Worlds of David Darling
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T association
T Tauri
T Tauri star
tachometer
tachyon
taconite
TacTix
tadpole
Tadpole Galaxy
taenite
Taifun
taiga
Tait, Peter Guthrie (1831–1901)
Tait's conjecture
Taiyo
Taiyuan Satellite Launch Center (TSLC)
talc
tally
talus
Tanegashima Space Center
tangent
Tangloids
Tangrams
tank
tannin
tanning
Tansei
tantalum
tape recorder
tapeworm
tar
Tarantula Nebula (NGC 2070, 30 Doradus)
TARDIS
target stars
targeted search
Targeted Search System
Tarry, Gaston (1843–1913)
tarsal
tarsal tunnel syndrome
Tarski, Alfred (1902–1983)
Tartaglia, Niccoló Fontana (1499–1557)
tartaric acid
Tarter, Jill Cornell (1944–)
Task Group on Sample Return from Small Solar System Bodies
taste
TAU (Thousand Astronomical Unit probe)
tau Bootis
tau Ceti
tau lepton
Taurus (constellation)
Taurus (rocket)
Taurus Moving Cluster
tautochrone problem
tautomerism
taxon
taxonomy
Tay-Sachs disease
TDRSS (Tracking and Data Relay Satellite System)
Team Encounter
tears
Tebbutt, Comet (C/1861 J1)
technetium
technetium star
Technical Intelligence Division (TID)
technological developments, influence on extraterrestrial speculation
TECHNOLOGY
tectonic
tectum
teeth
teething
tegmentum
Teilhard de Chardin, Pierre (1881–1955)
tektite
telangiectasia
Teledesic
telegraph
telemetry
teleology
Teleostei
telepathic species
teleportation
telescope
TELESCOPE EQUIPMENT AND TECHNIQUES
telescope mounting
Telescopium (constellation)
Telesto
Telford, Thomas (1757–1834)
Teller, Edward (1908–2003)
telluric lines
tellurium
telomerase
telomere
telophase
Telstar
Tempel, (Ernst) Wilhelm (Leberecht) (1821–1889)
Tempel 1, Comet 9P/
Tempel-Tuttle, Comet 55P/
temperature
temperature, body
temperature inversion
tempering
temple
temporal arteritis
temporal lobe epilepsy
temporal bone
temporal fascia
temporal lobe lability
temporomandibular joint
ten
tendon
Teng Mu
Tenma
tennis elbow
tensile strength
tensor
tensor palati
tentacles
Teodorani, Massimo
tephra
terbium
Tereshkova, Valentina Vladimirovna (1937–)
termination shock
terminal velocity
terminator
termite
terpene
Terra
terracing
terraforming
terrestrial age
terrestrial planet
Terrestrial Planet Finder
TERRIERS (Tomographic Experiment using Radiative Recombinative Ionospheric EUV and Radio Sources)
territoriality
tertiary structure
tesla (T)
Tesla, Nikola (1856–1943)
tesseract
testes
testicular feminization syndrome
testosterone
tetanus
tetany
tether, space
Tethys
tetracycline
tetrahedral number
tetrahedron
tetraktys
tetralogy of Fallot
tetrapod
Tetris
textiles
Thackaray's globules
Thagard, Norman E. (1943–)
thalamus
Thalassa
thalassemia
Thales of Miletus (c.624–545 BC)
thalidomide
thallium
Tharsis Montes
Thebe
Themis
THEMIS (Time History of Events and Macroscale Interaction during Substorms)
Themis family
Themisto
theodolite
Theophrastus (c.370–c.285 BC)
theory of evolution
theory of relativity
thermal analysis
thermal conduction
thermal conductivity
thermal conductor
thermal insulation
thermal insulator
thermal neutron
thermal probe
thermal proteins
thermal radiation
thermionic
thermistor
thermite
thermochemistry
thermocouple
thermodynamics
thermograph
thermometer
thermonuclear reaction
thermophiles
thermoregulation
thermosphere
thermostat
Theseus and the Minotaur
thiamine
Thiel, Walter (1910–1943)
Thiery figure
thigmotropism
The Thing
thioether
