Table of Contents
61 relations: Aldebaran, Alpha Cassiopeiae, Alpha Herculis, Arcturus, Astronomical unit, Asymptotic giant branch, Atmosphere, Atomic number, Capella, Carbon star, Chi Cygni, Convection zone, Degenerate matter, Delta Andromedae, Dredge-up, Gacrux, Giant star, Habitable zone, Helium flash, Hertzsprung–Russell diagram, Horizontal branch, Hydrostatic equilibrium, Interstellar medium, Jupiter, Light-year, Main sequence, Mars, Mercury (planet), Metallicity, Mira, Molecular cloud, Nuclear fusion, Photosphere, Planetary nebula, Planetary system, Pollux (star), Potential energy, Red clump, Red supergiant, Red-giant branch, Roche lobe, S-type star, Saturn, Solar granule, Solar mass, Solar radius, Star formation, Stellar classification, Stellar corona, Stellar evolution, ... Expand index (11 more) »
- Red giants
Aldebaran
Aldebaran (lit) is a star located in the zodiac constellation of Taurus.
Alpha Cassiopeiae
Alpha Cassiopeiae or α Cassiopeiae, also named Schedar, is a second-magnitude star in the northern constellation of Cassiopeia.
See Red giant and Alpha Cassiopeiae
Alpha Herculis
Alpha Herculis (α Herculis, abbreviated Alpha Her, α Her), also designated Rasalgethi and 64 Herculis, is a multiple star system in the constellation of Hercules.
See Red giant and Alpha Herculis
Arcturus
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Astronomical unit
The astronomical unit (symbol: au, or AU) is a unit of length defined to be exactly equal to.
See Red giant and Astronomical unit
Asymptotic giant branch
The asymptotic giant branch (AGB) is a region of the Hertzsprung–Russell diagram populated by evolved cool luminous stars. Red giant and asymptotic giant branch are star types.
See Red giant and Asymptotic giant branch
Atmosphere
An atmosphere is a layer of gasses that envelop an astronomical object, held in place by the gravity of the object.
Atomic number
The atomic number or nuclear charge number (symbol Z) of a chemical element is the charge number of an atomic nucleus.
See Red giant and Atomic number
Capella
Capella is the brightest star in the northern constellation of Auriga.
Carbon star
A carbon star (C-type star) is typically an asymptotic giant branch star, a luminous red giant, whose atmosphere contains more carbon than oxygen. Red giant and carbon star are star types.
Chi Cygni
Chi Cygni (Latinised from χ Cygni) is a Mira variable star in the constellation Cygnus, and also an S-type star.
Convection zone
A convection zone, convective zone or convective region of a star is a layer which is unstable due to convection.
See Red giant and Convection zone
Degenerate matter
Degenerate matter occurs when the Pauli exclusion principle significantly alters a state of matter at low temperature.
See Red giant and Degenerate matter
Delta Andromedae
Delta Andromedae, Latinized from δ Andromedae, is a triple star system in the northern constellation of Andromeda.
See Red giant and Delta Andromedae
Dredge-up
A dredge-up is any one of several stages in the evolution of some stars.
Gacrux
Gacrux is the third-brightest star in the southern constellation of Crux, the Southern Cross.
Giant star
A giant star has a substantially larger radius and luminosity than a main-sequence (or dwarf) star of the same surface temperature. Red giant and giant star are star types.
Habitable zone
In astronomy and astrobiology, the habitable zone (HZ), or more precisely the circumstellar habitable zone (CHZ), is the range of orbits around a star within which a planetary surface can support liquid water given sufficient atmospheric pressure.
See Red giant and Habitable zone
Helium flash
A helium flash is a very brief thermal runaway nuclear fusion of large quantities of helium into carbon through the triple-alpha process in the core of low-mass stars (between 0.8 solar masses and 2.0) during their red giant phase.
See Red giant and Helium flash
Hertzsprung–Russell diagram
The Hertzsprung–Russell diagram (abbreviated as H–R diagram, HR diagram or HRD) is a scatter plot of stars showing the relationship between the stars' absolute magnitudes or luminosities and their stellar classifications or effective temperatures.
See Red giant and Hertzsprung–Russell diagram
Horizontal branch
The horizontal branch (HB) is a stage of stellar evolution that immediately follows the red-giant branch in stars whose masses are similar to the Sun's. Red giant and horizontal branch are star types.
See Red giant and Horizontal branch
Hydrostatic equilibrium
In fluid mechanics, hydrostatic equilibrium (hydrostatic balance, hydrostasy) is the condition of a fluid or plastic solid at rest, which occurs when external forces, such as gravity, are balanced by a pressure-gradient force.
See Red giant and Hydrostatic equilibrium
Interstellar medium
The interstellar medium (ISM) is the matter and radiation that exists in the space between the star systems in a galaxy.
See Red giant and Interstellar medium
Jupiter
Jupiter is the fifth planet from the Sun and the largest in the Solar System.
Light-year
A light-year, alternatively spelled light year (ly or lyr), is a unit of length used to express astronomical distances and is equal to exactly 9,460,730,472,580.8 km (Scientific notation: 9.4607304725808 × 1012 km), which is approximately 5.88 trillion mi.
Main sequence
In astronomy, the main sequence is a classification of stars which appear on plots of stellar color versus brightness as a continuous and distinctive band. Red giant and main sequence are star types.
See Red giant and Main sequence
Mars
Mars is the fourth planet from the Sun.
Mercury (planet)
Mercury is the first planet from the Sun and the smallest in the Solar System.
