Featured Research

from universities, journals, and other organizations

Searching for the first stars

Date:
February 28, 2012
Source:
Kavli Foundation
Summary:
How did the first stars and galaxies bring the young universe out of its dark ages and into the light? Three prominent researchers discuss how new instruments and observational techniques may find the answer.

This artist's concept shows what the very early universe might have looked like, just after its first stars began bursting onto the scene.
Credit: NASA/JPL-Caltech/R. Hurt (SSC)

Recently, astronomers found two immense clouds of pristine gas, nearly 12 billion light years away -- clouds that astronomers suspect are the stuff from which the first stars were born. The Kavli Foundation spoke with three prominent researchers about this and other exciting findings that are moving scientists closer to understanding how the first stars and galaxies formed. This includes the realization that in early times, there were many more small, feeble galaxies than large luminous galaxies.

Related Articles


"If you were to take a space ship and go back to that point in cosmic time, you'd find that the sky is really ablaze with them -- so many of them that their combined output is very significant," said Richard Ellis, Steele Professor of Astronomy at the California Institute of Technology. "These early objects are in fact very, very small -- about a tenth the diameter of the Milky Way. And yet, they are forming stars more prodigiously than the galaxy we live in today."

Discoveries such as these come as scientists focus on studying the gaseous "fingerprints" the early galaxies left on their surroundings -- what's called the intergalactic medium (IGM). "We know from these observations that after about one billion years all of this gas is ionized, and it's the galaxies that we think did this," said George Becker, Fellow, the Kavli Institute for Cosmology at the University of Cambridge. "The question that we are trying to answer is how and when it happened, and what these earliest galaxies were like."

Said Avi Loeb, Chair of the Department of Astronomy and Director of the Institute for Theory and Computation, Harvard University, "If we can map the distribution of galaxies and the hydrogen gas between them, in the IGM, we can see the relationship between the places where the galaxies are and the regions that were ionized… [This] gives us indirect evidence for the earliest galaxies. This new technique will enable us to directly study the galaxies that ionized that hydrogen gas."

And what do researchers ultimately hope to uncover?

"[We] would like to understand how the galaxies that we see around us, including the Milky Way, came into existence," said Loeb. "It's going back in time to our origins, in a sense. Religious texts try to address these questions, but now we are able to come up with a scientific version of the story of Genesis."

For the full discussion visit: http://www.kavlifoundation.org/science-spotlights/searching-first-stars


Story Source:

The above story is based on materials provided by Kavli Foundation. Note: Materials may be edited for content and length.


Cite This Page:

Kavli Foundation. "Searching for the first stars." ScienceDaily. ScienceDaily, 28 February 2012. <www.sciencedaily.com/releases/2012/02/120228185830.htm>.
Kavli Foundation. (2012, February 28). Searching for the first stars. ScienceDaily. Retrieved November 27, 2014 from www.sciencedaily.com/releases/2012/02/120228185830.htm
Kavli Foundation. "Searching for the first stars." ScienceDaily. www.sciencedaily.com/releases/2012/02/120228185830.htm (accessed November 27, 2014).

Share This


More From ScienceDaily



More Space & Time News

Thursday, November 27, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

NASA's First 3-D Printer In Space Creates Its First Object

NASA's First 3-D Printer In Space Creates Its First Object

Newsy (Nov. 26, 2014) The International Space Station is now using a proof-of-concept 3D printer to test additive printing in a weightless, isolated environment. Video provided by Newsy
Powered by NewsLook.com
Feast Your Eyes: Lamb Chop Sent Into Space from UK

Feast Your Eyes: Lamb Chop Sent Into Space from UK

Reuters - Light News Video Online (Nov. 25, 2014) Take a stab at this -- stunt video shows a lamb chop's journey from an east London restaurant over 30 kilometers into space. Rough Cut (no reporter narration). Video provided by Reuters
Powered by NewsLook.com
Soyuz Spacecraft Docks With International Space Station: NASA

Soyuz Spacecraft Docks With International Space Station: NASA

AFP (Nov. 24, 2014) A Russian Soyuz spacecraft carrying Italy's first female astronaut safely docks with the International Space Station, according to NASA. Duration: 00:40 Video provided by AFP
Powered by NewsLook.com
Multi-National Crew Safely Docks at Space Station

Multi-National Crew Safely Docks at Space Station

Reuters - US Online Video (Nov. 24, 2014) A Russian Soyuz rocket delivers a multi-national trio to the International Space Station. Rough Cut (no reporter narration). Video provided by Reuters
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins