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Dumbbell Nebula

The Dumbbell Nebula (also known as Apple Core Nebula, Messier 27, M 27, or NGC 6853) is a planetary nebula in the constellation Vulpecula, at a distance of about 1,360 light years. [1]

26 relations: Amateur astronomy, Apparent magnitude, Brady Haran, Charles Messier, Constellation, Epoch (astronomy), Equator, Eskimo Nebula, European Southern Observatory, Helix Nebula, Light-year, List of Messier objects, List of planetary nebulae, Messier object, Minute and second of arc, New General Catalogue, Photoionization, Planetary nebula, Radius, Semi-minor axis, Spheroid, Spitzer Space Telescope, The Astronomical Journal, Vulpecula, White dwarf, 10 exametres.

Amateur astronomy

Amateur astronomy is a hobby whose participants enjoy watching the sky, and the abundance of objects found in it with the unaided eye, binoculars, or telescopes.

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Apparent magnitude

The apparent magnitude (m) of a celestial object is a measure of its brightness as seen by an observer on Earth, adjusted to the value it would have in the absence of the atmosphere.

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Brady Haran

Brady John Haran (born 18 June 1976) is an Australian independent film-maker and video journalist who is known for his educational videos and documentary films produced for BBC News and for his YouTube channels, such as Numberphile and Periodic Videos.

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Charles Messier

Charles Messier (26 June 1730 – 12 April 1817) was a French astronomer most notable for publishing an astronomical catalogue consisting of nebulae and star clusters that came to be known as the 110 "Messier objects".

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Constellation

In modern astronomy, a constellation is a specific area of the celestial sphere as defined by the International Astronomical Union (IAU).

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Epoch (astronomy)

In astronomy, an epoch is a moment in time used as a reference point for some time-varying astronomical quantity, such as the celestial coordinates or elliptical orbital elements of a celestial body, because these are subject to perturbations and vary with time.

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Equator

An equator is the intersection of a sphere's surface with the plane perpendicular to the sphere's axis of rotation and midway between the poles.

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Eskimo Nebula

The Eskimo Nebula (NGC 2392), also known as the Clownface Nebula or Caldwell 39, is a bipolar double-shell planetary nebula (PN).

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European Southern Observatory

The European Southern Observatory (ESO, formally: European Organisation for Astronomical Research in the Southern Hemisphere; Observatoire européen austral) is a 16-nation intergovernmental research organisation for astronomy.

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Helix Nebula

The Helix Nebula, also known as The Helix, NGC 7293, is a large planetary nebula (PN) located in the constellation Aquarius.

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Light-year

A light-year (abbreviation: ly), sometimes written light year, is a unit of length used informally to express astronomical distances.

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List of Messier objects

The Messier objects are a set of 110 astronomical objects catalogued by the French astronomer Charles Messier in his "Catalogue des Nébuleuses et des Amas d'Étoiles" ("Catalogue of Nebulae and Star Clusters").

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List of planetary nebulae

The following is an incomplete list of known planetary nebulae.

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Messier object

The Messier objects are a set of over 100 astronomical objects first listed by French astronomer Charles Messier in 1771.

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Minute and second of arc

A minute of arc (MOA), arcminute (arcmin) or minute arc is a unit of angular measurement equal to one-sixtieth of one degree.

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New General Catalogue

The New General Catalogue of Nebulae and Clusters of Stars (abbreviated as NGC) is a well-known catalogue of deep-sky objects in astronomy compiled by John Louis Emil Dreyer in 1888, as a new version of John Herschel's Catalogue of Nebulae and Clusters of Stars.

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Photoionization

Photoionization is the physical process in which an ion is formed from the interaction of a photon with an atom or molecule.

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Planetary nebula

A planetary nebula, often abbreviated as PN or plural PNe, is a kind of emission nebula consisting of an expanding glowing shell of ionized gas ejected from old red giant stars late in their lives.

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Radius

In classical geometry, the radius of a circle or sphere is the length of a line segment from its center to its perimeter.

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Semi-minor axis

In geometry, the semi-minor axis (also semiminor axis) is a line segment associated with most conic sections (that is, with ellipses and hyperbolas) that is at right angles with the semi-major axis and has one end at the center of the conic section.

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Spheroid

A spheroid, or ellipsoid of revolution, is a quadric surface obtained by rotating an ellipse about one of its principal axes; in other words, an ellipsoid with two equal semi-diameters.

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Spitzer Space Telescope

The Spitzer Space Telescope (SST), formerly the Space Infrared Telescope Facility (SIRTF), is an infrared space observatory launched in 2003.

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The Astronomical Journal

The Astronomical Journal (often abbreviated AJ in scientific papers and references) is a peer-reviewed monthly scientific journal owned by the American Astronomical Society and currently published by IOP Publishing.

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Vulpecula

Vulpecula is a faint constellation in the northern sky.

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White dwarf

A white dwarf, also called a degenerate dwarf, is a stellar remnant composed mostly of electron-degenerate matter.

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10 exametres

To help compare different orders of magnitude, this page lists distances starting at 10 Em (1019 m or 1,100 light years).

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Redirects here:

Dumbbell nebula, M 27, Messier 27, Messier Object 27, NGC 6853.

References

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

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