Posted on 01/10/2002 7:18:34 AM PST by JediGirl
WASHINGTON (AP) — An outburst of star formation ended a half billion years of utter darkness following the Big Bang, the theoretical start of the universe, according to a study that challenges old ideas about the birth of the first stars.
An analysis of very faint galaxies in the deepest view of the universe ever captured by a telescope suggests there was an eruption of stars that burst to life and pierced the blackness very early in the 15 billion-year history of the universe.
The study, by Kenneth M. Lanzetta of the State University of New York at Stony Brook, challenges the long held belief that star formation started slowly after the Big Bang and didn't peak until some 5 billion years later.
``Star formation took place early and very rapidly,'' Lanzetta said Tuesday at a National Aeronautics and Space Administration news conference. ``Star formation was 10 times higher in the distant early universe than it is today.''
Lanzetta's conclusions are based on an analysis of what is called a deep field study by the Hubble Space Telescope. To capture the faintest and most distant images possible, the Hubble focused on an ordinary bit of sky for more than 14 days, taking a picture of every object within a small, deep slice of the heavens. The resulting images are faint, fuzzy bits of light from galaxies near and far, including some more than 14 billion light-years away, said Lanzetta.
The surprise was that the farther back the telescope looked, the greater the star-forming activity was.
``Star formation continued to increase to the very earliest point that we could see,'' said Lanzetta. ``We are seeing close to the first burst of star formation.''
Bruce Margon of the Space Telescope Science Institute in Baltimore said Lanzetta's conclusions are a ``surprising result'' that will need to be confirmed by other studies.
``This suggests that the great burst of star formation was at the beginning of the universe,'' said Margon, noting that, in effect: ``The finale came first.''
``If this can be verified, it will dramatically change our understanding of the universe,'' said Anne Kinney, director of the astronomy and physics division at NASA.
In his study, Lanzetta examined light captured in the Hubble deep field images, using up to 12 different light filters to separate the colors. The intensity of red was used to establish the distance to each point of light. The distances were then used to create a three-dimensional perspective of the 5,000 galaxies in the Hubble picture.
Lanzetta also used images of nearby star fields as a yardstick for stellar density and intensity to conclude that about 90 percent of the light in the very early universe was not detected by the Hubble. When this missing light was factored into the three-dimensional perspective, it showed that the peak of star formation came just 500 million years after the Big Bang and has been declining since.
Current star formation, he said, ``is just a trickle'' of that early burst of stellar birth.
Lisa Storrie-Lombardi, a California Institute of Technology astronomer, said that the colors of the galaxies in the Hubble deep field images ``are a very good indication of their distance.''
Current theory suggests that about 15 billion years ago, an infinitely dense single point exploded — the Big Bang — creating space, time, matter and extreme heat. As the universe cooled, light elements, such as hydrogen and helium, formed. Later, some areas became more dense with elements than others, forming gravitational centers that attracted more and more matter. Eventually, celestial bodies became dense enough to start nuclear fires, setting the heavens aglow. These were newborn stars.
Storrie-Lombardi said that current instruments and space telescopes now being planned could eventually, perhaps, see into the Dark Era, the time before there were stars.
``We are getting close to the epoch where we can not see at all,'' she said.
———
On the Net:
Hubble images: http://oposite.stsci.edu/pubinfo/pr/2002/02
Also: http://hubble.stsci.edu/go/news
thanks
Ten days into the new year and we've already had 14 crevo threads:
(2002-01-01) Conservatives, Darwin & Design: An Exchange
(2002-01-01) Design Yes, Intelligent No
(2002-01-01) Intelligent Design As a Theory of Technological Evolution
(2002-01-07) Genetic Marker Tells Squash Domestication Story
(2002-01-07) SNPs as Windows on Evolution
(2002-01-07) Supreme Court Won't Hear Case on Teaching Evolution
(2002-01-07) Universe Of Life: Maybe Not, A
(2002-01-07) What Every Theologian Should Know about Creation, Evolution, and Design
(2002-01-08) Universe Might Last Forever, Astronomers Say, but Life Might Not, The
(2002-01-09) Life On Other Planets? Vatican Aide Ponders The Possibility
(This is simply a type of bump)
God spoke and, BANG!, the universe was created.
And they do.
END OF STORY --- BEGINNING OF NEW ONE.
It ALWAYS comes back to 'apparently sudden' formation (yeah, I know, the timelines vary widely, but the 'evidence' shows up quickly), whether we are talking about stars, or mammals. Wonder why?
Neither one can be proven beyond a doubt, but I'd rather believe the one that doesn't have to change all the time to avoid discrepancy.
It's because theories are revised as more information surfaces. THe Bible on the other hand, is a religious text so of course, never changes.
Because scientists learn, while fundamentalists don't.
:-)
Big Bang?
You've got to be kidding.
God
Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.