| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z | ||||
| Description | alt | broader | narrower | related |
|---|---|---|---|---|
| Baade-Wesselink method (BaadeWesselinkMethod) | ||||
|
Baade-Wesselink method |
Cepheid
, diameter |
|||
| background (background) | ||||
|
background |
||||
| combine with other terms | ||||
| background noise (backgroundNoise) | ||||
|
background noise |
noise |
cosmic noise
, signal-to-noise ratio , sky noise |
||
| background radiation (backgroundRadiation) | ||||
|
background radiation |
radiation background | radiation |
X-ray background
, cosmic background radiation , cosmic ray , gamma-ray background , microwave background , radio background , ultraviolet background |
Sunyaev-Zeldovich effect
, anisotropy , cosmic noise , sky brightness |
| Bailey type (BaileyType) | ||||
|
Bailey type |
AB variable star | RR Lyrae star | ||
| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z | ||||
| Description | alt | broader | narrower | related |
| bailys bead (bailysBead) | ||||
|
Baily's bead |
Sun
, diamond ring effect , solar eclipse |
|||
| Baker-Nunn camera (BakerNunnCamera) | ||||
|
Baker-Nunn camera |
catadioptric system
, meteor camera , reflecting telescope , wide-field telescope |
Bouwers telescope
, Schmidt telescope |
||
| balloon-borne instrument (balloonBorneInstrument) | ||||
|
balloon-borne instrument |
balloon borne instrument |
X-ray astronomy
, airplane-borne instrument , cosmic ray astronomy , gamma-ray astronomy , ground-based astronomy , rocket-borne instrument , satellite-borne instrument , space probe instrument , space telescope , ultraviolet astronomy |
||
| Balmer continuum (BalmerContinuum) | ||||
|
Balmer continuum |
hydrogen spectrum | Balmer series | ||
| Balmer limit (BalmerLimit) | ||||
|
Balmer limit |
Balmer series | |||
| Balmer series (BalmerSeries) | ||||
|
Balmer series |
Balmer line | hydrogen spectrum |
H alpha
, H beta , H delta , H epsilon , H gamma , Balmer limit |
absorption spectrum
, Balmer continuum , Brackett series , Lyman series , Paschen series , Pfund series |
| barium (barium) | ||||
|
barium (atomic number 56) |
Ba | fundamental chemical element | barium star | |
| FVH: new (2007-OCT-25) | ||||
| barium star (bariumStar) | ||||
|
barium star |
Ba II star | star | semi-barium star |
S star
, barium , heavy metal star |
| barometer (barometer) | ||||
|
barometer |
measuring instrument |
pressure
, weather station |
||
| FVH: new (2007-SEP-21) | ||||
| barred spiral galaxy (barredSpiralGalaxy) | ||||
|
barred spiral galaxy |
galaxy
, spiral galaxy |
B galaxy | ||
| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z | ||||
| Description | alt | broader | narrower | related |
| baryon (baryon) | ||||
|
baryon |
elementary particle |
Omega baryon
, quark |
||
| baryonic Dark Matter (baryonicDarkMatter) | ||||
|
baryonic Dark Matter |
Dark Matter | cold Dark Matter | ||
| basin (basin) | ||||
|
basin |
crater | |||
| B band (BBand) | ||||
|
B band |
Fraunhofer line
, molecular band |
molecular spectrum | ||
| B dwarf (BDwarf) | ||||
|
B dwarf star |
B star
, dwarf |
gamma Cassiopeiae star | ||
| beam switching (beamSwitching) | ||||
|
beam switching |
radio telescope | |||
| beam waveguide (beamWaveguide) | ||||
|
beam waveguide |
collimator | |||
| beamwidth (beamwidth) | ||||
|
beamwidth |
angular resolution
, polar diagram , radio telescope |
|||
| bediasite (bediasite) | ||||
|
bediasite |
meteorite
, tektite |
australite
, chondrite , moldavite |
||
| berkelium (berkelium) | ||||
|
berkelium (atomic number 97) |
Bk | fundamental chemical element | ||
| FVH: new (2007-OCT-25) | ||||
| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z | ||||
| Description | alt | broader | narrower | related |
| beryllium (beryllium) | ||||
|
beryllium (atomic number 4) |
Be | fundamental chemical element | ||
| FVH: new (2007-OCT-25) | ||||
| Besselian epoch (BesselianEpoch) | ||||
|
Besselian epoch |
epoch
, standard epoch |
Julian epoch
, time |
||
| Bessel photometry (BesselPhotometry) | ||||
|
Bessel photometry |
Bessel UBVRI photometry |
broad band photometry
, photometric system |
