87 relations: A-type main-sequence star, Accretion disk, Apparent magnitude, Aratus, Asteroseismology, Astronomy, Barred spiral galaxy, Barycenter, Bayer designation, Beta Leonis Minoris, Binary star, Cancer (constellation), Chinese astronomy, Christian Ludwig Ideler, Constellation, Constellation family, Culmination, Declination, Deep-sky object, Delta Scuti variable, Dwarf nova, Edge (geometry), Equatorial coordinate system, Eugène Joseph Delporte, European Southern Observatory, F-type main-sequence star, Francis Baily, G 117-B15A, G-type main-sequence star, Galaxy Zoo, Giant star, Giuseppe Piazzi, Hanny's Voorwerp, HD 82886, Interacting galaxy, International Astronomical Union, Johann Elert Bode, Johannes Hevelius, Lenticular galaxy, Leo (constellation), Leonis Minorids, Light-year, Lion, Luminosity, Luminous blue variable, Lynx (constellation), Main sequence, Metallicity, Milky Way, Minute and second of arc, ..., Mira variable, Monthly Notices of the Royal Astronomical Society, NGC 3344, NGC 3432, North Pole, Northern Hemisphere, Patrick Moore, Planetary system, Popular Astronomy (US magazine), Ptolemy, Pulsating white dwarf, Quasar, R Leonis Minoris, Red dwarf, Red giant, Richard A. Proctor, Right ascension, RS Canum Venaticorum variable, Semiregular variable star, Solar System, Spiral galaxy, Star, Starburst galaxy, Stefano Borgia, Stellar classification, Supergiant star, Supernova impostor, SX Leonis Minoris, Ursa Major, Velletri, 11 Leonis Minoris, 20 Leonis Minoris, 37 Leonis Minoris, 38 Leonis Minoris, 3C 234, 45th parallel south, 46 Leonis Minoris. Expand index (37 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.
An accretion disk is a structure (often a circumstellar disk) formed by diffused material in orbital motion around a massive central body.
The apparent magnitude of a celestial object is a number that is a measure of its brightness as seen by an observer on Earth.
Aratus (Ἄρατος ὁ Σολεύς; ca. 315 BC/310 BC240) was a Greek didactic poet.
Asteroseismology or astroseismology is the study of oscillations in stars.
Astronomy (from ἀστρονομία) is a natural science that studies celestial objects and phenomena.
A barred spiral galaxy is a spiral galaxy with a central bar-shaped structure composed of stars.
The barycenter (or barycentre; from the Ancient Greek βαρύς heavy + κέντρον centre) is the center of mass of two or more bodies that are orbiting each other, which is the point around which they both orbit.
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 Leonis Minoris (Beta LMi, β Leonis Minoris, β LMi) is a binary star in the constellation of Leo Minor.
A binary star is a star system consisting of two stars orbiting around their common barycenter.
Cancer is one of the twelve constellations of the zodiac.
Astronomy in China has a long history, beginning from the Shang Dynasty (Chinese Bronze Age).
Christian Ludwig Ideler (21 September 1766 – 10 August 1846) was a German chronologist and astronomer.
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.
In astronomy, the culmination of a planet, star, or constellation is its transit over an observer's meridian.
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.
Deep-sky object (abbreviated as DSO) is a term designating any astronomical object that is not an individual star or Solar System object (such as Sun, Moon, planet, comet, etc.). The classification is used for the most part by amateur astronomers to denote visually observed faint naked eye and telescopic objects such as star clusters, nebulae and galaxies.
A Delta Scuti variable (sometimes termed dwarf cepheid) is a variable star which exhibits variations in its luminosity due to both radial and non-radial pulsations of the star's surface.
A U Geminorum-type variable star, or dwarf nova (pl. novae) is a type of cataclysmic variable star consisting of a close binary star system in which one of the components is a white dwarf that accretes matter from its companion.
In geometry, an edge is a particular type of line segment joining two vertices in a polygon, polyhedron, or higher-dimensional polytope.
The equatorial coordinate system is a celestial coordinate system widely used to specify the positions of celestial objects.
Eugène Joseph Delporte (10 January 1882 – 19 October 1955) was a Belgian astronomer born in Genappe.
The European Southern Observatory (ESO) is a 15-nation intergovernmental research organization for ground-based astronomy.
An F-type main-sequence star (F V) is a main-sequence, hydrogen-fusing star of spectral type F and luminosity class V. These stars have from 1.0 to 1.4 times the mass of the Sun and surface temperatures between 6,000 and 7,600 K.Tables VII and VIII.
Francis Baily (28 April 177430 August 1844) was an English astronomer.
G117-B15A is a small, well-observed variable white dwarf star of the DAV, or ZZ Ceti, type in the constellation of Leo Minor.
A G-type main-sequence star (Spectral type: G-V), often (and imprecisely) called a yellow dwarf, or G dwarf star, is a main-sequence star (luminosity class V) of spectral type G. Such a star has about 0.84 to 1.15 solar masses and surface temperature of between 5,300 and 6,000 K., G. M. H. J. Habets and J. R. W. Heintze, Astronomy and Astrophysics Supplement 46 (November 1981), pp.
Galaxy Zoo is a crowdsourced astronomy project which invites people to assist in the morphological classification of large numbers of galaxies.
A giant star is a star with substantially larger radius and luminosity than a main-sequence (or dwarf) star of the same surface temperature.
Giuseppe Piazzi (16 July 1746 – 22 July 1826) was an Italian Catholic priest of the Theatine order, mathematician, and astronomer.
Hanny's Voorwerp, (Dutch for Hanny's object) is a rare type of astronomical object called a quasar ionization echo.
