Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

The Search for the First Stars

01.03.2012
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.

“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

James Cohen | Newswise Science News
Further information:
http://www.kavlifoundation.org

Further reports about: Astronomy IgM Milky Way Semantic Search Engine hydrogen gas

More articles from Physics and Astronomy:

nachricht Smallest transistor worldwide switches current with a single atom in solid electrolyte
17.08.2018 | Karlsruher Institut für Technologie (KIT)

nachricht Protecting the power grid: Advanced plasma switch for more efficient transmission
17.08.2018 | DOE/Princeton Plasma Physics Laboratory

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: It’s All in the Mix: Jülich Researchers are Developing Fast-Charging Solid-State Batteries

There are currently great hopes for solid-state batteries. They contain no liquid parts that could leak or catch fire. For this reason, they do not require cooling and are considered to be much safer, more reliable, and longer lasting than traditional lithium-ion batteries. Jülich scientists have now introduced a new concept that allows currents up to ten times greater during charging and discharging than previously described in the literature. The improvement was achieved by a “clever” choice of materials with a focus on consistently good compatibility. All components were made from phosphate compounds, which are well matched both chemically and mechanically.

The low current is considered one of the biggest hurdles in the development of solid-state batteries. It is the reason why the batteries take a relatively long...

Im Focus: Color effects from transparent 3D-printed nanostructures

New design tool automatically creates nanostructure 3D-print templates for user-given colors
Scientists present work at prestigious SIGGRAPH conference

Most of the objects we see are colored by pigments, but using pigments has disadvantages: such colors can fade, industrial pigments are often toxic, and...

Im Focus: Unraveling the nature of 'whistlers' from space in the lab

A new study sheds light on how ultralow frequency radio waves and plasmas interact

Scientists at the University of California, Los Angeles present new research on a curious cosmic phenomenon known as "whistlers" -- very low frequency packets...

Im Focus: New interactive machine learning tool makes car designs more aerodynamic

Scientists develop first tool to use machine learning methods to compute flow around interactively designable 3D objects. Tool will be presented at this year’s prestigious SIGGRAPH conference.

When engineers or designers want to test the aerodynamic properties of the newly designed shape of a car, airplane, or other object, they would normally model...

Im Focus: Robots as 'pump attendants': TU Graz develops robot-controlled rapid charging system for e-vehicles

Researchers from TU Graz and their industry partners have unveiled a world first: the prototype of a robot-controlled, high-speed combined charging system (CCS) for electric vehicles that enables series charging of cars in various parking positions.

Global demand for electric vehicles is forecast to rise sharply: by 2025, the number of new vehicle registrations is expected to reach 25 million per year....

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

LaserForum 2018 deals with 3D production of components

17.08.2018 | Event News

Within reach of the Universe

08.08.2018 | Event News

A journey through the history of microscopy – new exhibition opens at the MDC

27.07.2018 | Event News

 
Latest News

Quantum bugs, meet your new swatter

20.08.2018 | Information Technology

A novel synthetic antibody enables conditional “protein knockdown” in vertebrates

20.08.2018 | Life Sciences

Metamolds: Molding a mold

20.08.2018 | Information Technology

VideoLinks
Science & Research
Overview of more VideoLinks >>>