Feeds

Hubble survey yields clues to galaxy formation

Theorists probably right, after all

5 things you didn’t know about cloud backup

Astronomers have uncovered more than 500 previously unknown young galaxies in images of the early universe taken during the Hubble Space Telescope's ultra deep field survey, completed in 2004, and the Great Observatories Origins Deep Survey (GOODS), made in 2003.

The young galaxies are approximately 13bn light years away, meaning they give us a glimpse of a time when the universe was less than seven per cent of its current age. Once the red-shift associated with expansion of the universe is accounted for, the galaxies appear very blue, indicating that they are teaming with stars being born.

Lots and lots of galaxies

The galaxies are much smaller than those we see in today's universe, and much dimmer. Rychard Bouwens from the university of California says this supports the theory that galaxies grew by merging with one another, building up over time.

So often with Hubble, the images returned confound astronomers, turning conventional wisdom on its head. And while this is fantastic for advancing the state of the science, the theorists must yearn for data like this, which suggests sometimes at least they have got it right.

The findings also provide evidence to support one explanation for the so-called reheating of the universe. This is a period in the universe's history after the Big Bang when the universe had expanded enough for the gas in between the stars to have cooled down. Astronomers had long debated how the gas was reheated.

"Seeing all of these starburst galaxies provides evidence that there were enough galaxies one thousand million years after the Big Bang to finish reheating the Universe," explained team member Garth Illingworth, also of the University of California. "It highlights a period of fundamental change in the Universe, and we are seeing the galaxy population that brought about that change." ®

Secure remote control for conventional and virtual desktops

More from The Register

next story
Boffins attempt to prove the UNIVERSE IS JUST A HOLOGRAM
Is this the real life? Is this just fantasy?
Our LOHAN spaceplane ballocket Kickstarter climbs through £8000
Through 25 per cent but more is needed: Get your UNIQUE rewards!
Software bug caught Galileo sats in landslide, no escape from reality
Life had just begun, code error means Russia's gone and thrown it all away
LOHAN tunes into ultra long range radio
And verily, Vultures shall speak status unto distant receivers
NASA to reformat Opportunity rover's memory from 125 million miles away
Interplanetary admins will back up data and get to work
SpaceX prototype rocket EXPLODES over Texas. 'Tricky' biz, says Elon Musk
No injuries or near injuries. Flight stayed in designated area
Galileo, Galileo! Galileo, Galileo! Galileo fit to go. Magnifico
I'm just a poor boy, nobody loves me. But at least I can find my way with ESA GPS by 2017
prev story

Whitepapers

Gartner critical capabilities for enterprise endpoint backup
Learn why inSync received the highest overall rating from Druva and is the top choice for the mobile workforce.
Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
Rethinking backup and recovery in the modern data center
Combining intelligence, operational analytics, and automation to enable efficient, data-driven IT organizations using the HP ABR approach.
Consolidation: The Foundation for IT Business Transformation
In this whitepaper learn how effective consolidation of IT and business resources can enable multiple, meaningful business benefits.
Next gen security for virtualised datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.