Astrophysics (Index)About

telescope

(instrument to observe at a distance)

A telescope is an instrument to observe objects and phenomena at a distance from the instrument, presenting a magnified image of the EMR as received from the object itself, gaining some of the advantages of closer observation. Older/traditional usage of the term refers to an optical instrument, but with the development of the ability to sense other EMR bands, the term is used in a wider sense, often qualified, e.g., "radio telescope".

Telescopes are used in and outside astronomy, and within astronomy, both by the generally-interested and by researchers. Such research telescopes come in all sizes but include the larger units with larger diameters (apertures), which give them the ability to resolve more detail and observe fainter (e.g., more distant) objects. The largest optical telescopes are on the order of 10 meters in diameter with telescopes having up to 30 meters in current development (extremely large telescopes). The largest radio telescopes include up to 100-meter diameter units that can be aimed and 300-meter units with limited pointing capability. The atmosphere limits the abilities of telescopes (e.g., atmospheric windows and seeing) which has motivated the development and use of space telescopes.

See list of telescopes.


(astronomy,instrument type)
Further reading:
http://en.wikipedia.org/wiki/Telescope

Referenced by pages:
Anglo-Australian Telescope (AAT)
aberration
Atacama B-Mode Search (ABS)
absorption line
ACBAR
Atacama Cosmology Telescope (ACT)
actuator
AEGIS
airglow
airmass
Airy disk
ALEXIS
Alpha Centauri
altazimuth mount
angular magnification
angular resolution
antenna pattern
adaptive optics (AO)
APASS
aperture
aperture synthesis
Atacama Pathfinder Experiment (APEX)
Automated Planet Finder (APF)
apodization
ARCADE
Archeops
Arecibo Observatory (NAIC)
Ariel 5
All Sky Automated Survey (ASAS)
All Sky Automated Survey for SuperNovae (ASAS-SN)
ASCA
Atacama Submillimeter Telescope Experiment (ASTE)
asterism
astigmatism
astrograph
ASTRO-H
Astrolux
astrometry
Astronet
astronomical catalog
Allen Telescope Array (ATA)
Atacama Desert
Australia Telescope Compact Array (ATCA)
Athena
Australia Telescope Large Area Survey (ATLAS)
ATNF Pulsar Catalogue
back end instrument
barrel distortion
baseline
beam
Berkeley Extreme and Far-UV Spectrometer (BEFS)
BICEP2
BIMA telescope
BlackGEM
Víctor M. Blanco Telescope
BLAST
BOOMERanG
Bruce Proper Motion Survey (BPM)
Large Altazimuth Telescope (BTA-6)
cadence
CALIFA
Combined Array for Research in Millimeter-wave Astronomy (CARMA)
Cassegrain reflector
Cosmic Anisotropy Telescope (CAT)
C-BASS
Cosmic Background Imager (CBI)
CCAT
CCAT-prime (CCAT-p)
CCD
California Extremely Large Telescope (CELT)
Canada-France-Hawaii Telescope (CFHT)
CFHTLS
Compton Gamma Ray Observatory (CGRO)
Llano de Chajnantor Observatory
CHARA
CHEOPS
Cherenkov detector
Canadian Hydrogen Intensity Mapping Experiment (CHIME)
chromatic aberration
Cosmic Lens All-sky Survey (CLASS)
CMB Stage-4 (CMB-S4)
COAST
collecting area
collimator
Colossus Telescope
commensal mode
Compton telescope
confusion limit
constellation
CorMASS
corona
coronagraph
COSMOSOMAS
coudé focus telescope
Caltech Submillimeter Observatory (CSO)
Catalina Sky Survey (CSS)
Cherenkov Telescope Array (CTA)
Cerro Tololo Inter-American Observatory (CTIO)
continuous viewing zone (CVZ)
cylindrical telescope
Dominion Observatory 1420 MHz Source Catalog (DA)
Dall-Kirkham telescope
DASI
Dominion Observatory 10.03 MHz Source Catalog (DB)
Lowell Discovery Telescope (LDT)
Dark Energy Survey (DES)
diffraction
diffraction limited
distortion
deformable mirror (DM)
double star
Dragone telescope
Dominion Radio Astrophysical Observatory (DRAO)
drift scan
DSA-2000
NASA Deep Space Network (NASA DSN)
East Asian Observatory (EAO)
Earth-sized VLBI
European Extremely Large Telescope (E-ELT)
Effelsberg 100-m Radio Telescope
Event Horizon Telescope (EHT)
Einstein Telescope
