82 relations: A-type main-sequence star, Alpha Apodis, Apparent magnitude, Ara (constellation), Astronomical unit, B-type main-sequence star, Bayer designation, Beta Apodis, Binary star, Bird-of-paradise, Blue straggler, Bow shocks in astrophysics, Brown dwarf, Chamaeleon, Circinus, Constellation, Constellation family, Debris disk, Declination, Delta Apodis, Doppler spectroscopy, Double star, Dutch language, East Indies, Equatorial coordinate system, Eta Apodis, Eugène Joseph Delporte, Exoplanet, Ferdinand Magellan, First Dutch Expedition to Indonesia, Frederick de Houtman, Galactic halo, Gamma Apodis, Giant star, Globular cluster, Greek language, HD 131664, HD 134606, HD 137388, IC 4499, Infrared excess, Integrated Flux Nebula, International Astronomical Union, Interstellar medium, Iota Apodis, Jakob Bartsch, Jodocus Hondius, Johann Bayer, Johannes Kepler, Luminosity, ..., Main sequence, Milky Way, Minute and second of arc, Monthly Notices of the Royal Astronomical Society, Musca, NGC 6101, Nicolas-Louis de Lacaille, NO Apodis, Octans, Pavo (constellation), Petrus Plancius, Pieter Dirkszoon Keyser, Popular Astronomy (US magazine), R Apodis, R Coronae Borealis variable, Red giant, Right ascension, S Apodis, Sky & Telescope, South Pole, Southern celestial hemisphere, Stellar wind, The Astronomical Journal, Theta Apodis, Triangulum Australe, Uranometria, Variable star designation, Zeta Apodis, 22nd parallel north, 5th parallel north, 7th parallel north, 88 modern constellations. Expand index (32 more) » « Shrink index
An A-type main-sequence star (A V) or A dwarf star is a main-sequence (hydrogen-burning) star of spectral type A and luminosity class V. These stars have spectra which are defined by strong hydrogen Balmer absorption lines.
Alpha Apodis (Alpha Aps, α Apodis, α Aps) is the brightest star in the southern circumpolar constellation of Apus, with an apparent magnitude of approximately 3.825.
The apparent magnitude of a celestial object is a number that is a measure of its brightness as seen by an observer on Earth.
Ara (Latin: "The Altar") is a southern constellation situated between Scorpius and Triangulum Australe.
The astronomical unit (symbol: au, ua, or AU) is a unit of length, roughly the distance from Earth to the Sun.
A B-type main-sequence star (B V) is a main-sequence (hydrogen-burning) star of spectral type B and luminosity class V. These stars have from 2 to 16 times the mass of the Sun and surface temperatures between 10,000 and 30,000 K. B-type stars are extremely luminous and blue.
A Bayer designation is a stellar designation in which a specific star is identified by a Greek letter, followed by the genitive form of its parent constellation's Latin name.
Beta Apodis (β Aps, β Apodis) is the Bayer designation for a star in the southern circumpolar constellation of Apus.
A binary star is a star system consisting of two stars orbiting around their common barycenter.
The birds-of-paradise are members of the family Paradisaeidae of the order Passeriformes.
A blue straggler is a main-sequence star in an open or globular cluster that is more luminous and bluer than stars at the main-sequence turn-off point for the cluster.
Bow shocks form the boundary between a magnetosphere and an ambient magnetized medium.
Brown dwarfs are substellar objects that occupy the mass range between the heaviest gas giant planets and the lightest stars, having masses between approximately 13 to 75–80 times that of Jupiter, or approximately to about.
Chamaeleon is a small constellation in the southern sky.
Circinus is a small, faint constellation in the southern sky, first defined in 1756 by the French astronomer Nicolas-Louis de Lacaille.
A constellation is a group of stars that are considered to form imaginary outlines or meaningful patterns on the celestial sphere, typically representing animals, mythological people or gods, mythological creatures, or manufactured devices.
