Bok globule - Wikipedia
网页Bok globules were first observed by astronomer Bart Bok in the 1940s. In an article published in 1947, he and Edith F. Reilly hypothesized that these clouds were "similar to insect's cocoons " that were undergoing gravitational collapse to form new stars, from which stars and star clusters were born. [ 4 ][failed verification] This hypothesis ...
What is a Bok globule? | Astronomy.com - Astronomy Magazine
网页2008年7月28日 · A Bok globule is a compact dark nebula first recognized by Dutch-American astronomer Bart Bok (1906–1983). Dust makes up about 1 percent of these clouds by mass. Cold gas constitutes the rest....
Bok Globules | Center for Astrophysics | Harvard & Smithsonian
网页2010年6月4日 · Bok globules are small interstellar clouds of very cold gas and dust that are so thick they are nearly totally opaque to visible light, although they can be studied with infrared and radio techniques.
Barnard 68 - Wikipedia
网页Barnard 68 is a molecular cloud, dark absorption nebula or Bok globule, towards the southern constellation Ophiuchus and well within the Milky Way galaxy at a distance of about 125 parsecs (407 lightyears). [2] It is both close and dense enough that stars behind it cannot be seen from Earth.
Mysterious Dark Nebula: What Is a Bok Globule - CosmoBC …
网页2023年12月2日 · What Is a Bok Globule. Bok globules are fascinating objects of the interstellar medium. They are small, dark clouds of gas and dust, named after astronomer Bart Bok, who first discovered them in the 1940s. These dense dark clouds obscure nearly all visible light emitted from within and are among the coldest objects in the universe.
Bok Globule - Definition & Detailed Explanation - Astronomical ...
网页2024年3月24日 · Bok Globules are small, dark, dense clouds of gas and dust found in interstellar space. They were first discovered by astronomer Bart Bok in the 1940s, hence the name “Bok Globule.” These mysterious objects are often referred to as “miniature versions of dark nebulae” due to their similar appearance and composition.
Bok globule | astronomy | Britannica
网页Bart J. Bok (born April 28, 1906, Hoorn, Netherlands—died August 7, 1983, Tucson, Arizona, U.S.) was a Dutch-born American astronomer known for his work on the structure and evolution of the Milky Way Galaxy and for his study of “ Bok globules,” small dark clouds observable against the background of bright nebulae.
Bok Globule – Definition & Detailed Explanation - Sentinel Mission
网页2024年4月7日 · What is a Bok Globule? Bok Globules are small, dark, dense clouds of gas and dust found in space. They were first identified by astronomer Bart Bok in the 1940s and are named in his honor. These globules are typically isolated and have diameters ranging from 0.5 to 5 light-years.
The Bok globule BHR 160: structure and star formation
网页2015年6月18日 · Fig. 1. Close-up of the BHR 160 globule from an ESO-R sky survey plate. The bright rim is striking in appearance. The bright star in front of the bright rim is the early B-type star HD 319648.The red asterisk marks the location of the embedded source IRS 1, see Fig. 4 and the text for details. The region between …
Bok Globules - Scientific American
网页Bok Globules. They are spherical clouds of interstellar dust and gas that show up against a background of stars or of luminous gas. The evidence suggests that they are collapsing and may be stars...