| A resource of The Worlds of David Darling |
 |
Items in bold caps are categories
S Andromedae
S Doradus star
S star
S Vulpeculae star
S wave
Saccheri, Giovanni Girolamo (1667-1733)
sacculus
Sacramento Peak Observatory
sacroiliac joint
sacrum
saddle
Sadr (Gamma Cygni)
Sagan, Carl Edward (1934-1996)
Sagan Memorial Station
Sagan's Response
Sagdeyev, Roald Z. (1932-)
SAGE (Stratospheric Aerosol and Gas Experiment)
Sagitta (constellation)
sagittal crest
Sagittarius (constellation)
Sagittarius A (Sgr A)
Sagittarius Arm
Sagittarius B2 (Sgr B2)
Sagittarius Dwarf Elliptical Galaxy
Sagittarius Dwarf Irregular Galaxy
St. Ives problem
St. Petersburg Paradox
Saha equation
Saiph (Kappa Orionis)
Sakurai, Kunitomo (1933-)
Sakurai's Object
salicylic acid
salient
salinon
salivary glands
salmonella
Salpeter function
salt
Salyut
samarium
Samos
SAMPEX (Solar Anomalous and Magnetospheric Particle Explorer)
sample return mission
San Francisco State University Planet Search
San Marco (launch site)
San Marco (satellites)
sand
Sander, Friedrich Wilhelm (d. 1938)
sandstone
Sänger, Eugen (1905-1964)
Sarabhai, Vikram Ambalal (1919-1971)
sarcoidosis
sarcoma
Sargas (Theta Scorpii)
Saros
SARSAT (Search and Rescue Satellites)
Satcom
satellite
satellite constellation
satellite galaxy
satellite mass categories
SATELLITES AND SPACE PROBES
Saturn
Saturn, moons
Saturn, rings
Saturn launch vehicles
Saturn Nebula (NGC 7009)
saucer flap of 1947
Savitskaya, Svetlana (1948-)
SBIRS (Space-Based Infrared System)
SB-WASS (Wide Area Surveillance Satellite)
scalar
Scaled Composites
scalene triangle
scales
scan platform
scarlet fever
SCATHA (Spacecraft Charging At High Altitudes)
scatter ellipse
Scattered Disk
scattering
Scheiner, Christoph (1575-1650)
Scheiner, Julius (1858-1913)
Schiaparelli, Giovanni Virginio (1835-1910)
Schiff, Steven (1947-1998)
Schindleria brevipinguis (stout infantfish)
Schirra, Walter Marty, Jr. (1935-2007)
schist
schistosomiasis
Schläfli, Ludwig (1814-1895)
Schläfli symbol
Schmidlap, Johann (16th century)
Schmidt, (Johann Friedrich) Julius (1825-1884)
Schmidt, Maarten (1929-)
Schmidt camera
Schmidt-Cassegrain telescope
Schmiedl, Friedrich (1902-1994)
Schmitt, Harrison Hagan (1935-)
Schneider, William C.
