Bipolar Outflow - Relatively narrow beams of matter ejected in opposite directions by a protostar ...
Bipolar outflows are seen to occur both from very young stars ("protostars") that are still in the process of collapsing and forming, and from old stars nearing the ends of their lives that have become bloated red giants.
Sometimes the material will be ejected as a ring, sometimes the material gets blown off in two directions (remember bipolar outflow); it is also possible that the material will be blown out in bubbles.
Many have bipolar outflows like the Dumbbell Nebula, Hourglass Nebula, and Eskimo Nebula whose different orientations of their poles with our line of sight cause the differences in their appearance as seen from the Earth.
These condensations may play an important role in creating the bipolar outflow in the region.
Ho et al. 1990Extragalactic ammonia is imaged using the VLA in IC 342.
the loss of mass by a star during its evolution; some of the causes of mass loss include stellar winds, bipolar outflows, and the ejection of material in a planetary nebula or supernova
megaparsec ...
MASS LOSS - Loss of material by a star during its evolution; causes of mass loss include stellar winds, bipolar outflows, the ejection of material to form a planetary nebula, or supernova.
Saturn's rings before they were recognised as being a ring system. Now used to describe (i) the extension of Saturn's rings outside the disc of the planet, and (ii) extensions from the central star of some planetary nebulae (due to bipolar outflow of ...
 See also: Solar, Elements, Earth, Distance, Temperature
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