See Red giant and Mercury (planet)
Metallicity
In astronomy, metallicity is the abundance of elements present in an object that are heavier than hydrogen and helium.
Mira
Mira, designation Omicron Ceti (ο Ceti, abbreviated Omicron Cet, ο Cet), is a red-giant star estimated to be 200–300 light-years from the Sun in the constellation Cetus.
Molecular cloud
A molecular cloud, sometimes called a stellar nursery (if star formation is occurring within), is a type of interstellar cloud, the density and size of which permit absorption nebulae, the formation of molecules (most commonly molecular hydrogen, H2), and the formation of H II regions.
See Red giant and Molecular cloud
Nuclear fusion
Nuclear fusion is a reaction in which two or more atomic nuclei, usually deuterium and tritium (hydrogen isotopes), combine to form one or more different atomic nuclei and subatomic particles (neutrons or protons).
See Red giant and Nuclear fusion
Photosphere
The photosphere is a star's outer shell from which light is radiated.
Planetary nebula
A planetary nebula is a type of emission nebula consisting of an expanding, glowing shell of ionized gas ejected from red giant stars late in their lives.
See Red giant and Planetary nebula
Planetary system
A planetary system is a set of gravitationally bound non-stellar objects in or out of orbit around a star or star system.
See Red giant and Planetary system
Pollux (star)
Pollux is the brightest star in the constellation of Gemini.
See Red giant and Pollux (star)
Potential energy
In physics, potential energy is the energy held by an object because of its position relative to other objects, stresses within itself, its electric charge, or other factors.
See Red giant and Potential energy
Red clump
The red clump is a clustering of red giants in the Hertzsprung–Russell diagram at around 5,000 K and absolute magnitude (MV) +0.5, slightly hotter than most red-giant-branch stars of the same luminosity. Red giant and red clump are red giants.
Red supergiant
Red supergiants (RSGs) are stars with a supergiant luminosity class (Yerkes class I) and a stellar classification K or M. They are the largest stars in the universe in terms of volume, although they are not the most massive or luminous. Red giant and Red supergiant are star types.
See Red giant and Red supergiant
Red-giant branch
The red-giant branch (RGB), sometimes called the first giant branch, is the portion of the giant branch before helium ignition occurs in the course of stellar evolution. Red giant and red-giant branch are red giants.
See Red giant and Red-giant branch
Roche lobe
In astronomy, the Roche lobe is the region around a star in a binary system within which orbiting material is gravitationally bound to that star.
S-type star
An S-type star (or just S star) is a cool giant with approximately equal quantities of carbon and oxygen in its atmosphere. Red giant and s-type star are star types.
Saturn
Saturn is the sixth planet from the Sun and the second-largest in the Solar System, after Jupiter.
Solar granule
In solar physics and observation, granules are convection cells in the Sun's photosphere.
See Red giant and Solar granule
Solar mass
The solar mass is a standard unit of mass in astronomy, equal to approximately.
Solar radius
Solar radius is a unit of distance used to express the size of stars in astronomy relative to the Sun.
See Red giant and Solar radius
Star formation
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.
See Red giant and Star formation
Stellar classification
In astronomy, stellar classification is the classification of stars based on their spectral characteristics.
See Red giant and Stellar classification
Stellar corona
A corona (coronas or coronae) is the outermost layer of a star's atmosphere.
See Red giant and Stellar corona
Stellar evolution
Stellar evolution is the process by which a star changes over the course of its lifetime and how it can lead to the creation of a new star.
See Red giant and Stellar evolution
Stellar nucleosynthesis
In astrophysics, stellar nucleosynthesis is the creation of chemical elements by nuclear fusion reactions within stars.
See Red giant and Stellar nucleosynthesis
Subgiant
A subgiant is a star that is brighter than a normal main-sequence star of the same spectral class, but not as bright as giant stars. Red giant and subgiant are star types.
Sun
The Sun is the star at the center of the Solar System.
Supergiant
Supergiants are among the most massive and most luminous stars. Red giant and Supergiant are star types.
Supernova
A supernova (supernovae or supernovas) is a powerful and luminous explosion of a star.
Thermal energy
The term "thermal energy" is used loosely in various contexts in physics and engineering, generally related to the kinetic energy of vibrating and colliding atoms in a substance.
See Red giant and Thermal energy
Triple-alpha process
The triple-alpha process is a set of nuclear fusion reactions by which three helium-4 nuclei (alpha particles) are transformed into carbon.
See Red giant and Triple-alpha process
Variable star
A variable star is a star whose brightness as seen from Earth (its apparent magnitude) changes with time. Red giant and variable star are star types.
See Red giant and Variable star
Venus
Venus is the second planet from the Sun.
White dwarf
A white dwarf is a stellar core remnant composed mostly of electron-degenerate matter. Red giant and white dwarf are star types.
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 ionised helium and highly ionised nitrogen or carbon. Red giant and Wolf–Rayet star are star types.
See Red giant and Wolf–Rayet star
See also
Red giants
- Carbon stars
- Gaia BH2
- HD 34266
- RT Virginis
- Red clump
- Red giant
- Red-giant branch
- Symbiotic binary
- Thorne–Żytkow object
- Tip of the red-giant branch
References
Also known as Class M Red Giant, M giant, M-type giant, Red giant branch star, Red giant star, Red giants, Red-giant, Red-giant branch star, Red-giant branch stars, Red-giant-branch star, Red-giant-branch stars, Shell burning, The red giant.