Скачать или смотреть Barnard 68 | Dark Absorption Nebula | Bok Nebula

Barnard 68 is a dark molecular cloud, an absorption nebula or Bok Nebula, about 400 light years away in the constellation of Ophiuchus.

It has a mass of about 2 solar mass and measuring about half a light year across. Being a dark absorption nebula, it obscures the light from objects behind it. The extinction of light by absorption nebulae is caused by interstellar dust grains located in the coldest parts of larger dust clouds.

However, Barnard 68 is not a part of any larger cloud, but a small isolated dark nebula, known as Bok Nebula. Due to its opacity, its interior is extremely cold, at about 16 K or -257 °C.

It is on the verge of gravitational collapse, and is expected to form a star in the next 200,000 years or so.

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Graphics: Space Engine, ESA
Music: April by Andy Leach
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