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Астронет: Астрономическая картинка дня Трапеция: в сердце Ориона http://www.astronet.ru/db/msg/1970977/eng |
Credit & Copyright: Data:
Hubble Legacy Archive,
Processing:
Robert Gendler
Explanation:
What lies in the heart of Orion?
Trapezium: four bright stars, that can be found near the center of this sharp cosmic portrait.
Gathered within a region about 1.5 light-years in radius,
these stars dominate the core of the dense
Orion Nebula Star Cluster.
Ultraviolet ionizing radiation from the
Trapezium stars,
mostly from the brightest star
Theta-1
Orionis C
powers the complex star forming region's entire visible glow.
About three million years old, the Orion Nebula Cluster was
even more compact in its younger years and a
dynamical study indicates that
runaway stellar collisions
at an earlier age may have formed a black hole
with more than 100 times the mass of
the Sun.
The presence of a
black hole within the cluster
could explain the observed high velocities of the
Trapezium stars.
The Orion Nebula's distance of some 1,500
light-years make it one of the
closest candidate black holes to Earth.
Authors & editors:
Robert Nemiroff
(MTU) &
Jerry Bonnell
(USRA)
NASA Web Site Statements, Warnings,
and Disclaimers
NASA Official: Jay Norris.
Specific
rights apply.
A service of:
LHEA at
NASA /
GSFC
& Michigan Tech. U.