Term Index (digit or symbol)

Astrophysics (Index)

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Term Index (digit or symbol)

⯓:
- astronomical symbol: traditional symbols specific to astronomy, for Sun, Earth, etc.
*:
- astronomical symbol: traditional symbols specific to astronomy, for Sun, Earth, etc.
⊕:
- astronomical symbol: traditional symbols specific to astronomy, for Sun, Earth, etc.
★:
- astronomical symbol: traditional symbols specific to astronomy, for Sun, Earth, etc.
☉:
- astronomical symbol: traditional symbols specific to astronomy, for Sun, Earth, etc.
☿:
- astronomical symbol: traditional symbols specific to astronomy, for Sun, Earth, etc.
♀:
- astronomical symbol: traditional symbols specific to astronomy, for Sun, Earth, etc.
♁:
- astronomical symbol: traditional symbols specific to astronomy, for Sun, Earth, etc.
♂:
- astronomical symbol: traditional symbols specific to astronomy, for Sun, Earth, etc.
♃:
- astronomical symbol: traditional symbols specific to astronomy, for Sun, Earth, etc.
♄:
- astronomical symbol: traditional symbols specific to astronomy, for Sun, Earth, etc.
♅:
- astronomical symbol: traditional symbols specific to astronomy, for Sun, Earth, etc.
♆:
- astronomical symbol: traditional symbols specific to astronomy, for Sun, Earth, etc.
♇:
- astronomical symbol: traditional symbols specific to astronomy, for Sun, Earth, etc.
⚳:
- astronomical symbol: traditional symbols specific to astronomy, for Sun, Earth, etc.
⛢:
- astronomical symbol: traditional symbols specific to astronomy, for Sun, Earth, etc.
α:
- alpha disk: well-known model of an accretion disk
- spectral index (α): power by which an object's flux depends on frequency
α disk:
- alpha disk: well-known model of an accretion disk
α_CO:
- alpha CO (α_CO): ratio of CO emissions to H₂
Å:
- angstrom (Å): unit of length 10^-10 meters
β:
- beta (β): ratio of plasma pressure to magnetic pressure
- Burnham Double Star Catalogue (BDS,BU): 1906 catalog with multiple star systems and non-orbiting double stars
- spectral index (α): power by which an object's flux depends on frequency
β decay:
- beta decay: radioactivity such that an electron or positron is emitted
β Per:
- Algol (Beta Per,β Per): multiple star system demonstrating effects of mass transfer
β Persei:
- Algol (Beta Per,β Per): multiple star system demonstrating effects of mass transfer
β Pic b:
- Beta Pictoris b (β Pic b): super Jupiter discovered in 2008
β Pictoris:
- Beta Pictoris b (β Pic b): super Jupiter discovered in 2008
βpm:
- rare designator prefixes: designator prefixes generally used for only a few objects
χ² test:
- chi-squared test (χ² test): statistical significance test
Δ:
- Dunlop Double Star Catalogue (DUN): 1829 catalog of double stars viewed from Australia
Δ²_R:
- Lambda-CDM model (ΛCDM,LCDM): Big-Bang cosmological model with a cosmological constant and cold dark matter
ε:
- nuclear energy generation rate (ε): fusion power per unit mass
ε Ind:
- Epsilon Indi (ε Indi,ε Ind): nearby star system including two brown dwarf companions
ε Indi:
- Epsilon Indi (ε Indi,ε Ind): nearby star system including two brown dwarf companions
η:
- chirp mass (M_c,ℳ): a reduced-mass-like quantity that relates to gravitational waves
γ:
- Lorentz transformation: equations describing the effect of relative motion on length and velocity
- specific heat: ratio of added temperature to added heat for a material
ℏ:
- Planck constant (h): quantum of action in quantum mechanics
κ:
- opacity (κ): a measure of opaqueness of a material
- permeability (κ,k): ability of a material to allow fluids to pass through it
κ-mechanism:
- kappa mechanism (κ-mechanism): stellar instability caused by opacity increasing with temperature
&Lambda:
- neutron star merger: two neutron stars meeting and forming one
Λ:
- cosmological constant (Λ): force counteracting the universe's inward gravitational pull
- eigenvalue (λ): ratio between a vector and a linear transformation of that vector
- Jeans parameter (λ): ratio measuring a tendency of an atmosphere to escape
λ Boo:
- Lambda Boötis star (λ Boo): peculiar star with metallicity only with lighter elements
ΛCDM:
- Lambda-CDM model (ΛCDM,LCDM): Big-Bang cosmological model with a cosmological constant and cold dark matter
ℳ:
- chirp mass (M_c,ℳ): a reduced-mass-like quantity that relates to gravitational waves
μ:
- distance modulus (μ): apparent magnitude minus absolute magnitude
- mass ratio (μ,q): ratio of masses of two objects such as a binary star
- mean molecular weight (μ): measurement of a gas usual for approximating in gas models
- standard gravitational parameter (μ): a body's mass times the gravitational constant
μFUN:
- MicroFUN (μFUN): observers following up on microlensing events in the galactic bulge
μGal:
- Gal: gravimetry unit of the effect of a planet's gravity
μK:
- kelvin (K): temperature scale starting at absolute zero
ν:
- neutrino (ν): light, electrically neutral elementary particle
- wavenumber (ν): reciprocal of wavelength
Ω:
- critical density (ρ_c): density of the universe which leaves it flat
- solid angle (Ω): two-dimensional analog of an angle
Ω-m:
- siemens (S): SI unit of electrical conductance
Ω_Λ:
- Lambda-CDM model (ΛCDM,LCDM): Big-Bang cosmological model with a cosmological constant and cold dark matter
Ω₀:
- critical density (ρ_c): density of the universe which leaves it flat
Ω_b:
- Lambda-CDM model (ΛCDM,LCDM): Big-Bang cosmological model with a cosmological constant and cold dark matter
Ω_bh²:
- Lambda-CDM model (ΛCDM,LCDM): Big-Bang cosmological model with a cosmological constant and cold dark matter
Ω_dΩ_c:
- Lambda-CDM model (ΛCDM,LCDM): Big-Bang cosmological model with a cosmological constant and cold dark matter
Ω_dh²:
- Lambda-CDM model (ΛCDM,LCDM): Big-Bang cosmological model with a cosmological constant and cold dark matter
Ω_m:
- Lambda-CDM model (ΛCDM,LCDM): Big-Bang cosmological model with a cosmological constant and cold dark matter
Öpik-Oort Cloud:
- Oort Cloud: cloud of comets and minor planets around the solar system
Φ:
- double star designation: Systems and format of double star designators
- gravitational potential (Φ): conceptual field indicating the strength of gravity at each point
- magnetic flux (Φ): total magnetism passing through a surface
Φ_Tidal:
- tide: effect of Moon's gravity on Earth's seas, etc.
