Page 10-Thursday, November 17, 1977-The Michigan Daily
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Daily Photo by CHRISTINA SCHNEIDER
University Physics Prof. Dennis Hegyi, whose discovery of a faraway halo
of stars may overturn current theories about the origins of the universe,
poses with a celestial globe.
'BIG BANG' IN TROUBLE?
'U'prof.unearths
P.of

newhalc
By ELIZABETH SLOWIK
A University physics professor's
recent discovery could provide the
key to the future of the universe.
This past spring, Professor Dennis
Hegyi unearthed a halo of stars
around a galaxy 80 million light
years from Earth. His discovery,
indicates that although the universe
is now expanding because galaxies
are pulling away from each other,
sometime after the next 50 billion
years this action will reverse and all
mass will collide.
"WHETHER THAT happens or not
is a quantitative question," ex-
plained Hegyi. "You have to deter-
mine the mass of the halo of stars -
that hasn't been determined yet (for
this discovery)."
Hegyi designed and built a special
light-sensitive instrument especially
for his experiments: the annular
scanning photometer. This instru-
ment let him and his assistant,
graduate student Garth Gerber, pin-
point stars at the edge of the galaxy
which with previous instruments
were dim and hard to see.
Hegyi plans to conduct experi-
ments next February to determine
the color of light emitted by his new-
found stars. "We already have pre-

ofstars
liminary evidence of red light from
light measurements taken last
spring," he said. Red light means a
star's mass is large in relation to the .
amount of light it emits.
HEGYI SAID he has applied for re-
search time at Kitt Peak National
Observatory near Tucson, Arizona.
He isn't sure if he would be able to
use the University's Arizona observ-
atory, McGraw-Hill. McGraw-Hill is
under the astronomy department's
jurisdiction.
Scientists subscribing to the "Big
Bang" theory of creation believe the
universe is continually expanding.
But Hegyi's discovery could gravely
undermine their position.
What could make a galaxy stop
expanding?
"Throw a ball in the air," Hegyi
said. ''If you throw it quickly enough,
it will go forever, like a rocket. But
with a normal human throw, the ball
reaches a maximum distance and
falls back to the Earth.
"Now compare this to two galax-
ies. If they are not massive enough,
they will fly apart forever. But if
they're big enough, they'll fall back
to one another. The would all stop
and fall back toward us again."

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