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Crescent Nebula

Index Crescent Nebula

The Crescent Nebula (also known as NGC 6888, Caldwell 27, Sharpless 105) is an emission nebula in the constellation Cygnus, about 5000 light-years away from Earth. [1]

19 relations: Astronomical filter, Caldwell catalogue, Crescent Nebula, Cygnus (constellation), Earth, Emission nebula, Euro, Gamma Cygni, Light-year, New General Catalogue, Red giant, Sharpless catalog, Shock wave, Soap Bubble Nebula, Stellar wind, William Herschel, Wolf–Rayet star, WR 136, X-ray.

Astronomical filter

An astronomical filter is a telescope accessory consisting of an optical filter used by amateur astronomers to simply enhance the details of celestial objects (much as with amateur photography).

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Caldwell catalogue

The Caldwell Catalogue is an astronomical catalogue of 109 star clusters, nebulae, and galaxies for observation by amateur astronomers.

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Crescent Nebula

The Crescent Nebula (also known as NGC 6888, Caldwell 27, Sharpless 105) is an emission nebula in the constellation Cygnus, about 5000 light-years away from Earth.

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Cygnus (constellation)

Cygnus is a northern constellation lying on the plane of the Milky Way, deriving its name from the Latinized Greek word for swan.

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Earth

Earth is the third planet from the Sun and the only astronomical object known to harbor life.

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Emission nebula

An emission nebula is a nebula formed of ionized gases that emit light of various wavelengths.

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Euro

The euro (sign: €; code: EUR) is the official currency of the European Union.

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Gamma Cygni

Gamma Cygni (γ Cygni, abbreviated Gamma Cyg, γ Cyg), also named Sadr, is a star in the northern constellation of Cygnus, forming the intersection of an asterism of five stars called the Northern Cross.

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Light-year

The light-year is a unit of length used to express astronomical distances and measures about 9.5 trillion kilometres or 5.9 trillion miles.

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New General Catalogue

The New General Catalogue of Nebulae and Clusters of Stars (abbreviated as NGC) is a catalogue of deep-sky objects compiled by John Louis Emil Dreyer in 1888.

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Red giant

A red giant is a luminous giant star of low or intermediate mass (roughly 0.3–8 solar masses) in a late phase of stellar evolution.

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Sharpless catalog

The Sharpless catalog is a list of 313 HII regions (emission nebulae), intended to be comprehensive north of declination −27°.

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Shock wave

In physics, a shock wave (also spelled shockwave), or shock, is a type of propagating disturbance.

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Soap Bubble Nebula

The Soap Bubble Nebula, or PN G75.5+1.7, is a planetary nebula in the constellation Cygnus, near the Crescent Nebula (NGC 6888).

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Stellar wind

A stellar wind is a flow of gas ejected from the upper atmosphere of a star.

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William Herschel

Frederick William Herschel, (Friedrich Wilhelm Herschel; 15 November 1738 – 25 August 1822) was a German-born British astronomer, composer and brother of fellow astronomer Caroline Herschel, with whom he worked.

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Wolf–Rayet star

Wolf–Rayet stars, often abbreviated as WR stars, are a rare heterogeneous set of stars with unusual spectra showing prominent broad emission lines of highly ionised helium and nitrogen or carbon.

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WR 136

WR 136 is a Wolf–Rayet star located in the constellation Cygnus.

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X-ray

X-rays make up X-radiation, a form of electromagnetic radiation.

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Redirects here:

Caldwell 27, NGC 6888, Sh2-105.

References

[1] https://en.wikipedia.org/wiki/Crescent_Nebula

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