π:
- pion (π): first type of meson discovered
ρ_c:
- critical density (ρ_c): density of the universe which leaves it flat
Σ:
- sigma (σ): indication of the confidence level of an experiment
- Stefan-Boltzmann constant (σ): relates radiation power to temperature and surface area
- Struve Catalogs: two catalogs of double stars
- surface density (Σ): quantity such as mass per surface area
- velocity dispersion (σ): statistical dispersion of velocities of a group of objects
τ:
- Lambda-CDM model (ΛCDM,LCDM): Big-Bang cosmological model with a cosmological constant and cold dark matter
- optical depth (τ): a measure of opaqueness of a path of light
- pulsar characteristic age (τ): approximate age determination of a pulsar based upon rotation rate
- Thomson optical depth (τ_T,τ): a measure of effects of Thomson scattering
- timescale (t,τ): general length of time something takes
τ_advec:
- advection: transport of something through a fluid's motion
τ_KH:
- Kelvin-Helmholtz timescale (KH timescale,KH time,τ_KH): time that would radiate away a body's heat energy given its luminosity
τ_T:
- Thomson optical depth (τ_T,τ): a measure of effects of Thomson scattering
ϒ:
- mass-to-light ratio (M/L,ϒ): measure of a population of stars or region
ζ Aurigae:
- binary star: system of two stars co-orbiting
ζ Aurigae system:
- binary star: system of two stars co-orbiting
*α² Canum Venticorum variable:
- variable star: star that varies in magnitude
0ES:
- HEAO-2: 1978 X-ray observatory space mission
0FGL:
- Fermi (FGST,GLAST): satellite for studying gamma rays
1 Ceres:
- asteroid: minor planet without comet characteristics
- Ceres: dwarf planet and largest asteroid
- dwarf planet: round like a planet, only smaller
1 Jansky Empty Field Survey (1 Jy): survey to find optical identifications for weak radio sources
1 Jy:
- 1 Jansky Empty Field Survey (1 Jy): survey to find optical identifications for weak radio sources
1-point function:
- N-point function: general term for analyses-techniques of spatial data
1.27m Mount Stromlo Telescope:
- MACHO Project: survey searching out microlensing that could indicate a MACHO
1.3-mm observation: observation frequency useful for detecting dust
1.5m Hale Telescope:
- coudé focus telescope: type of Nasmyth telescope with additional mirrors
1/f noise:
- red noise: noise tending toward lower frequencies
1/V_max method:
- volume weighting: method of accommodating the Malmquist bias
10 Hygiea:
- asteroid: minor planet without comet characteristics
101955 Bennu: near-Earth asteroid that is the target of a sample-return mission
- OSIRIS-REx: space mission aiming to return a sample of an asteroid
10199 Chariklo: largest minor planet in the outer solar system
1050cm:
- Parkes Observatory: Australian large single-dish radio telescope
10C:
- Cambridge Catalog of Radio Sources (C): series of catalogs of northern hemisphere sources
- Third Cambridge Catalogue of Radio Sources (3C): 1959 catalog of northern hemisphere 159MHz sources
134340 Pluto:
- dwarf planet: round like a planet, only smaller
- Kuiper Belt (K Belt,KB): further part of solar system beyond Neptune
- Pluto: dwarf planet formerly listed as one of the nine planets
- trans-Neptunian object (TNO): minor planet beyond Neptune
136108 Haumea:
- dwarf planet: round like a planet, only smaller
- Kuiper Belt (K Belt,KB): further part of solar system beyond Neptune
- trans-Neptunian object (TNO): minor planet beyond Neptune
136199 Eris:
- dwarf planet: round like a planet, only smaller
- Kuiper Belt (K Belt,KB): further part of solar system beyond Neptune
- trans-Neptunian object (TNO): minor planet beyond Neptune
136472 Makemake:
- dwarf planet: round like a planet, only smaller
