Spicules: Jets on the Sun
Explanation:
Imagine a pipe as wide as a state and as long as half the Earth.
Now imagine that this pipe is filled with
hot gas moving 50,000 kilometers per hour.
Further imagine that this pipe is not made of metal but a transparent
magnetic field.
You are envisioning just one of thousands of young
spicules on the
active Sun.
Pictured
above
is perhaps the highest
resolution image yet of these enigmatic solar flux tubes.
Spicules dot the
above frame of
solar active region 10380 that crossed the Sun in 2004 June,
but are particularly evident as a
carpet of dark tubes on the right.
Time-sequenced images have recently shown that
spicules last about five minutes,
starting out as
tall tubes
of rapidly rising gas but eventually
fading as the gas peaks and falls back down to the
Sun.
These images also indicate that the ultimate cause of
spicules
is sound-like waves that flow over the
Sun's
surface but leak into the
Sun's atmosphere.
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.