HD 82886 is a sun-like star in the constellation Leo Minor.
Interacting galaxies (colliding galaxies) are galaxies whose gravitational fields result in a disturbance of one another.
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.
Johann Elert Bode (19 January 1747 – 23 November 1826) was a German astronomer known for his reformulation and popularisation of the Titius–Bode law.
Johannes Hevelius Some sources refer to Hevelius as Polish.
A lenticular galaxy (denoted S0) is a type of galaxy intermediate between an elliptical (denoted E) and a spiral galaxy in galaxy morphological classification schemes.
Leo is one of the constellations of the zodiac, lying between Cancer the crab to the west and Virgo the maiden to the east.
Leo Minorids is a weak meteor shower that takes place from October 19 till October 27 each 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.
The lion (Panthera leo) is a species in the cat family (Felidae).
In astronomy, luminosity is the total amount of energy emitted per unit of time by a star, galaxy, or other astronomical object.
Luminous blue variables (LBVs) are massive evolved stars that show unpredictable and sometimes dramatic variations in both their spectra and brightness.
Lynx is a constellation named after the animal, usually observed in the northern sky.
In astronomy, the main sequence is a continuous and distinctive band of stars that appear on plots of stellar color versus brightness.
In astronomy, metallicity is used to describe the abundance of elements present in an object that are heavier than hydrogen or helium.
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.
Mira variables ("Mira", Latin, adj. - feminine form of adjective "wonderful"), named for the prototype star Mira, are a class of pulsating variable stars characterized by very red colours, pulsation periods longer than 100 days, and amplitudes greater than one magnitude in infrared and 2.5 magnitude at visual wavelengths.
Monthly Notices of the Royal Astronomical Society (MNRAS) is a peer-reviewed scientific journal covering research in astronomy and astrophysics.
NGC 3344 is a relatively isolated barred spiral galaxy located 22.5 million light years away in the constellation Leo Minor.
NGC 3432 is a spiral galaxy that can be found in the constellation Leo Minor.
The North Pole, also known as the Geographic North Pole or Terrestrial North Pole, is (subject to the caveats explained below) defined as the point in the Northern Hemisphere where the Earth's axis of rotation meets its surface.
The Northern Hemisphere is the half of Earth that is north of the Equator.
Sir Patrick Alfred Caldwell-Moore (4 March 19239 December 2012) was an English amateur astronomer who attained prominent status in that field as a writer, researcher, radio commentator and television presenter.
A planetary system is a set of gravitationally bound non-stellar objects in or out of orbit around a star or star system.
Popular Astronomy is an American magazine published by John August Media, LLC and hosted at TechnicaCuriosa.com for amateur astronomers.
Claudius Ptolemy (Κλαύδιος Πτολεμαῖος, Klaúdios Ptolemaîos; Claudius Ptolemaeus) was a Greco-Roman mathematician, astronomer, geographer, astrologer, and poet of a single epigram in the Greek Anthology.
A pulsating white dwarf is a white dwarf star whose luminosity varies due to non-radial gravity wave pulsations within itself.
A quasar (also known as a QSO or quasi-stellar object) is an extremely luminous active galactic nucleus (AGN).
R Leonis Minoris (R LMi) is a Mira variable type star in the constellation Leo Minor.
A red dwarf (or M dwarf) is a small and relatively cool star on the main sequence, of M spectral type.
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.
Richard Anthony Proctor (23 March 1837 – 12 September 1888) was an English astronomer.
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.
RS Canum Venaticorum variables are a type of variable star.
Semiregular variable stars are giants or supergiants of intermediate and late spectral type showing considerable periodicity in their light changes, accompanied or sometimes interrupted by various irregularities.
The Solar SystemCapitalization of the name varies.
Spiral galaxies form a class of galaxy originally described by Edwin Hubble in his 1936 work The Realm of the Nebulae(pp. 124–151) and, as such, form part of the Hubble sequence.
A star is type of astronomical object consisting of a luminous spheroid of plasma held together by its own gravity.
A starburst galaxy is a galaxy undergoing an exceptionally high rate of star formation, as compared to the long-term average rate of star formation in the galaxy or the star formation rate observed in most other galaxies.
Stefano Borgia (3 December 1731 – 1804) was an Italian Cardinal, theologian, antiquarian, and historian.
In astronomy, stellar classification is the classification of stars based on their spectral characteristics.
Supergiants are among the most massive and most luminous stars.
Supernova impostors are stellar explosions that appear at first to be a type of supernova but do not destroy their progenitor stars.
SX Leonis Minoris is a dwarf nova of the SU Ursae Majoris type that was first discovered as a 16th magnitude blue star in 1957, before its identity was confirmed as a dwarf nova in 1994.
Ursa Major (also known as the Great Bear) is a constellation in the northern sky, whose associated mythology likely dates back into prehistory.
Velletri (Velitrae, Velester) is an Italian comune in the Metropolitan City of Rome, on the Alban Hills, in Lazio, central Italy.
11 Leonis Minoris (11 LMi) is a star system located 37 light years away from Earth, in the northern constellation of Leo Minor.
20 Leonis Minoris is a binary star system in the northern constellation of Leo Minor.
37 Leonis Minoris is a single, yellow-hued star in the northern constellation of Leo Minor.
38 Leonis Minoris is a binary star system in the northern constellation of Leo Minor.
3C 234 is a Seyfert galaxy with a quasar-like appearance located in the constellation Leo Minor.
The 45th parallel south is a circle of latitude that is 45° south of the Earth's equator.
46 Leonis Minoris (abbreviated 46 LMi), also named Praecipua, is the brightest star in the constellation of Leo Minor.