Schönberg-Chandrasekhar limit
schoolgirls problem
Schopf, J. William
Schriever, Bernard A. (1910-)
Schröder's reversible staircase
Schrödinger, Erwin (1887-1961)
Schrödinger equation
Schroter, Johann Hieronymous (1745-1816)
Schwabe, (Samuel) Heinrich (1789-1875)
Schwann, Theodor (1810-1892)
Schwarzschild, Karl (1873-1916)
Schwarzschild, Martin (1912-1997)
Schwarzschild black hole
Schwarzschild radius
Schwassmann-Wachmann 1, Comet 29P/
Schweikart, Russell L. (1935-)
sciatic nerve
sciatica
Science Advisory Panel on Unidentified Flying Objects
SCIENCE CENTERS AND ATTRACTIONS
SCIENCE FICTION
science fiction involving extraterrestrials, up to 1900
science fiction involving extraterrestrials, 1900-1940
science fiction involving extraterrestrials, after 1940
science fiction involving extraterrestrials, in film and television
science fiction involving extraterrestrials, on radio
SCIENCE OF STAR TREK
SCIENTIFIC MYSTERIES
scientific practical jokes
SCIENTIFIC SOCIETIES
scintillation
S-class asteroid
sclera
sclerosis
score (number)
SCORE (satellite)
scoria
18 Scorpii
Scorpius (constellation)
Scorpius X-1 (3U 1617-15)
Scorpius-Centaurus Association
Scott, David R. (1932-)
Scout (rocket)
Scout Program (Mars)
scramjet
screaming
screw
scrub
Scully, Frank
Sculptor (constellation)
Sculptor Dwarf
Sculptor Group
scurvy
Scutum (constellation)
Scylla and Charybdis
SDIO (Strategic Defense Initiative Organization)
SDS (Satellite Data System)
sea anemone
sea cucumber
sea fan
Sea Launch
sea pen
sea urchin
Seamans, Robert C., Jr. (1918-)
Search for Extraterrestrial Artifacts
Search for Extraterrestrial Intelligence
Search for Extraterrestrial Visitation
Search for Life in the Universe, The
search space
Seasat
seasons
Seastar/SeaWiFS
Seawinds
sebaceous gland
secant
Secchi, Rev. Pietro Angelo (1818-1878)
second
second law of thermodynamics
secondary atmosphere
secondary crater
secondary growth
secondary minimum
secondary mirror
SECOR (Sequential Collation of Range)
secretin
sector
secular
secular acceleration
secular parallax
sediment exploration station
sedimentary
Sedna
SEDS (Small Expendable-tether Deployer System)
Seebeck effect
seed
Seeger, Charles L. (1912-)
seeing
segment
segmented mirror
seismic wave
SELENE (Selenological and Engineering Explorer)
selenite
seleno-
self-enumerating sentence
self-intersecting
self-organization
self-organized criticality
self-referential sentence
self-repairing spacecraft
self-replicating probe
self-similarity
semicircular canals
semiconductor
semigroup
semi-magic square
semi-major axis
semi-regular polyhedron
semi-regular variable
semi-synchronous orbit
sensitivity
sensor
sensory receptor
sentinel hypothesis
Sentinel, Project
sepal
separation
separation rocket
septicemia
septum
sequence
sequence tagged site
SERENDIP
SERENDIP I
SERENDIP II
SERENDIP III
SERENDIP IV
Sergeant (missile)
series
series circuit
serotonin
serous gland
serous membrane
Serpens (constellation)
Serpens Dwarf
serpentine (curve)
serpentine (mineral)
SERT (Space Electric Rocket Test)
serum
service tower
Serviss, Garrett (Putnam) (1851-1929)
servomechanism
sessile
set
set theory
SETA (Search for Extraterrestrial Artifacts)
Setebos
SETI
SETI (Search for Extraterrestrial Intelligence)
SETI, false alarms
SETI, religious dimensions
SETI, unexplained signals
SETI Australia Centre
SETI Institute
SETI League
SETI@home
SETIQuest magazine
setting circles
SETV (Search for Extraterrestrial Visitation)
seven
seventeen
