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Астронет: Астрономическая картинка дня Трапеция: в сердце Ориона http://variable-stars.ru/db/msg/1916207/eng |
Credit & Copyright: Fred Zimmer,
Telescope Live
Explanation:
Near the center of
this sharp cosmic portrait, at
the heart of the Orion Nebula,
are four hot, massive stars
known as
the Trapezium.
Gathered within a region about 1.5 light-years in radius,
they 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 would make it one
of the
closest known
black holes
to planet 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.