- Kuiper Belt (K Belt,KB): further part of solar system beyond Neptune
- trans-Neptunian object (TNO): minor planet beyond Neptune
13MM:
- Parkes Observatory: Australian large single-dish radio telescope
140 Foot Telescope:
- Green Bank 140 Foot Telescope: West Virginia radio telescope
150 megaparsecs:
- baryon acoustic oscillations (BAO): density fluctuations stemming from acoustic waves in the early universe
15760 1992 QB1₁:
- Kuiper Belt (K Belt,KB): further part of solar system beyond Neptune
15760 Albion:
- Kuiper Belt (K Belt,KB): further part of solar system beyond Neptune
16 Psyche:
- Psyche: planned space mission to orbit an asteroid
16-pole:
- multipole expansion: series expansion of a function over the surface of a sphere
18 cm line:
- hydroxyl (OH): neutral compound of hydrogen and oxygen, one atom each
1947 sunspot: largest sunspot ever recorded
1987A:
- SN 1987A (1987A): supernova in February 1987 rare for being visible by the naked eye
1992 QB1₁:
- Kuiper Belt (K Belt,KB): further part of solar system beyond Neptune
1999 RQ₃₆:
- 101955 Bennu: near-Earth asteroid that is the target of a sample-return mission
- OSIRIS-REx: space mission aiming to return a sample of an asteroid
19P/Borrelly:
- Deep Space 1 (DS1): 1998-2001 mission to fly by asteroid
1A:
- Ariel 5: 1970s X-ray space telescope
1AGL:
- AGILE: Italian space gamma-ray observatory
1C:
- Cambridge Catalog of Radio Sources (C): series of catalogs of northern hemisphere sources
1D climate model:
- one dimensional climate model: atmospheric model ignoring all horizontal motion
1D model:
- one dimensional climate model: atmospheric model ignoring all horizontal motion
- three dimensional model: computer simulation handling variation in all three dimensions
1E:
- HEAO-2: 1978 X-ray observatory space mission
1E 6057-556:
- Bullet Cluster: example of two galaxy clusters in collision
1ES:
- HEAO-2: 1978 X-ray observatory space mission
1FGL:
- Fermi (FGST,GLAST): satellite for studying gamma rays
1H:
- HEAO-1: 1977 X-ray observatory space mission
1RXH:
- ROSAT: 1990s German space X-ray telescope
1RXS:
- ROSAT: 1990s German space X-ray telescope
1SWASP:
- SuperWASP (SWASP): broad Earth-based search for transiting planets
1SWASP J140747:
- J1407: star orbited by a companion with a ring system
1SWASP J140747.93-394542.86:
- J1407: star orbited by a companion with a ring system
2 Pallas:
- asteroid: minor planet without comet characteristics
2-point correlation function:
- N-point function: general term for analyses-techniques of spatial data
2-point function:
- N-point function: general term for analyses-techniques of spatial data
20000 Varuna:
- Kuiper Belt (K Belt,KB): further part of solar system beyond Neptune
2002 AW₁₉₇:
- Kuiper Belt (K Belt,KB): further part of solar system beyond Neptune
2002 TC₃₀₂:
- trans-Neptunian object (TNO): minor planet beyond Neptune
2002 TX₃₀₀:
- Kuiper Belt (K Belt,KB): further part of solar system beyond Neptune
2002 UX₂₅:
- Kuiper Belt (K Belt,KB): further part of solar system beyond Neptune
2003 VB₁₂:
- Sedna: distant solar system planetoid discovered in 2003
2012 VB₁₁₃:
- Kuiper Belt (K Belt,KB): further part of solar system beyond Neptune
2014 MU₆₉:
- New Horizons (NF1): explorer spaceship sent to Pluto
21-cm experiment: search for redshifted 21-cm hydrogen emission lines
21-cm line: hydrogen line useful for determining redshift
- HI 4-Pi Survey (HI4PI): HI map based upon EBHIS and GASS
- self-absorption: EMR absorption by the same substance that emitted it
- spin (m_s): an angular-momentum quantum number
243 Ida:
- binary minor planet (BMP): minor planet with another body orbiting it
- Galileo: circa 1990s space mission to Jupiter
25m Dwingeloo Radio Telescope:
- Dwingeloo Obscured Galaxy Survey (DOGS): radio survey of ZOA for 21-cm lines indicating galaxies
26-Meter Telescope:
- Dominion Radio Astrophysical Observatory (DRAO): radio observatory in British Columbia, Canada
26P/Grigg-Skjellerup:
- Giotto: 1980s space mission carrying out a Comet Halley flyby
28978 Ixion:
- trans-Neptunian object (TNO): minor planet beyond Neptune
2A:
- Ariel 5: 1970s X-ray space telescope
2C:
- Cambridge Catalog of Radio Sources (C): series of catalogs of northern hemisphere sources
2D model:
- subgrid-scale physics: shortcuts handling physics on a smaller scale than a simulation's grid
- three dimensional model: computer simulation handling variation in all three dimensions
2dF:
- 2dF Galaxy Redshift Survey (2dFGRS): imaging survey of 300,000 objects
- 2dF-SDSS LRG and QSO survey (2SLAQ): spectroscopic survey of distant galaxies
- Anglo-Australian Telescope (AAT): 3.9 m reflector telescope in Australia
- Dark Energy Survey (DES): survey aimed at mapping the universe's expansion
- DEVILS: visible-light spectrographic survey of 56k distant galaxies
- fiber positioner: machine to set up fibers in multi-object spectrograph
- GALAH: survey of Milky Way with an emphasis on old structures
- Hawaii K-band Galaxy Survey: near-infrared survey of a selection of fields
- WiggleZ: survey aimed at mapping dark energy
2dF Galaxy Redshift Survey (2dFGRS): imaging survey of 300,000 objects
2dF-SDSS LRG and QSO survey (2SLAQ): spectroscopic survey of distant galaxies
2dFGRS:
- 2dF Galaxy Redshift Survey (2dFGRS): imaging survey of 300,000 objects
2E:
- HEAO-2: 1978 X-ray observatory space mission
2FGL:
- Fermi (FGST,GLAST): satellite for studying gamma rays
2HWC:
- High-altitude Water Cherenkov Observatory (HAWC): gamma ray telescope using Cherenkov radiation
2M:
- Two Micron All-sky Survey (2MASS): near-infrared survey of both hemispheres
2MA:
- Two Micron All-sky Survey (2MASS): near-infrared survey of both hemispheres
2MASP:
- Two Micron All-sky Survey (2MASS): near-infrared survey of both hemispheres
2MASS:
- JHK photometric system (JHK): system to classify stars according to near-infrared colors
- Two Micron All-sky Survey (2MASS): near-infrared survey of both hemispheres
2MASS 0720-0846:
- Scholz's Star: nearby binary star with red dwarf and brown dwarf
2MASS 1207:
- TW Hydrae association (TWA): nearby stellar association
2MASS J0445930-1516166:
- LHS 1140: red dwarf with rocky planet in its habitable zone
2MASS J07200325-0846499:
- Scholz's Star: nearby binary star with red dwarf and brown dwarf
2MASS J16264502-2423077:
- Elias 2-27: much-studied YSO
2MASS J23062928-0502285:
- TRAPPIST-1: red dwarf with exoplanet near the habitable zone
2MASS J2530084+1652532:
- Teegarden's Star: nearby red dwarf
2MASS photometric system:
- JHK photometric system (JHK): system to classify stars according to near-infrared colors
2MASSI:
- Two Micron All-sky Survey (2MASS): near-infrared survey of both hemispheres
2MASSW:
- Two Micron All-sky Survey (2MASS): near-infrared survey of both hemispheres
2MASX:
- Two Micron All-sky Survey (2MASS): near-infrared survey of both hemispheres
2MUCD:
- Two Micron All-sky Survey (2MASS): near-infrared survey of both hemispheres
2SLAQ:
- 2dF-SDSS LRG and QSO survey (2SLAQ): spectroscopic survey of distant galaxies
2U:
- Uhuru: 1970 satellite X-ray telescope
3 Juno:
- asteroid: minor planet without comet characteristics
3-point correlation function:
- N-point function: general term for analyses-techniques of spatial data
3-point function:
- N-point function: general term for analyses-techniques of spatial data
30 Doradus:
- SAGE: survey of gas and dust in the Magellanic Clouds