Constellation families are collections of constellations sharing some defining characteristic, such as proximity on the celestial sphere, common historical origin, or common mythological theme.
A debris disk is a circumstellar disk of dust and debris in orbit around a star.
In astronomy, declination (abbreviated dec; symbol δ) is one of the two angles that locate a point on the celestial sphere in the equatorial coordinate system, the other being hour angle.
Delta Apodis (δ Aps, δ Apodis) is the Bayer designation for a double star in the southern constellation of Apus.
Doppler spectroscopy (also known as the radial-velocity method, or colloquially, the wobble method) is an indirect method for finding extrasolar planets and brown dwarfs from radial-velocity measurements via observation of Doppler shifts in the spectrum of the planet's parent star.
In observational astronomy, a double star or visual double is a pair of stars that appear close to each other in the sky as seen from Earth when viewed through an optical telescope.
The Dutch language is a West Germanic language, spoken by around 23 million people as a first language (including the population of the Netherlands where it is the official language, and about sixty percent of Belgium where it is one of the three official languages) and by another 5 million as a second language.
The East Indies or the Indies are the lands of South and Southeast Asia.
The equatorial coordinate system is a celestial coordinate system widely used to specify the positions of celestial objects.
Eta Apodis, Latinized from η Apodis, is a star in the southern circumpolar constellation Apus.
Eugène Joseph Delporte (10 January 1882 – 19 October 1955) was a Belgian astronomer born in Genappe.
An exoplanet or extrasolar planet is a planet outside our solar system.
Ferdinand Magellan (or; Fernão de Magalhães,; Fernando de Magallanes,; c. 1480 – 27 April 1521) was a Portuguese explorer who organised the Spanish expedition to the East Indies from 1519 to 1522, resulting in the first circumnavigation of the Earth, completed by Juan Sebastián Elcano.
The First Dutch Expedition to Indonesia (Dutch: Eerste Schipvaart) was an expedition that took place from 1595 to 1597.
Frederick de Houtman (1571 – 21 October 1627), or Frederik de Houtman, was a Dutch explorer who sailed along the Western coast of Australia en route to Batavia, known today as Jakarta in Indonesia.
A galactic halo is an extended, roughly spherical component of a galaxy which extends beyond the main, visible component.
Gamma Apodis (γ Aps, γ Apodis) is the Bayer designation for a star in the southern circumpolar constellation of Apus.
A giant star is a star with substantially larger radius and luminosity than a main-sequence (or dwarf) star of the same surface temperature.
A globular cluster is a spherical collection of stars that orbits a galactic core as a satellite.
Greek (Modern Greek: ελληνικά, elliniká, "Greek", ελληνική γλώσσα, ellinikí glóssa, "Greek language") is an independent branch of the Indo-European family of languages, native to Greece and other parts of the Eastern Mediterranean and the Black Sea.
HD 131664 is an 8th magnitude G-type main sequence star located approximately 181 light-years away in the constellation of Apus.
HD 134606 is a class G6IV (yellow subgiant) star in the constellation Apus.
HD 137388 is a class K2IV (orange subgiant) star in the constellation Apus.
IC 4499 is a loose globular cluster in the constellation Apus.
An infrared excess is a measurement of an astronomical source, typically a star, that in their spectral energy distribution has a greater measured infrared flux than expected by assuming the star is a blackbody radiator.
Integrated Flux Nebulas are a relatively recently identified astronomical phenomenon.
The International Astronomical Union (IAU; Union astronomique internationale, UAI) is an international association of professional astronomers, at the PhD level and beyond, active in professional research and education in astronomy.
In astronomy, the interstellar medium (ISM) is the matter and radiation that exists in the space between the star systems in a galaxy.
Iota Apodis (ι Aps, ι Apodis) is the Bayer designation for a binary star system in the southern circumpolar constellation of Apus.
Jakob Bartsch or Jacobus Bartschius (c. 1600 – 26 December 1633) was a German astronomer.
