Bok Globule

Bok Globule In 1947, Bart Bok suggested that the small dark globules of interstellar gas and dust were undergoing collapse on their way to forming new stars. In recent years, a great deal of evidence supporting this proposal has been found.

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Bok globule Dark concentrated nebula cloud about 1 ly in diameter, containing some ten to a thousand Sol masses of dust and gas, and pertaining to the early stages of star formation.

Bok globules in H II region IC 2944. The actual birth of stars within H II regions is hidden from us by the dense clouds of gas and dust which surround the nascent stars.

Bok Globules Small, dark clouds only about 1 light year in diameter that contain 10-1000 solar masses of gas and dust. Believed to be related to star formation. Bow Shock ...

Bok globule -- small, dark, interstellar cloud, often approximately spherical. Many globules are the early stages of protostars. brown dwarf -- a star that has a mass too low for it to begin nuclear fusion.

Bok Globule A compact, spherical dark nebula. Bok globules have characteristic radii of 103-105 AU. Estimates of their mass suggest that their density is too low for gravitational collapse.

Main article: Bok globule Isolated gravitationally bound small molecular clouds with masses less than a few hundred times the mass of the sun are called Bok globules.

Found that some Bok globules contain protostars Cataloged thousands of hot, dense cores within clouds of gas and dust which could be newly forming stars Cataloged over 12,000 variable stars, the largest collection known to date ...

Recent observations at radio wavelengths of a gas cloud known as Bok Globule B335 have produced images of material collapsing onto a newly born star (only about 150,000 years old).

As the cloud collapses, individual conglomerations of dense dust and gas form what are known as Bok globules. These can contain up to 50 solar masses of material.

The clouds, which are known as Bok globules after the astronomer who first described them, are so thick that they absorb the light from stars or gas clouds behind them.

Dark dusk clouds like these ``Bok globules'' in IC 2948 were once thought to be holes in the sky. The dark clouds block the light from the emission nebula behind.

Bart Jan Bok 1906-1983 Dutch suggested that small dark globules of interstellar gas and dusk (now called Bok globules) are collapsing to form new stars ...

A dense, spherical cloud of dust that absorbs radiation (see Bok globule). [H76] Glueball ...

toward the center, providing the protostar with heat and a weak infra-red glow -- heat is defined as particle motion -- and rotation (think of an ice skater pulling in her arms as she goes into a spin). (Protostars can be detected in Bok Globules.) ...

See also: Dust, Globule, Nebula, Star, Light