Bok Globules

When a star is born, dark clouds of dust and gas can be seen around it as some kind of a waste matter. They are called Bok Globules, which can be seen from telescopes as black and shapeless islands around newly formed stars. These can be compared to a cocoon, where a beautiful butterfly metamorphoses from a shell.

Bok globules were first seen and observed by astronomer Bart Bok in the 1940s. He hypothesized that as these dark clouds undergo gravitational collapse (where they fall inwards as a result of the pull of gravity); stars and star clusters are born. When Bok published his observation during that time, his hypothesis was very difficult to prove because when bok globules form, all lights within it are blot out. But thanks to the modern technology, infrared observations in 1990 analyzed and confirmed that stars were being born inside these dark clouds. However, bok globules still remain a subject of intense research. Their structure, density and temperature are still a mystery to the scientists.

Bok globules are different however from giant molecular clouds (GMC), where stars are born within them. Bok globules are also molecular clouds, but these GMCs are so large they can cover a large part of a constellation, such as the Orion Molecular Cloud (OMC) and the Taurus Molecular Cloud (TMC).

Bok Globules

One Response to “ Bok Globules ”

  1. K

    Speculation: Bok Globules like Barnard 86 are shaped by dark energy.
    In an active galactic nucleus vast amounts of dark energy are created. As it billows out and away from its site of origination, other matter becomes entraned and carried along. Mostly the generated dark energy escapes the center of a spiral galaxy above and below the plane of the galaxy. In an elliptical it can freely escape in all directions. We cannot detect dark energy; we can see the materials being ushered along with it. See Fermi bubbles.
    The formation of dark energy is an extremely endothermic reaction. Thus, the clouds and waves of it and real matter are cool, concentrated and primed for star formation. Star bursts and other forces can distort and warm the dark energy cloud.
    Eventually, the D.E. makes it way to the intergalactic medium where it contrlibutes to the expansion of space. K