spacetoday.net: space news from around the webin association with SpaceNews

Astronomers find oldest galaxies in Hubble images
Posted: Thu, Dec 13, 2012, 6:17 AM ET (1117 GMT)
Ultra Deep Field 2012 image (STScI) Astronomers have found a population of galaxies more than 13 billion years old in a new "deep field" image set from the Hubble Space Telescope. The galaxies, found in Hubble's Ultra Deep Field 2012 (UDF12) near-infrared images, date back to between 350 and 600 million years after the Big Bang. Astronomers report that the images show the population of galaxies gradually decreases going back in time to about 450 millions years after the Big Bang, supporting models where "reionization," a reheating of cold hydrogen gas in the universe, took place gradually over the course of several hundred million years as the first galaxies formed. Astronomers used Hubble to take the UDF12 images with the telescope's Wide Field Camera 3 during August and September.
<<previous article   next article>>
news in brief
China launches circumlunar mission
Posted: Sat, Oct 25 10:39 AM ET (1439 GMT)

Russian cosmonauts speed through EVA
Posted: Thu, Oct 23 6:02 AM ET (1002 GMT)

news links
Saturday, October 25
SpaceX Plans to Start Reusing Rockets Next Year
Technology Review — 6:42 pm ET (2242 GMT)
SpaceX Dragon Comes Home After Space Mouse Delivery
NBCNews.com — 6:38 pm ET (2238 GMT)
S&T to co-host international Earth and Space Conference in St. Louis
Rolla (MO) Daily News — 6:31 pm ET (2231 GMT)


about spacetoday.net   ·   info@spacetoday.net   ·   mailing list