Jodocus Hondius (Latinized version of his Dutch name: Joost de Hondt) (14 October 1563 – 12 February 1612) was a Flemish engraver and cartographer.
Johann Bayer (1572 – 7 March 1625) was a German lawyer and uranographer (celestial cartographer).
Johannes Kepler (December 27, 1571 – November 15, 1630) was a German mathematician, astronomer, and astrologer.
In astronomy, luminosity is the total amount of energy emitted per unit of time by a star, galaxy, or other astronomical object.
In astronomy, the main sequence is a continuous and distinctive band of stars that appear on plots of stellar color versus brightness.
The Milky Way is the galaxy that contains our Solar System.
A minute of arc, arcminute (arcmin), arc minute, or minute arc is a unit of angular measurement equal to of one degree.
Monthly Notices of the Royal Astronomical Society (MNRAS) is a peer-reviewed scientific journal covering research in astronomy and astrophysics.
Musca is a small constellation in the deep southern sky.
NGC 6101 (also known as Caldwell 107) is a globular cluster in the constellation Apus, which was discovered by James Dunlop and catalogued by him as Δ68.
Abbé Nicolas-Louis de Lacaille, formerly sometimes spelled de la Caille, (15 March 1713 – 21 March 1762) was a French astronomer.
NO Apodis (HD 156513) is semi-regular pulsating star located in the far southern constellation Apus.
Octans is a faint constellation located in the deep southern sky.
Pavo is a constellation in the southern sky with the Latin name for peacock.
Petrus Plancius (1552 – May 15, 1622) was a Dutch-Flemish astronomer, cartographer and clergyman.
Pieter Dirkszoon Keyser, sometimes Petrus Theodorus (c. 1540 in Emden – 11 September 1596 in Banten), was a Dutch navigator who mapped the southern sky.
Popular Astronomy is an American magazine published by John August Media, LLC and hosted at TechnicaCuriosa.com for amateur astronomers.
R Apodis (R Aps) is a star in the constellation Apus.
An R Coronae Borealis variable (abbreviated RCB, R CrB) is an eruptive variable star that varies in luminosity in two modes, one low amplitude pulsation (a few tenths of a magnitude), and one irregular, unpredictably-sudden fading by 1 to 9 magnitudes.
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.
Right ascension (abbreviated RA; symbol) is the angular distance measured only eastward along the celestial equator from the Sun at the March equinox to the (hour circle of the) point above the earth in question.
S Apodis (HD 133444) is an R Coronae Borealis variable star located in the far southern constellation Apus.
Sky & Telescope (S&T) is a monthly American magazine covering all aspects of amateur astronomy, including the following.
The South Pole, also known as the Geographic South Pole or Terrestrial South Pole, is one of the two points where the Earth's axis of rotation intersects its surface.
The Southern Celestial Hemisphere, or the Southern Sky, is the southern half of the celestial sphere, which appears to rotate around a polar axis due to Earth's rotation.
A stellar wind is a flow of gas ejected from the upper atmosphere of a star.
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.
Theta Apodis (θ Aps, θ Apodis) is the Bayer designation for a star in the southern circumpolar constellation of Apus.
Triangulum Australe is a small constellation in the far Southern Celestial Hemisphere.
Uranometria is the short title of a star atlas produced by Johann Bayer.
Variable stars are designated using a variation on the Bayer designation format of an identifying label (as described below) combined with the Latin genitive of the name of the constellation in which the star lies.
Zeta Apodis, Latinized from ζ Apodis, is the Bayer designation for a star in the southern constellation of Apus.
The 22nd parallel north is a circle of latitude that is 22 degrees north of the Earth's equatorial plane.
The 5th parallel north is a circle of latitude that is 5 degrees north of the Earth's equatorial plane.
The 7th parallel north is a circle of latitude that is 7 degrees north of the Earth's equatorial plane.
In modern astronomy, the sky (celestial sphere) is divided into 88 regions called constellations, generally based on the asterisms (which are also called "constellations") of Greek and Roman mythology.