Astronomy: New distance record for galaxies
Nature 502, 7472 (2013). doi:10.1038/502459a
Authors: Dominik A. Riechers
Spectroscopic measurements of 43 candidates for distant galaxies have confirmed one to be the most remote galaxy securely identified to date — and it forms stars more than 100 times faster than the Milky Way. See Letter p.524
Final word is near on dark-matter signal
Nature 502, 7472 (2013). http://www.nature.com/doifinder/10.1038/502421a
Author: Eugenie Samuel Reich
An influential US experiment prepares to release its first results.
A new image of the sunward plunging Comet ISON taken by NASA's
Hubble Space Telescope on October 9, 2013, suggests that the
comet is intact despite some predictions that the fragile icy
nucleus might disintegrate as the Sun warms it. The comet will
pass closest to the Sun on November 28.
On Thursday, October 17 at 4pm EDT there will be a live chat event with Hubble's comet scientists to discuss the new image and latest research findings on ISON. Visit: https://plus.google.com/events/c4te7qh2fo468ke9uou3e3rbr3s .
An international team of astronomers has found the most distant gravitational lens yet a galaxy that, as predicted by Albert Einstein's general theory of relativity, deflects and intensifies the light of an even more distant object. The discovery provides a rare opportunity to directly measure the mass of a distant galaxy. The observation also poses a mystery: lenses of this kind should be exceedingly rare. Given this and other recent finds, astronomers either have been phenomenally lucky or, more likely, they have underestimated substantially the number of small, very young galaxies in the early universe.