elevation range
extremely large telescope (ELT)
emissivity
Epsilon Eridani
European Pulsar Timing Array (EPTA)
equatorial mount
eROSITA
European Southern Observatory (ESO)
ESO 3.6m Telescope
European Southern Observatory Very Large Telescope (ESO VLT)
exposure time calculator (ETC)
Extreme Ultraviolet Explorer (EUVE)
European VLBI Network (EVN)
extreme adaptive optics (ExAO)
exit pupil
extra-solar planet
Exo-S
EXOSAT
extended source
FAST
FAUST
Fermi (FGST)
Fast Fourier Transform Telescope
Fenton Hill Observatory (FHO)
field curvature
filter
first light
Fred Lawrence Whipple Observatory (FLWO)
focal length
focal plane
focal plane tilt
4MOST
field of view (FOV)
focal plane array (FPA)
fast radio burst (FRB)
front end instrument
Far Ultraviolet Spectroscopic Explorer (FUSE)
Gaia
galaxy age determination
Galaxy Evolution Explorer (GALEX)
Galileo Observatory
gamma rays (GR)
Green Bank 140 Foot Telescope
Green Bank 300ft Telescope (GB300)
Green Bank Observatory (GBO)
Green Bank Telescope (GBT)
Galactic Emission Mapping (GEM)
Gemini Observatory
Ground-Base Electro-Optical Deep Space Surveillance (GEODSS)
GI2T
grazing incidence optics (GIO)
Greenland Telescope (GLT)
GMAN
Giant Magellan Telescope (GMT)
GRANAT
Gregorian telescope
Guide Star Catalog (GSC)
Giant Segmented Mirror Telescope (GSMT)
Gran Telescopio Canarias (GTC)
guest observer (GO)
HabEx
Hale Telescope
Haleakala Observatory
High Altitude Observatory (HAO)
HATNet
Hawaii K-band Galaxy Survey
HD 189733 b
High Definition Space Telescope (HDST)
Herschel Space Observatory
Herschelian telescope
High Energy Stereoscopic System (HESS)
Hobby-Eberly Telescope (HET)
High Energy Transient Explorer (HETE)
Hipparcos
horizontal coordinate system
hot pixel
Hamburg Schmidt Survey (HS)
Hubble Space Telescope (HST)
Hopkins Ultraviolet Telescope (HUT)
International Cometary Explorer (ICE)
illumination
image stabilization
imaging spectrometer
infrared (IR)
Isaac Newton Group of Telescopes (ING)
Isaac Newton Telescope (INT)
INTEGRAL
interferometer
interferometry
IOTA
Institut de radioastronomie millimétrique (IRAM)
IRAM 30m Telescope
Infrared Survey Facility (IRSF)
IRTF
Infrared Space Observatory (ISO)
Infrared Telescope Maffei (ITM)
International Ultraviolet Explorer (IUE)
Jodrell Bank Observatory (JBO)
James Clerk Maxwell Telescope (JCMT)
KAGRA
Kuiper Airborne Observatory (KAO)
K band
Keck Observatory
KELT
Kepler Telescope
KMOS
Korsch telescope
Kitt Peak National Observatory (KPNO)
LAMOST
Las Campanas Observatory (LCO)
Long Baseline Array (LBA)
Large Binocular Telescope (LBT)
Las Cumbres Observatory (LCO)
Las Campanas Redshift Survey (LCRS)
legacy survey
LABOCA Extended Chandra Deep Field-South Submillimetre Survey (LESS)
Lick Observatory
light pollution
limiting magnitude
LINEAR
liquid mirror telescope
Large Millimeter Telescope (LMT)
Lick Observatory Supernova Search (LOSS)
Livermore Optical Transient Imaging System (LOTIS)
Lowell Observatory
Lowell Proper Motion Survey (G)
Lunar Reconnaissance Orbiter (LRO)
La Silla Observatory (LSO)
LSPE-STRIP
LSPE-SWIPE
LaSilla-QUEST Variability Survey (LSQ)
Rubin Observatory (VRO)
LUVOIR
Lynx
Lyot stop
Large Zenith Telescope (LZT)
MACHO Project
Magellanic Catalogue of Stars (MACS)
Magellan Telescopes
MASCARA
MAST
Mauna Kea
MAXIMA
Mayall 4m Telescope
Magellanic Clouds Photometric Survey (MCPS)
MEarth Project (MEarth)
MeerKAT
MeerLICHT
Mercator Telescope
meridian circle
MERLIN
meteoroid
microwave
Milagro
millimeter astronomy
Mimir
mirror support cell
MMT
MOA
monolithic mirror
Mopra Telescope
MOST
Midcourse Space Experiment (MSX)
multi-object spectrograph
Munich Near-Infrared Cluster Survey (MUNICS)
NANTEN2
National Astronomical Observatory of Japan (NAOJ)
Nasmyth telescope
natural astronomical telescopes
near infrared (NIR)
NEOSSat
New Horizons (NF1)
Newtonian telescope
New Worlds Mission
NGTS
NICER
National Optical Astronomy Observatory (NOAO)
Northern Extended Millimeter Array (NOEMA)
National Radio Astronomy Observatory (NRAO)
