Wednesday, January 08, 2014

the way-back machine

Stumbled across a wire item at Sky and Telescope.

"The Hubble Space Telescope has captured snapshots of never-before seen galaxies far, far away. Try 13.2 billion years ago." That's about 500 million years after the start of the Universe. At "z" or red-shift ratings of 9 to 10. They went on to say, "Astronomer Garth Illingworth of the University of California Santa Cruz said while most of the galaxies are dwarfs, some grew faster and are far brighter than predicted."

Found Illingworth's publications.


S&T said something strange, that the HST was "never supposed to see these clusters of baby stars." Huh? These aren't star "clusters" in the typical use of the word. I'm sure the HST did not resolve individual stars. More to the point, I'm not sure what they meant by not supposed to see. Are they referring to the magnitude? Distance? But some of these early galaxies are comparatively bright. No matter.

That's going way back!

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