severe combined immunodeficiency (SCID)
sex chromosome
sexagesimal
sex-linked
Sextans (constellation)
Sextans Dwarf
Seyfert galaxy
Seyfert's Sextet (Hickson 79)
Sfera
SFU (Space Flyer Unit)
shadow transit
Shah-Nama
shale
Shannon, Claude Elwood (1916-2001)
Shapiro, Robert (1935-)
Shapley, Harlow (1885-1972)
Shapley 1 (planetary nebula)
Shapley Concentration
Shapley-Ames Catalogue
SHARP (Super High Altitude Research Project)
shatter cone
Shaula (Lambda Scorpii)
Shaver, Richard S(harpe) (1907-1975)
Shavit
Shedar (Alpha Cassiopeiae)
shell (electron)
shell burning
shell galaxy
shell star
Shenzhou
Shepard, Alan Bartlett, Jr. (1923-1998)
shepherd moon
shergottite
Shesta, John
shield volcano
shingles
Shinsei
Shkadov thruster
Shklovskii, Iosef Samuilovich (1916-1985)
shock
shock front
shock wave
Shoemaker, Eugene Merle (1928-1997) and Caroline Shoemaker (1929-)
Shoemaker-Levy 9, Comet (D/1993 F2)
short-period comet
Shostak, Seth
shotgun sequencing
shoulder
Shtil
shuffle
shunting puzzles
SI (Système Internationale) system of units
sickle cell disease
sidereal time
siderophile element
Siding Spring Observatory
Siegel's paradox
siemens (S)
Sierpinski, Waclaw Franciszek (1882-1969)
Sierpinski carpet
Sierpinski gasket
Sierpinski number
sieve of Eratosthenes
sievert (Sv)
sieve-tube
SIGINT (signals intelligence) satellites
Sigma 2398
Sigma Draconis
Sigma Orionis star cluster
Sign, Project
signal verification
signal-to-noise ratio (SNR)
significant digits
Sikhote-Alin meteorite
silane
silica
silicates
silicon
silicon star
silicon-based life
silicone
sill
Silurian period
silver
Silver Coin Galaxy
Silverpit Crater
Silverstein, Abe (1908-2001)
SIM PlanetQuest
similar
simple group
simple harmonic motion
simple machine
simply-connected
Simpson, George Gaylord (1902-1984)
Singer, Samuel Frederick (1924-)
single nucleotide polymorphisms (SNPs)
single-stage-to-orbit (SSTO)
singularity
Sinope
Sinton, William M. (1925-2004)
siphon
Sirius (Alpha Canis Majoris)
Sirius, mystery of red color
SIRTF
six
six circles theorem
skeletal division
skeletal muscle
skeletal muscle groups
skeletal system
skeleton
skepticism
skew lines
Skewes' Number
skin
skin cancer
skin cancer treatment
skull
Skull Nebula (NGC 246)
Skunk Works
sky hook
Skyhook, Project
Skylab
Skylark
Skylon
Skynet
Skyrocket (Douglas)
slate
Slayton, Donald Kent ("Deke") (1924-1993)
sleep apnea
sleeping sickness
slew
slide rule
slime mold
sling-shot effect
Slipher, Earl C. (1883-1964)
Slipher, Vesto Melvin (1875-1969)
slipped disk
Sloan Digital Sky Survey (SDSS)
slope
sloshing
slot
Slothouber-Graatsma puzzle
small intestine
Small Magellanic Cloud (SMC)
smallpox
SMART-1
SMC X-1 (2U 0115-73)
SME (Solar Mesosphere Explorer)
SMEX (Small Explorer)
SMEX lite
Smith number
Smithsonian Astrophysical Observatory
Smithsonian Astrophysical Observatory Catalog (SAO Catalog)
SMM (Solar Maximum Mission)
smooth (mathematics)
smooth muscle
SMS (Synchronous Meteorological Satellite)
Smullyan, Raymond (1919-)
Smyth, Charles Piazzi (1819-1900)
Snake Nebula (Barnard 72)
SNAP (Systems for Nuclear Auxiliary Power)
SNAPSHOT
Snark
SNC meteorites
SNOE (Student Nitric Oxide Explorer)
snow
snowball Earth
snowball prime
Socorro Incident
Socrates (c. 469–399 BC)
Soddy, Frederick (1877-1956)
Soddy circle
Soddy's formula
sodium
sodium chloride
sodium-potassium pump
SOFIA (Stratospheric Observatory for Infrared Astronomy)
soft gamma repeater
soft landing
SOHO (Solar and Heliospheric Observatory)
