V838 Mon: Echoes from the Edge
Explanation:
Variable star V838
Monocerotis lies
near the edge of our Milky Way Galaxy,
about 20,000 light-years
from the Sun.
Still, ever since a
sudden
outburst was detected
in January 2002, this enigmatic star has taken the center of
an astronomical stage.
As astronomers watch, light from the outburst echoes across
pre-existing dust shells around V838 Mon, progressively illuminating
ever more distant regions.
This
stunning image of swirls of dust surrounding the star was
recorded by the
Hubble Space Telescope in
September of this year.
The picture spans about 14 light-years.
Astronomers expect the
expanding
echoes to continue to light up
the dusty environs
of
V838 Mon for at least the rest of the current decade.
Researchers
have now found that V838 Mon is likely a young binary star, but the
cause of its extraordinary outburst remains a mystery.
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.
