یک مقدار متنابهی از گاز
و گرد و غبار کیهانی در محدوده ای به قطر 70 سال نوری از
ستارگان جوان مشاهده شده است.
RCW 79: Stars in a
Bubble
Credit: E.
Churchwell (Univ.
Wisconsin-Madison) et al., JPL-Caltech, NASA
Explanation: A cosmic
bubble of
gas and dust, RCW 79 has grown to about 70 light-years in
diameter, blown by the winds and radiation from hot young stars. Infrared light
from the dust embedded
in the nebula is tinted red in this gorgeous false-color
view from the Spitzer
Space Telescope. A good 17
thousand light-years away in the grand southern constellation
Centaurus, the expanding
nebula itself has triggered star formation as it plows into
the gas and dust surrounding it. In fact, this penetrating infrared
picture reveals
groups of new stars as yellowish points scattered along the
bubble's edge. One remarkable group still lies within its
own natal bubble at about 7 o'clock (lower left), while
another can be seen near the upper gap at about 3 o'clock
(right) from the bubble's center.
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