginably long journey, pushing them into near-infrared wavelengths.
These are some of the final images the Hubble will send back, as it's being replaced by the James Webb Telescope in 2014. Which is both sad an exciting, as the Hubble has shown us so much of the universe but the Webb will show us even more.
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