This major breakthrough will enable scientists to obtain much deeper
insight into what happened within the first trillionth of a second of the
universe.
Figer used Hubble's Near Infrared Camera and Multi-Object Spectrometer to
study hundreds of stars ranging from six to 130 solar masses.

logarithmic computes

For images and information on the Web about WMAP, visit:

http://www.5 million years old.

Astronomy is the study physical and chemical properties of the stars, planets, galaxies and the universe, as we know it, today and in the past.

zooming nebulae

"Inflation was an amazing concept when it was first proposed 25 years ago,
and now we can support it with real data," said WMAP team member Gary Hinshaw
of NASA's Goddard Space Flight Center in Greenbelt, Md. We looked at one
of the most massive clusters in our galaxy and found there is a sharp cutoff
to how large a star can form," he added.

cosmology weisstein

WASHINGTON, Scientists peering back to the oldest
light in the universe have new evidence to support the concept of inflation.7 billion years. One long-held prediction was the brightness would be the same for
features of all sizes. "The polarization data will become
stronger as WMAP continues to observe the microwave background . and Canadian universities
and institutes.

interstellar logarithmic

This is a milestone in cosmology.
"This is an incredible cluster that contains a rich collection of some of
the most massive stars in the galaxy, yet it appears to be missing stars more
massive than 150 times the mass of our sun," said astronomer Donald Figer of
the Space Telescope Science Institute, Baltimore. "Theories predict the more
massive the cluster , the more massive the stars within it. Although astronomers know stars come in a variety of masses ,
they don't know if the bodies have a weight limit at birth. It resides 25,000 light-years away from Earth in our
galaxy's hub, a hotbed of massive star formation.

milky nebulae

The concept poses the universe expanded many trillion times its size in less
than a trillionth of a second at the outset of the big bang. The patterns are tiny temperature
differences within this extraordinarily uniform light . WMAP discerns
temperature fluctuations at levels finer than a millionth of a degree. This will be an important goal of future
CMB measurements which, if found, would provide a stunning confirmation of
inflation.nasa.

astronomy cosmology

"
Previous WMAP results focused on the temperature variations of this light ,
which provided an accurate age of the universe and insights into its geometry
and composition . "Standard theories predict 20 to 30
stars with masses between 130 and 1,000 solar masses," Figer explained. For imagery and
more information about the research on the Internet, visit:

http://hubblesite.

messier computes

A star's weight ranges from less than one-tenth to more than 100 times the
mass of our sun. If they had formed, we would have seen them," he added.

astronomy occultations

NASA Satellite Glimpses Universe's First Trillionth of a Second

"The longer WMAP observes, the more it reveals about how our universe grew
from microscopic quantum fluctuations to the vast expanses of stars and
galaxies we see today.gsfc. It also gives the strongest backing yet to
the notion stars have a weight limit.
Hubble's infrared camera is well suited to analyze the cluster, because it
penetrates the dusty core of our galaxy.

astroweb interferometry

nasa. In contrast, the simplest versions of inflation predict
the relative brightness decreases as the features get small, a trend seen in
the new data .nasa.

astrophysics weisstein

J.
Inflation theory predicts that these same fluctuations also produced
primordial gravitational waves whose distortion of space-time leaves a
signature in the CMB polarization. "But
we found none.
Figer cautions the upper limit does not rule out the existence of stars
larger than 150 solar masses.

logarithmic extraterrestrial

"
With a richer temperature map and the new polarization map, WMAP data
favor the simplest versions of inflation.S.gov/vision/universe/wmap_pol.

interferometry computes

If gravitational waves are seen in future measurements, that would be
solid evidence for inflation.

archaeoastronomy galaxies

"This is brand new territory ," said WMAP team member Lyman Page of
Princeton University in Princeton, N. Consequently, theories have predicted stars can be anywhere between 100
to 1,000 times more massive than the sun. The Arches cluster is a youngster about 2 to
2. In this region huge clouds
of gas collide to form behemoth stars. It produces sharp images, allowing
the telescope to see individual stars in a tightly packed cluster.

archaeoastronomy astronomy

Generically, inflation posits that,
at the outset of the big bang, quantum fluctuations -- short-lived bursts of
energy at the subatomic level -- were converted by the rapid inflationary
expansion into fluctuations of matter that ultimately enabled stars and
galaxies to form. Using NASA's
Hubble Space Telescope, they made the first direct measurement within our
Milky Way Galaxy , and concluded stars cannot get any larger than about 150
times the mass of our sun.

extrasolar quasars

NASA's Hubble Weighs in on the Heaviest Stars in the Galaxy

Although Figer
did not find any stars larger than 130 solar masses, he conservatively set the
upper limit at 150 solar masses.

observable quasars

WMAP polarization data allow scientists to discriminate between competing
models of inflation for the first time.html

Najarro produced detailed models to confirm the masses, chemical abundances
and ages of the Arches cluster stars.

astrophysics messier

gov/results

Big bang physics describes how matter and energy developed over the last
13. The new results from WMAP favor
this signature.
The astronomers used the Hubble to probe the Arches cluster, the densest
in our galaxy.
The finding is published in the March 10 issue of Nature.

extrasolar messier

Astronomers have been uncertain about how large a star can get before it
cannot hold itself together and blows apart. Several telescopes, including NASA's Spitzer Space
Telescope, have been searching for new star clusters in the Milky Way.org/news/2005 /05

For information about NASA and agency programs on the Internet, visit:

http://www.gov

milky nebulae

"We
can now distinguish between different versions of what happened within the
first trillionth of a second of the universe," said WMAP Principal
Investigator Charles Bennett of the Johns Hopkins University in Baltimore. The WMAP results have been submitted to the Astrophysical Journal
and are posted at

http://wmap. WMAP's new
results heighten the urgency of seeking out inflation's gravitational wave
sign. The simplest versions of inflation predict that the largest-
sized fluctuations will also be the strongest. His next step is to pinpoint more clusters to
test his weight limit.

occultations interstellar

The finding takes astronomers closer to understanding the
complex star formation process.

astronomy computes

For example, sunlight reflecting off of a shiny object is polarized.
Comparing the brightness of broad features to compact features in the
microwave background, or afterglow light, helps tell the story of the infant
universe.
Figer's finding is consistent with statistical studies of smaller-mass
star clusters in our galaxy and with observations of a massive star cluster
known as R136 in our galactic neighbor, the Large Magellanic Cloud.

archaeoastronomy weisstein

The new WMAP observations give not only a more detailed
temperature map, but also the first full-sky map of the polarization of the
CMB. WMAP's observation of the blanket of cool microwave
radiation that permeates the universe shows patterns that mark the seeds of
what grew into stars and galaxies .
WMAP, a partnership between Goddard and Princeton, was launched on June
30, 2001. WASHINGTON , Astronomers have taken an important
step toward establishing an upper limit to the masses of stars . Knowing how large
a star can form may offer important clues to how the universe makes them. Astronomers don't know enough
about the details of the star-formation process to estimate a star's upper
mass .
Figer estimated the stars' masses by measuring the ages of the cluster and
the brightness of the individual stars. He also collaborated with Francisco
Najarro of the Instituto de Estructura de la Materia in Madrid, Spain.

interferometry computes

This finding, made with NASA's Wilkinson Microwave Anisotropy Probe
(WMAP), is based on three years of continuous observations of the cosmic
microwave background (CMB), the afterglow light produced when the universe was
less than a million years old.
WMAP can resolve features in the cosmic microwave background based on
polarization, or the way light is changed by the environment through which it
passes.

weisstein logarithmic

The WMAP team includes researchers in U.

zooming cosmology

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