thiosulfate
third law of thermodynamics
thirst and hunger
thirteen
Thirty Colored Cubs puzzle
Thirty-six Officers problem
This Island Earth
tholin
Thollon, Louis (1829–1887)
Thompson, D'Arcy Wentworth (1860–1948)
Thomson, George Paget (1892–1975)
Thomson, Joseph John (1856–1940)
Thomson, William (Lord Kelvin) (1824–1907)
Thomson effect
Thomson scattering
Thor
THOR (Tracing Habitability, Organics, and Resources)
thoracentesis
thoracic duct
thoracic vertebra
thorax
thorium
thorns, prickles, and spines
Thor's Helmet Nebula (NGC 2359)
thousand
Thousand Astronomical Unit probe (TAU)
threadworm
three
Three Men's Morris
three-axis stabilization
three-body problem
thrombin
thrombocyte
thrombocythemia and thrombocytosis
thrombocytopenia
thrombolytic drugs
thrombophilia
thrombophlebitis
thrombosis
thrombotic thrombocytopenic purpura
thrombus
thrush
thrust
thrust chamber
thrust equalizer
thrust vector control
Thuban (Alpha Draconis)
Thue-Morse constant
Thule (minor planet 279)
thulium
thunder
thunderstorm
thymine
thymosin
thymus gland
thyrocervical trunk
thyroglobulin
thyrohyoid membrane and ligaments
thyroid cancer
thyroid cancer treatment
thyroid cartilage
thyroid gland
thyroid hormone
thyroid-stimulating hormone (thyrotropin)
thyrotropin-releasing hormone (TRH)
thyroxine
tibia
tick
tic-tac-toe
TID
tidal dwarf galaxy
tidal force
tidal heating
tidal lock
tidal tail
tide
tie knots
Tikhonravov, Mikhail K. (1901–1974)
Tikov, Gavriil Adrianovich (1875–1960)
tiling
Tiling, Reinhold (1890–1933)
till
Timation
time
time dilation
time dislocation
time machine
time measurement
time portal
time reversal
time travel
TIMED (Thermosphere Ionosphere Mesosphere Energetic Dynamics satellite
time-division multiplexing
tin
Ting, Samuel C. C. (1936–)
Tinner's Rabbits
tinnitus (ringing in the ear)
TiO bands
Tipler's Argument
Tippee Top
TiPS (Tether Physics and Survivability satellite)
Tipu Sultan (c.1750–1799)
TIROS (Television Infrared Observation System)
tissue
Titan
Titan, life on
Titan, prebiotic evolution
Titan, seas and lakes
Titan (rocket)
Titania
titanium
Titchener illusion
Titius-Bode Law
Tito, Dennis (1941–)
Titov, Gherman Stepanovich (1935–2000)
Titov, Vladimir Georgievich (1947–)
titration
TLP (transient lunar phenomena)
T-lymphocyte
TMR-1C
Toby Jug Nebula (IC 2220)
Todd, David P. (1855–1939)
Toftoy, Holger N. (1903–1967)
tokamak
Tollens reagent
toluene
tomato
Tombaugh, Clyde William (1906–1997)
TOMS (Total Ozone Mapping Spectrometer)
ton
tongue
tonsillitis
tonsils
topaz
TOPEX-Poseidon
topocentric coordinates
topological group
topological space
TOPOLOGY
topology
tornado
toric contact lenses
Torino scale
torque
Toro (minor planet 1685)
Torricelli, Evangelista (1608–1647)
torsion
torus
TOS (TIROS Operational System)
total artificial heart
total eclipse
total impulse
total internal reflection
totality
touch
touchdown
Tough, Allen
tour
tourmaline
Tournesol
Toutatis (minor planet 4179)
Tower of Brahma
Tower of Hanoi
Townes, Charles Hard (1915–)
toxin
TPF
T-puzzle
TRACE (Transition Region and Coronal Explorer)
trace (mathematics)
trace element
trachea (wind-pipe)
tracheae (in insects)
tracheid
tracheostomy
trachoma
tracking
tractor beam
tractrix
trade winds
trailing hemisphere
trajectory
transcendental function
transcendental number
transcription
transducer
transduction
transfer ellipse
transfer function
transfer lens