BV photometry
, B magnitude , I magnitude , Johnson photometry , R magnitude , U magnitude , V magnitude |
|
| FVH: new (2007-SEP-21) | ||||
| Be star (BeStar) | ||||
|
Be star |
Be dwarf star |
B star
, Herbig AeBe star , early-type emission star |
Herbig AeBe star
, lambda eridani star |
Ae star
, circumstellar shell |
| FVH: moved Be_dwarf to ALT and U Herbig_star to BT HERBIG_AeBe_STARS (2007-OCT-1) | ||||
| beta Cephei star (betaCepheiStar) | ||||
|
beta Cephei star |
beta Canis Majoris star |
early-type variable star
, multi-periodic variable star , pulsating variable star , short period variable star |
non-radial pulsation
, radial pulsation |
|
| beta Lyrae star (betaLyraeStar) | ||||
|
beta Lyrae star |
close binary star
, contact binary star , eclipsing binary star , ellipsoidal variable star |
|||
| B galaxy (BGalaxy) | ||||
|
barred galaxy (Yerkes classification scheme) |
barred spiral galaxy | Yerkes classification | ||
| FVH+AG: new (2007-OCT-26) | ||||
| B giant (BGiant) | ||||
|
B giant star |
B star
, giant |
|||
| Bianchi cosmology (BianchiCosmology) | ||||
|
Bianchi cosmology |
cosmology | |||
| bias calibration (biasCalibration) | ||||
|
bias calibration |
calibration | CCD detector | ||
| FVH: new (2007-OCT-3) | ||||
| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z | ||||
| Description | alt | broader | narrower | related |
| Big Bang theory (BigBangTheory) | ||||
|
Big Bang theory |
cosmology |
Friedmann universe
, Hubble radius , Hubble time , Lemaitre universe , closed universe , early universe , hadron barrier , open universe , primordial fireball , relativistic velocity , steady-state theory |
||
| binary pulsar (binaryPulsar) | ||||
|
binary pulsar |
pulsar | |||
| binary star (binaryStar) | ||||
|
binary star |
binaries
, double star |
binary system
, star |
Algol variable star
, RS Canum Venaticorum star , astrometric binary star , close binary star , contact binary star , detached binary star , eclipsing binary star , ellipsoidal variable star , eruptive binary star , interacting binary star , semi-detached binary star , spectroscopic binary star , visual binary star , wide binary star |
accretion
, apocenter , center of mass , companion star , dynamical parallax , inclination , mass-loss , mass-ratio , multiple star , occultation , orbit determination , orbit , period , period change , period determination , phase wave , position angle , runaway star , semimajor axis , separation , two-body problem , von Zeipel theorem |
| only the broad classes are shown below; specific type will be found under these, or from the hierarchical list | ||||
| binary system (binarySystem) | ||||
|
binary system |
binary star
, double galaxy |
|||
| biology (biology) | ||||
|
biology |
scientific field |
astrobiology
, space biology |
||
| bipolar galaxy (bipolarGalaxy) | ||||
|
bipolar galaxy |
galaxy | |||
| bipolar group (bipolarGroup) | ||||
|
bipolar group |
sunspot group | sunspot | ||
| bipolar nebula (bipolarNebula) | ||||
|
bipolar nebula |
nebula | bipolar outflow | ||
| bipolar outflow (bipolarOutflow) | ||||
|
bipolar outflow |
bipolar flow | mass-loss |
bipolar nebula
, circumstellar matter , radio source , radio structure |
|
| birth rate (birthRate) | ||||
|
birth rate |
mass function
, protostar , star formation , stellar evolution |
|||
| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z | ||||
| Description | alt | broader | narrower | related |
| bismuth (bismuth) | ||||
|
bismuth (atomic number 83) |
Bi | fundamental chemical element | ||
| FVH: new (2007-OCT-25) | ||||
| black body radiation (blackBodyRadiation) | ||||
|
black body radiation |
thermal black body radiation | electromagnetic radiation |
brightness temperature
, emissivity , thermal radiation , ultraviolet radiation |
|
| black dwarf (blackDwarf) | ||||
|
black dwarf star |
dwarf
, low-mass star , stellar object |
white dwarf | ||
| black hole (blackHole) | ||||
|
black hole |
collapsed star
, compact object , degenerate matter , relativistic star |
Kerr black hole
, stellar black hole |
Hawking radiation