Nançay Radio Telescope (NRT)
Nearby Supernova Factory (NSNF)
New Technology Telescope (NTT)
NuSTAR
Orbiting Astronomical Observatory (OAO)
observational astronomy
observatory
occulting bar
off-axis telescope
OIR
Omega Centauri
1.3-mm observation
optical axis
coma
optical interferometer
optics
Roque de los Muchachos Observatory (ORM)
Ooty Radio Telescope (ORT)
Origins Space Telescope (OST)
Owens Valley Radio Observatory (OVRO)
Overwhelmingly Large Telescope (OWL)
Palomar 48 Inch Telescope (P48)
Palomar 60-inch Telescope (P60)
pair telescope
Palomar Observatory
Pan-STARRS
parallax
Paranal Observatory
Parkes Observatory
passband
Planet Crossing Asteroid Survey (PCAS)
pointing error (PE)
phased array
photon counting
pincushion distortion
Pi of the Sky
pipeline
Probing Lensing Anomalies Network (PLANET)
plate scale
Pleiades (M45)
planetary nebula (PN)
POINT-AGAPE
point source
POLARBEAR
position angle (PA)
Palomar Observatory Sky Survey (POSS)
Pre-OmegaTranS (POTS)
primary mirror
prime focus
PRIMUS
point-spread function (PSF)
PSF fitting
Palomar Testbed Interferometer (PTI)
photographic zenith tube (PZT)
QMAP
quad-ridge flare horn (QRFH)
QUaD
QUBIC
QUIET
QUIJOTE
radio astronomy
radiometer equation
radio telescope
RAPTOR
Ritchey-Chrétien telescope (RCT)
reflector telescope
RoboNet
ROSAT
ROTSE
South African Astronomical Observatory (SAAO)
Southern African Large Telescope (SALT)
Saskatoon
surface brightness fluctuation (SBF)
scan speed
Schiefspiegler
Schmidt camera
Schmidt-Newton telescope (SNT)
scintillometry
Supernova Cosmology Project (SCP)
seeing
segmented mirror
sensitivity function (S)
Swedish-ESO Submillimetre Telescope (SEST)
Shane Telescope
Simons Observatory (SO)
SkyMapper
slew
slew survey
Sloan 2.5m Telescope
Space Launch System (SLS)
SkyMapper Southern Survey (SMSS)
Submillimeter Telescope (SMT)
supernova survey
SOFIA
software telescope
Solar and Heliospheric Observatory (SOHO)
solar physics
solar telescope
Solar Orbiter (SolO)
SPACEWATCH
speckle suppression
spectrometry
spectropolarimetry
spectroscope
SPECULOOS
Spektr-R
Spektr-RG (SRG)
SPHEREx
spherical aberration
SPICA
SPIDER
Spitzer Space Telescope (SST)
South Pole Telescope (SPT)
Sardinia Radio Telescope (SRT)
Siding Spring Observatory (SSO)
Swope Supernova Survey (SSS)
STARFIRE
starshade
STAR-X
stellar designation
stray light
Strehl ratio
Space Telescope Science Institute (STScI)
Subaru Telescope
submillimeter astronomy
SuperCOSMOS Sky Survey (SSS)
SuperWASP (SWASP)
Suzaku
Swift
Subaru XMM-Newton Deep Survey (SXDS)
systematic error
Sunyaev-Zel'dovich Array (SZA)
University of Tokyo Atacama Observatory (TAO)
TAROT
Teide Observatory
telescope type
telluric line
Tenerife Experiment
transition edge sensor (TES)
Transiting Exoplanet Survey Satellite (TESS)
THEMIS
three-mirror anastigmat
Thirty Meter Telescope (TMT)
Telescopio Nazionale Galileo (TNG)
TopHat
Terrestrial Planet Finder (TPF)
transient astronomy
transit
transit method
transit telescope
TRAPPIST
Trans-Atlantic Exoplanet Survey (TrES)
TripleSpec (TSpec)
Tubingen Ultraviolet Echelle Spectrometer (TUES)
twinkling
Two Micron All-sky Survey (2MASS)
USNO CCD Astrograph Catalog (UCAC)
Uhuru
Ultraviolet Imaging Telescope (UIT)
United Kingdom Infrared Telescope (UKIRT)
UK Schmidt Survey
UK Schmidt Telescope (UKST)
ultraviolet (UV)
UltraVISTA
USNO
USNO Twin Astrograph
UTMOST
ultraviolet astronomy
UVOIR
Vainu Bappu Observatory (VBO)
Virgo Cluster Catalog (VCC)
visible light
VISTA
Very Long Baseline Array (VLBA)
very-long-baseline interferometry (VLBI)
VLT Survey Telescope (VST)
WASP
James Webb Space Telescope (JWST)
wavefront error (WFE)
Roman Space Telescope (RST)
Wide-field Multi-object Spectrograph (WFMOS)
William Herschel Telescope (WHT)
WIYN 3.5m Telescope
Wolter telescope
Westerbork Synthesis Radio Telescope (WSRT)
Wisconsin Ultraviolet Photo-polarimeter Experiment (WUPPE)
XMM-Newton
XO Project
Yohkoh
Yolo telescope
Zeeman-Doppler imaging (ZDI)

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