Sojourner
sol
Sol
Solar- (Japanese satellites)
solar apex
solar array
solar cell
solar conjunction
Solar Connections Initiative
solar constant
solar eclipse
solar flare
solar longitude
solar mass
solar maximum
solar nebula
solar neutrino problem
solar oxygenating pump
solar parallax
solar plexus
solar radio emission
solar rotation number
solar sail
solar system
solar system, formation
solar telescope
solar time
solar topics
solar tower
solar wind
Solar-B
solar-electric propulsion
solarion
Solaris
solenoid
solid
solid propellant
solid solution
SOLID STATE PHYSICS
solid-propellant rocket motor
solidus
solipsism
soliton
Solrad (Solar Radiation program)
solstice
solubility
solute
solution (chemistry)
solution (math)
Solvay process
solvent
Solwind
Soma Cube
somatic cell
somatostatin
Sombrero Galaxy (M104, NGC 4594)
Somnium
sonic boom
sonic speed
Sophie Germain prime
SORCE (Solar Radiation and Climate Experiment)
Sothic cycle
sound
sound barrier
sounding rocket
source
South African Astronomical Observatory (SAAO)
South African Large Telescope (SALT)
southern blot
Southern Crab Nebula (He2-104)
Southern Pleiades (IC 2602)
Southern Reference Stars (SRS)
Southern SERENDIP
Southern Sky Survey
Soyuz
Soyuz launch vehicle
SP-100
space
Space 1999
Space Adventures
SPACE AGENCIES
SPACE AND AEROSPACE MEDICINE
SPACE AND TIME
space ark
space biology
space cannon
space colony
space drive
Space Electric Rocket Test
space elevator
space equivalence
Space Foundation
Space Frontier Foundation
Space Infrared Telescope Facility (SIRTF)
Space Interferometry Mission (SIM)
Space Launch Initiative (SLI)
space medicine
space missions, linked to UFO reports
space motion sickness (SMS)
space probe
Space Race
space sail
Space Science Board
Space Shuttle
space simulator
space station
Space Station V (from 2001: A Space Odyssey)
Space Studies Board
Space Studies Institute
space survival
Space Technology 5
space tether
space tourism
Space Transportation System (STS)
Space Travel Argument
space velocity
Spacecause
SPACECRAFT
spacecraft, fastest
SPACECRAFT COMMUNICATION AND TRACKING
SPACECRAFT NAVIGATION AND CONTROL
SPACECRAFT TYPES
SpaceDev, Inc
space-filling curve
Spaceguard Foundation
Spacehab
Spacelab
Spacepac
spaceplane
spaceport
Spaceport America
SpaceShipOne
spacesuit
spacetime
spacewalk
Spacewatch Project
Space X (Space Exploration Technologies Corporation)
Spadeadam Rocket Establishment
Spallanzani, Lazzaro (1729-1799)
spallation
SPARCLE (Space Readiness Coherent Lidar Experiment)
spark chamber
Spartan 201
SPAS (Shuttle Pallet Satellite)
spatter
spatter and cinder cone
spatter rampart
Special Astrophysical Observatory
special function
special theory of relativity
species
specific heat
specific impulse
SPECTRA AND SPECTROSCOPY
spectral lines
spectral series
spectral type
spectrograph
spectrometer
spectrophotometer
spectrophotometry
spectroscope
spectroscopic
spectroscopic binary
spectroscopic companion
spectroscopy
spectrum
Spectrum-X-Gamma
speculum
speed
speed of light
speed of sound
Spencer, Herbert (1820-1903)
Spencer Jones, Harold (1890-1962)
Sperner's lemma
sphenoid bone
sphere
sphere packing
spherical aberration
spherical astronomy
spherical coordinates
sphericon
sperm
spheroid
spherosome
sphincter
Sphinx riddle
Spica (Alpha Virginis)
spicule
spider-and-fly problem
Spielberg, Steven (1947-)
spin
spin quantum number
spin stabilization
spin temperature
spina bifida
spinal column
spinal cord