, Kruskal diagram , Penrose process , Schwarzschild radius , X-ray binary star , accretion disk , ergosphere , event horizon , galactic nucleus , gravitational collapse , gravitational lensing , massive object , naked singularity , relativistic astrophysics , space-time singularity , supernova remnant , white hole |
|
| blank field (blankField) | ||||
|
blank field |
galaxy void | |||
| blazar (blazar) | ||||
|
blazar |
active galactic nucleus |
BL Lacertae object
, quasar |
||
| Blazhko effect (BlazhkoEffect) | ||||
|
Blazhko effect |
RR Lyrae star | |||
| BL Herculis star (BlHerculisStar) | ||||
|
BL Herculis star |
W Virginis star
, pulsating variable star |
Cepheid
, RR Lyrae star , radial pulsation |
||
| blink comparator (blinkComparator) | ||||
|
blink comparator |
instrument | |||
| blinking (blinking) | ||||
|
blinking |
||||
| combine with other terms | ||||
| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z | ||||
| Description | alt | broader | narrower | related |
| BL Lacertae object (BlLacertaeObject) | ||||
|
BL Lacertae object |
BL Lac object |
compact object
, extragalactic radio source , galaxy , variable source |
Seyfert galaxy
, active galactic nucleus , blazar , compact galaxy , quasar |
|
| blue galaxy (blueGalaxy) | ||||
|
blue galaxy |
blue object
, galaxy |
|||
| blue loop (blueLoop) | ||||
|
blue loop |
giant branch | |||
| ES: new (2007-OCT-8) | ||||
| blue object (blueObject) | ||||
|
blue object |
blue galaxy | |||
| blueshift (blueshift) | ||||
|
blueshift |
blue shift
, blue-shift |
Doppler effect
, line shift |
frequency shift | |
| blue straggler star (blueStragglerStar) | ||||
|
blue straggler star |
main sequence star
, young star |
open star cluster | ||
| B magnitude (BMagnitude) | ||||
|
B magnitude |
apparent magnitude |
Bessel photometry
, Johnson photometry |
||
| Bodes law (BodesLaw) | ||||
|
Bode's law |
Titius-Bode law |
Solar System
, distance , planet |
||
| bohrium (bohrium) | ||||
|
bohrium (atomic number 107) |
Bh | fundamental chemical element | ||
| FVH: new (2007-OCT-25) | ||||
| Bok globule (BokGlobule) | ||||
|
Bok globule |
dark nebula
, globule , interstellar matter |
H II region
, cometary globule , protostar , star formation |
||
| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z | ||||
| Description | alt | broader | narrower | related |
| bolide (bolide) | ||||
|
bolide |
meteor | fireball | ||
| bolometer (bolometer) | ||||
|
bolometer |
instrument |
bolometric correction
, photometer , radiation , radiometer |
||
| bolometric correction (bolometricCorrection) | ||||
|
bolometric correction |
bolometer | |||
| boron (boron) | ||||
|
boron (atomic number 5) |
B | fundamental chemical element | ||
| FVH: new (2007-OCT-25) | ||||
| Bose-Einstein nucleus (BoseEinsteinNucleus) | ||||
|
Bose-Einstein nucleus |
nucleus atom |
Bose-Einstein statistics
, Fermi-Dirac nucleus |
||
| Bose-Einstein statistics (BoseEinsteinStatistics) | ||||
|
Bose-Einstein statistics |
Bose-Einstein nucleus
, Fermi-Dirac statistics , boson |
|||
| boson (boson) | ||||
|
boson |
elementary particle
, particle |
alpha particle
, composite particle , meson , photon , pion |
Bose-Einstein statistics
, fermion , hadron , lepton |
|
| boundary layer (boundaryLayer) | ||||
|
boundary layer |
atmosphere
, planet |
|||
| bound-free transition (boundFreeTransition) | ||||
|
bound-free transition |
bound free transition |
absorption line
, absorption spectrum |
||
| Bouwers telescope (BouwersTelescope) | ||||
|
Bouwers telescope |
catadioptric system
, reflecting telescope |
Baker-Nunn camera
, Maksutov telescope , wide-field telescope |
||
| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z | ||||
| Description | alt | broader | narrower | related |
| bow shock (bowShock) | ||||
|
bow-shock |
shock wave | |||
| Bp star (BpStar) | ||||
|
Bp star |
B star
, magnetic star , peculiar star |
|||
| Brackett series (BrackettSeries) | ||||
|
Brackett series |
hydrogen spectrum
, infrared radiation |
Balmer series
, Lyman series , Paschen series , Pfund series |
||
| bremsstrahlung (bremsstrahlung) | ||||
|
bremsstrahlung |
free free transition
, free-free transition |
