22 relations: Dorado, Doubly ionized oxygen, Emission nebula, Epoch (astronomy), European Space Agency, H-alpha, Hydrogen ion, Karl Gordon Henize, Large Magellanic Cloud, Light-year, Milky Way, Nanometre, Oxygen, Radiation pressure, Satellite galaxy, Spectral line, Star formation, Stellar wind, Superbubble, Supernova, Ultraviolet, X-ray.
Dorado (English pronunciation) is a constellation in the southern sky.
In astronomy and atomic physics, doubly ionized oxygen is the ion O2+ (also known as O III in spectroscopic notation).
An emission nebula is a nebula formed of ionized gases that emit light of various wavelengths.
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.
The European Space Agency (ESA; Agence spatiale européenne, ASE; Europäische Weltraumorganisation) is an intergovernmental organisation of 22 member states dedicated to the exploration of space.
H-alpha (Hα) is a specific deep-red visible spectral line in the Balmer series with a wavelength of 656.28 nm in air; it occurs when a hydrogen electron falls from its third to second lowest energy level.
A hydrogen ion is created when a hydrogen atom loses or gains an electron.
Karl Gordon Henize, Ph.D. (2004 News Releases, NASA Jet Propulsion Laboratory, Pasadena, California (US), March 8, 2004 17 October 1926 – 5 October 1993) was an American astronomer, space scientist, NASA astronaut, and professor at Northwestern University.
The Large Magellanic Cloud (LMC) is a satellite galaxy of the Milky Way.
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.
The Milky Way is the galaxy that contains our Solar System.
The nanometre (International spelling as used by the International Bureau of Weights and Measures; SI symbol: nm) or nanometer (American spelling) is a unit of length in the metric system, equal to one billionth (short scale) of a metre (m).
Oxygen is a chemical element with symbol O and atomic number 8.
Radiation pressure is the pressure exerted upon any surface due to the exchange of momentum between the object and the electromagnetic field.
A satellite galaxy is a smaller companion galaxy that travels on bound orbits within the gravitational potential of a more massive and luminous host galaxy (also known as the primary galaxy).
A spectral line is a dark or bright line in an otherwise uniform and continuous spectrum, resulting from emission or absorption of light in a narrow frequency range, compared with the nearby frequencies.
Star formation is the process by which dense regions within molecular clouds in interstellar space, sometimes referred to as "stellar nurseries" or "star-forming regions", collapse and form stars.
A stellar wind is a flow of gas ejected from the upper atmosphere of a star.
A superbubble or supershell is a cavity which is hundreds of light years across as is populated with hot (106 K) gas atoms, less dense than the surrounding interstellar medium, blown against that medium and carved out by multiple supernovae and stellar winds.
A supernova (plural: supernovae or supernovas, abbreviations: SN and SNe) is a transient astronomical event that occurs during the last stellar evolutionary stages of a star's life, either a massive star or a white dwarf, whose destruction is marked by one final, titanic explosion.
Ultraviolet (UV) is electromagnetic radiation with a wavelength from 10 nm to 400 nm, shorter than that of visible light but longer than X-rays.
X-rays make up X-radiation, a form of electromagnetic radiation.