- VLT-FLAMES Tarantula Survey (VFTS): VLT spectroscopic survey of massive stars
32-pole:
- multipole expansion: series expansion of a function over the surface of a sphere
38628 Huya:
- Kuiper Belt (K Belt,KB): further part of solar system beyond Neptune
3A:
- Ariel 5: 1970s X-ray space telescope
3C:
- Third Cambridge Catalogue of Radio Sources (3C): 1959 catalog of northern hemisphere 159MHz sources
3C 273: first quasar discovered
3C 295: distant radio galaxy
3C 303: Seyfert galaxy
3C 327: elliptical radio galaxy
3C 400:
- W51: cloud complex radio source
3C 405:
- Cygnus A (3C 405,QSO B1957+405): early-discovered radio galaxy and quasar
3C 48: radio galaxy/quasar
3C 9: first quasar discovered
3CR:
- Third Cambridge Catalogue of Radio Sources (3C): 1959 catalog of northern hemisphere 159MHz sources
3CRR:
- Third Cambridge Catalogue of Radio Sources (3C): 1959 catalog of northern hemisphere 159MHz sources
3D model:
- subgrid-scale physics: shortcuts handling physics on a smaller scale than a simulation's grid
- three dimensional model: computer simulation handling variation in all three dimensions
3D-HST: near-infrared survey of 100,000 galaxies by HST
3FHL:
- Fermi (FGST,GLAST): satellite for studying gamma rays
3GM:
- JUICE: mission to Jupiter in development
4 Vesta:
- asteroid: minor planet without comet characteristics
4-metre Multi-object Spectroscopic Telescope:
- 4MOST: spectrograph in development for VISTA telescope
43 Meter Telescope:
- Green Bank 140 Foot Telescope: West Virginia radio telescope
47 Tuc:
- 47 Tucanae (47 Tuc): bright globular cluster
47 Tucanae (47 Tuc): bright globular cluster
4C:
- Fourth Cambridge Catalog of Radio Sources (4C): 1960s catalog of northern hemisphere 178 MHz sources
4LGSF:
- European Southern Observatory Very Large Telescope (ESO VLT,VLT): four 8.2-meter optical telescopes in Chile that can act together
4MOST: spectrograph in development for VISTA telescope
- VISTA: 4.1 meter telescope in Paranal Observatory in Chile
4U:
- Uhuru: 1970 satellite X-ray telescope
50000 Quaoar:
- Kuiper Belt (K Belt,KB): further part of solar system beyond Neptune
51 Eri b:
- 51 Eridani b: Jupiter-like planet discovered in 2015
51 Eridani:
- 51 Eridani b: Jupiter-like planet discovered in 2015
51 Eridani b: Jupiter-like planet discovered in 2015
51 Peg b:
- 51 Pegasi b (51 Peg b): first exoplanet found orbiting a main sequence star
51 Pegasi:
- 51 Pegasi b (51 Peg b): first exoplanet found orbiting a main sequence star
51 Pegasi b (51 Peg b): first exoplanet found orbiting a main sequence star
5335 Damocles:
- damocloid: minor planet with a comet-like orbit
55 Cancri e (55 Cnc e): superearth orbiting a Sun-like star
55 Cnc e:
- 55 Cancri e (55 Cnc e): superearth orbiting a Sun-like star
5535 Annefrank:
- Stardust: space mission that collected and returned comet coma dust
55565 2002AW₁₉₇:
- Kuiper Belt (K Belt,KB): further part of solar system beyond Neptune
55636 2002 TX₃₀₀:
- Kuiper Belt (K Belt,KB): further part of solar system beyond Neptune
55637 UX₂₅:
- Kuiper Belt (K Belt,KB): further part of solar system beyond Neptune
5C:
- Cambridge Catalog of Radio Sources (C): series of catalogs of northern hemisphere sources
60-inch Hale Telescope:
- coudé focus telescope: type of Nasmyth telescope with additional mirrors
67P:
- 67P/Churyumov-Gerasimenko (67P,67P/C-G): comet visited by Rosetta space mission
- CAESAR: planned space mission to return a sample of a comet
- Rosetta: space probe that visited a comet
67P/C-G:
- 67P/Churyumov-Gerasimenko (67P,67P/C-G): comet visited by Rosetta space mission
- CAESAR: planned space mission to return a sample of a comet
- Rosetta: space probe that visited a comet
67P/Churyumov-Gerasimenko (67P,67P/C-G): comet visited by Rosetta space mission