transfer RNA
transfinite number
transformation
transformer
transgenic
TransHab
transient ischemic attack
transient lunar phenomena
transistor
transit
transit circle
Transit satellites
transition element
transition region
transition variable
translation
translational thrust
translatory motion
translocation
translunar
transmigration of souls
transmitter
trans-Neptunian object
transonic
transpiration
transplant
transporter (Star Trek)
transpose
transposition cipher
transposition of the great vessels
transponder
transuranic element
transversal
transverse acceleration
transverse cervical artery
transverse velocity
transverse wave
transversus
Trapezium (in Orion)
trapezium (shape)
trapezius
trapezoid
trapped propellant
traveling salesman problem
travertine
tree (graph)
tree (plant)
trefoil curve
Trematoda
tremor
Trendelenburg's test
Trevithick, Richard (1771–1833)
triage
Triana
triangle
Triangular Lodge
triangular number
Triangulum (constellation)
Triangulum Australe (constellation)
Triangulum Galaxy (M33, NGC 598)
Triassic period
triboluminescence
triceps
Triceratops
trichinosis
trichome
trichomoniasis
Trick Donkeys
tricuspid valve
trident of Newton
Trifid Nebula (M20, NGC 6514)
trigeminal nerve
trigger finger
triglyceride
trigonometric function
trigonometry
trihedron
triiodothyronine
trillion
trilobite
trinomial
triomino
triple point
triple-alpha process
triplet
tripoblastic
trisecting an angle
trisectrix
trisomy
tritium
Triton
TRMM (Tropical Rainfall Measuring Mission)
tRNA
trochlear nerve
trochoid
troctolite
troilite
Troitskii, Vsevolod Sergeevich (1913–1996)
Trojan (asteroid)
Troland, Leonard (1889–1932)
trophic level
trophoblast
tropic
Tropic of Cancer
Tropic of Capricorn
tropisms
tropopause
troposphere
troy weight
Truax, Robert C. (1917–2010)
True of Date (TOD)
true pole
Truly, Richard H. (1937–)
Trumpet
Trumpler, Robert Julius (1886–1956)
Trumpler classification
truncatable prime
truncate
truth
trypanosome
trypsin
tryptophan
Tsander, Fridrikh Arturovitch (1887–1933)
Tschirnaus's cubic
Tselina
Tsien, Hsue-Shen (1909–)
Tsikada
Tsiolkovsky, Konstantin Eduardovich (1857–1935)
TSS (Tethered Satellite System)
tsunami
Tsyklon
T-tube cholangiography
T-type asteroid
tuatara
tuber
tuberculosis
tubulin
Tucana (constellation)
47 Tucanae (NGC 104)
Tucker, George (1775–1861)
Tull, Jethro (1674–1741)
Tully-Fisher relation
tumor
tumor suppressor gene
tundra
tung oil
tungsten
Tunguska phenomenon
tunicate
tuning fork
tunnel diode
tunneling
Tupolev, Andrei (1888–1972)
Turbellaria
turbidites
turbofan engine
turbojet engine
turboprop engine
turbopump
turgor pressure
Turing, Alan Mathison (1912–1954)
Turing machine
Turing test
Turing machine
Turnbull, Margaret C.
Turner, Herbert Hall (1861–1930)
turnoff point
turpentine
turquoise
tusk shell
twenty
21-centimeter line
twelve
twelve-color map problem
twilight
twin primes
Twining, Lieutenant-General Nathan F. (1897–1982)
Twinkle, Project
TWINS (Two-wide Angle Imaging Neutral-atom Spectrometer)
Twins Paradox
twisted cubic
two
2001: A Space Odyssey
2003 EL61
2003 UB313 (Eris)
2004 DW (Kuiper Belt object)
2004 VD17
2004 XP14
2012 VP-113
2M1207
two-body problem
two-dimensional worlds
two-stage-to-orbit (TSTO)
TYC 8241 2652
Tycho Brahe (1546–1601)
Tycho Catalogue
Tycho crater (Moon)
Tycho's Star
tymbal organ
Tyndall, John (1820–1893)
type metal
typhoid
tyrosine
Tyuratam