Celestial hemisphere:  Southern  ·  Constellation: Sagittarius (Sgr)  ·  Contains:  7 Sgr  ·  9 Sgr  ·  B296  ·  B88  ·  B89  ·  LBN 25  ·  LBN 26  ·  LDN 180  ·  Lagoon Nebula  ·  M 8  ·  NGC 6523  ·  NGC 6526  ·  NGC 6530  ·  NGC 6544  ·  Sh2-25  ·  Sh2-28  ·  The star 7Sgr  ·  The star 9Sgr
M8 HaLRGB, Sergiy_Vakulenko
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M8 HaLRGB

M8 HaLRGB, Sergiy_Vakulenko
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M8 HaLRGB

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Description

The Lagoon Nebula (M8, NGC 6523, SH2-25) is a giant interstellar cloud in the constellation Sagittarius. It is classified as an emission nebula and as an H II region. Within the nebula is the open cluster NGC 6530.

The Lagoon Nebula is estimated to be between 4,000-6,000 light-years away from the Earth. In the sky of Earth, it spans 90' by 40', which translates to an actual dimension of 110 by 50 light years. Like many nebulas, it appears pink in time-exposure color photos but is gray to the eye peering through binoculars or a telescope, human vision having poor color sensitivity at low light levels. The nebula contains a number of Bok globules (dark, collapsing clouds of protostellar material), the most prominent of which have been catalogued by E. E. Barnard as B88, B89 and B296. It also includes a funnel-like or tornado-like structure caused by a hot O-type star that emanates ultraviolet light, heating and ionizing gases on the surface of the nebula. The Lagoon Nebula also contains at its centre a structure known as the Hourglass Nebula (so named by John Herschel), which should not be confused with the better known Engraved Hourglass Nebula in the constellation of Musca. In 2006 the first four Herbig–Haro objects were detected within the Hourglass, also including HH 870. This provides the first direct evidence of active star formation by accretion within it.

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  • M8 HaLRGB, Sergiy_Vakulenko
    Original
  • M8 HaLRGB, Sergiy_Vakulenko
    B
  • M8 HaLRGB, Sergiy_Vakulenko
    C
  • Final
    M8 HaLRGB, Sergiy_Vakulenko
    D
  • M8 HaLRGB, Sergiy_Vakulenko
    E
  • M8 HaLRGB, Sergiy_Vakulenko
    F

B

Description: Lagoon in Ha

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C

Description: Starless Ha version

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D

Description: Reprocessed old HaLRGB data from the scratch.

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E

Description: Reprocessed old Ha data from the scratch.

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F

Description: Reprocessed old Ha data from the scratch (Starless)

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M8 HaLRGB, Sergiy_Vakulenko