electromagnetic radiation |
electron
, radiation mechanism , spectrum , synchrotron radiation |
|
| bridge (bridge) | ||||
|
bridge |
||||
| between galaxy | ||||
| bright galaxy (brightGalaxy) | ||||
|
bright galaxy |
galaxy |
Local Group
, nearby galaxy |
||
| bright nebula (brightNebula) | ||||
|
bright nebula |
nebula | |||
| brightness (brightness) | ||||
|
brightness |
optical property | surface brightness |
bright star
, illumination , integration time , intensity , luminosity , magnitude |
|
| brightness distribution (brightnessDistribution) | ||||
|
brightness distribution |
||||
| see luminosity distribution | ||||
| brightness temperature (brightnessTemperature) | ||||
|
brightness temperature |
temperature |
black body radiation
, luminosity distribution , optical property |
||
| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z | ||||
| Description | alt | broader | narrower | related |
| bright point (brightPoint) | ||||
|
solar bright point |
Sun | |||
| FVH: new (2007-OCT-29) | ||||
| bright star (brightStar) | ||||
|
bright star |
high-luminosity star
, star |
brightness | ||
| FVH: correction from original IAU to reflect flux, not necessarily luminosity (2007-OCT-1) | ||||
| brillouin scattering (brillouinScattering) | ||||
|
Brillouin scattering |
Mie scattering
, brillouin spectrum |
|||
| brillouin spectrum (brillouinSpectrum) | ||||
|
Brillouin spectrum |
spectrum |
brillouin scattering
, light scattering |
||
| broad band photometry (broadBandPhotometry) | ||||
|
broad-band photometry |
wide-band photometry |
CCD photometry
, photoelectric photometry , photographic photometry |
Bessel photometry
, BV photometry , Cape photometry , Cape RI photometry , Gunn photometry , HST photometry , Johnson photometry , Kron-Cousins photometry , Sloan photometry , infrared photometry , rgb photometry , rgu photometry , two-color photometry , ultraviolet photometry |
medium band photometry
, narrow band photometry |
| FVH: added BESSEL_PHOTOMETRY, GUNN_PHOTOMETRY, HST_PHOTOMETRY, KRON_COUSINS_PHOTOMETRY, SLOAN_PHOTOMETRY (2007-SEP-21) | ||||
| bromine (bromine) | ||||
|
bromine (atomic number 35) |
Br | fundamental chemical element | ||
| FVH: new (2007-OCT-25) | ||||
| brown dwarf (brownDwarf) | ||||
|
brown dwarf |
late-type dwarf
, late-type subdwarf , stellar object |
L dwarf
, L subdwarf , T dwarf , T subdwarf |
dwarf
, low-mass star , planetar |
|
| B star (BStar) | ||||
|
B star |
OB star
, early-type star , young star |
53 Persei star
, B dwarf , B giant , B subdwarf , B supergiant , Be star , Bp star , Bw star , mercury manganese star |
O cluster
, early-type variable star , spectral type |
|
| B subdwarf (BSubdwarf) | ||||
|
B subdwarf star |
B star
, subdwarf |
|||
| B supergiant (BSupergiant) | ||||
|
B supergiant star |
B star
, OB supergiant , early-type supergiant , supergiant |
|||
| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z | ||||
| Description | alt | broader | narrower | related |
| bubble (bubble) | ||||
|
bubble |
interstellar bubble | |||
| bulge (bulge) | ||||
|
bulge |
Galactic bulge | galaxy structure | ||
| combine with other terms | ||||
| Burkert profile (BurkertProfile) | ||||
|
Burkert mass-profile |
mass distribution |
Navarro-Frenk-White profile
, exponential profile , isothermal sphere |
||
| FVH: new (2007-OCT-5) | ||||
| burst (burst) | ||||
|
burst |
X-ray burst
, gamma-ray burst , optical burst , outburst , radio burst , rapid burst |
burster
, flare |
||
| burster (burster) | ||||
|
burster |
X-ray burst
, burst , gamma-ray burst , optical burst , radio burst |
|||
| butterfly diagram (butterflyDiagram) | ||||
|
butterfly diagram |
solar activity
, solar cycle , sunspot cycle , sunspot number , sunspot |
|||
| BV photometry (BvPhotometry) | ||||
|
BV photometry |
broad band photometry
, two-color photometry |
Bessel photometry
, Johnson photometry |
||
| FVH: added NT BESSEL_PHOTOMETRY, moved TWO-COLOR to BT and JOHNSON to NT (2007-SEP-21) | ||||
| Bw star (BwStar) | ||||
|
Bw star |
B star
, helium-poor star |
|||
| BY Draconis star (ByDraconisStar) | ||||
|
BY Draconis star |
flare star | starspot | ||