- CAESAR: planned space mission to return a sample of a comet
- Rosetta: space probe that visited a comet
6C:
- Cambridge Catalog of Radio Sources (C): series of catalogs of northern hemisphere sources
6dF:
- 6dF Galaxy Survey (6dFGS): UKST survey of galaxies in the southern sky
- UK Schmidt Telescope (UKST): 1.2 meter telescope in Australia with wide field-of-view
6dF Galaxy Survey (6dFGS): UKST survey of galaxies in the southern sky
6dFGS:
- 6dF Galaxy Survey (6dFGS): UKST survey of galaxies in the southern sky
775 AD event: apparent solar eruption, based upon tree-ring evidence
7C:
- Cambridge Catalog of Radio Sources (C): series of catalogs of northern hemisphere sources
84522 2002 TC₃₀₂:
- trans-Neptunian object (TNO): minor planet beyond Neptune
87GB:
- 87GB Catalog of Radio Sources (87GB): 1980s Green Bank radio survey
87GB Catalog of Radio Sources (87GB): 1980s Green Bank radio survey
8C:
- Cambridge Catalog of Radio Sources (C): series of catalogs of northern hemisphere sources
90377 Sedna:
- Sedna: distant solar system planetoid discovered in 2003
- trans-Neptunian object (TNO): minor planet beyond Neptune
90482 Orcus:
- moon: a planet's natural satellite, such as Earth's
- trans-Neptunian object (TNO): minor planet beyond Neptune
92-cm line:
- 21-cm line: hydrogen line useful for determining redshift
951 Gaspra:
- Galileo: circa 1990s space mission to Jupiter
9969 Braille:
- Deep Space 1 (DS1): 1998-2001 mission to fly by asteroid
9C:
- Cambridge Catalog of Radio Sources (C): series of catalogs of northern hemisphere sources
2004 XR₁₉₀:
- trans-Neptunian object (TNO): minor planet beyond Neptune
μ:
- permeability (κ,k): ability of a material to allow fluids to pass through it
a:
- semi-major axis (a): maximum radius of an ellipse
b:
- semi-major axis (a): maximum radius of an ellipse
e:
- eccentricity (e): degree to which an orbit is non-circular
l:
- spherical harmonics: harmonic functions on the surface of a sphere
m:
- spherical harmonics: harmonic functions on the surface of a sphere
¹H: hydrogen isotope with no neutrons
¹H burning:
- hydrogen burning: any fusion reaction starting with hydrogen
²H:
- deuterium (D,²H): hydrogen isotope with one neutron
⁴⁴Ti:
- supernova light curve (SN light curve): changing intensity of light following a supernova
⁵⁶Co:
- supernova light curve (SN light curve): changing intensity of light following a supernova
⁵⁶Ni:
- supernova light curve (SN light curve): changing intensity of light following a supernova
⁶⁰Co:
- supernova light curve (SN light curve): changing intensity of light following a supernova
[CH]:
- methylidyne (CH): compound of one carbon and one hydrogen atom
[CI]:
- carbon (C): element, C, atomic number 6
- fine structure: separate spectral lines due to electron spin and relativistic effects
[CII]:
- carbon (C): element, C, atomic number 6
- CONCERTO: spectrometer aimed at mapping the [CII] line
- fine structure: separate spectral lines due to electron spin and relativistic effects
- ionized carbon fine structure line ([CII]): carbon line that traces distant star formation
- Millimeter-wave Intensity Mapping Experiment (mmIME): project to map CO an [CII]
- self-absorption: EMR absorption by the same substance that emitted it
- STARFIRE: planned balloon-borne 2.5 m telescope and spectroscope
- Tomographic Ionized-carbon Mapping Experiment (TIME): proposed instrument to map the [CII] line
[Fe II]:
- iron (Fe): metal, Fe, atomic number 26
[Fe/H]:
- iron (Fe): metal, Fe, atomic number 26
[HI]:
- neutral atomic hydrogen (HI,H I): state of hydrogen when sufficiently cool
[O III]:
- planetary nebula luminosity function (PNLF): model used in distance estimation

Index