spinal cord injury
spinal nerve
spindle
Spindle Galaxy (NGC 3115 and NGC 5866)
spin-down
spinor
Spinoza, Baruch (1632–1677)
spiral
spiral arm
spiral galaxy
spirillum
Spitzer, Lyman (1914-1997)
Spitzer Space Telescope
Spitzer-Schwarzschild scattering mechanism
spleen
sponge
spongy parenchyma
spontaneous generation
spontaneous human combustion
sporadic meteor
spore
Spörer, Gustav Friedrich Wilhem (1822-1895)
Spörer minimum
Spörer's law
sporophyte
SPOT (Satellite Probatoire d'Observation de la Terre)
Sprague-Grundy theory
sprite
s-process
Sproul Observatory
Sprouts
Sputnik
Sputnik launch vehicle
spy satellite
square
square free
Square Kilometer Array (SKA)
square number
Square of Pegasus
square root of 2
squaring the circle
squaring the square
squark
Sriharikota High-Altitude Range Centre (SHAR)
SRTM (Shuttle Radar Topography Mission)
SS (Scientific Satellite)
SS 433
SS Cygni star
SSF (subsatellite ferrets)
SSS (Small Scientific Satellite)
stabilization of satellites
stable equilibrium
Stack, John (1906-1972)
Stacksat
Stafford, Thomas P. (1930-)
stage
staged-in-orbit
staging
Stahl, Georg Ernest (1660-1734)
stalactites and stalagmites
stamen
standard candle
standard deviation
standard model
standard star
Stanhope, Earl of
Stapledon, (William) Olaf (1886-1950)
stapp (unit)
Stapp, John Paul (1910-1999)
STAR (Self-Testing and Repairing computer)
star
star cluster
star diagonal
star drive
Star Maker
star of Lakshmi
star streaming
Star Trek
Star Trek original series episodes
Star Wars
starburst galaxy
starch
Starchaser Industries
Stardust
Starfish
Stargazer, Project
Stark effect
starquake
STARS, BRIGHTEST
stars, classification
stars, evolution
stars, lifetimes
STARS, NOTABLE
stars, masses
STARS, NEAREST
stars, numbers
stars, populations
stars, sizes
stars, temperatures
STARS, TYPES
STARSHINE (Student Tracked Atmospheric Research Satellite for Heuristic International Networking Equipment)
starship
START (Spacecraft Technology and Advanced Reentry Test)
Start-1 Russian launch vehicle
state of matter
STATES OF MATTER
static firing
static testing
statics
stationary orbit
stationary point
station-keeping
statistical mechanics
statistical parallax
statistics
stay time
steady-state theory
steam engine
STEDI (Student Explorer Demonstration Initiative)
steel
Steiner, Jakob (1796-1863)
Steiner-Lehmus theorem
Steinhaus, Hugo Dyonizy (1887-1972)
stele
Stella
stellar association
STELLAR ASTROPHYSICS
stellar atmosphere
stellar engine
stellar evolution
stellar husbandry
stellar wind
stellation
stem
stem cell
Stennis Space Center (SSC)
stent
STENTOR (Satellite de Télécommunications pour Expériences de Nouvelles Technologies en Orbite)
step principle
step rocket
Stephan's Quintet
Stephano
steradian
STEREO (Solar TErrestrial RElations Observatory)
stereoisomerism
stereoisomers
Sternberg State Astronomical Institute
sternum
steroid
sterol
stethoscope
Steward Observatory
Stewart, Homer J. (1915-2007)
Stewart Committee
STEX (Space Technology Experiments)
stigma
stipule
stishovite
stochastic
stochastic process
stoma
stomach
Stoney, G. Johnstone (1826-1911)
stony meteorite
stony-iron meteorite
straight
strain
Strand, Kay Aage Gunnar
strange loop
strange particle
strangeness
strap-on booster
strategy
stratigraphic column
stratigraphy
stratosphere
stratovolcano
stratum
streamlining
Strela
stress
stress testing
stressed limits
strewn field
Stride, Scot L.
Strieber, Whitley (1945-)
string
string puzzle
string theory
strobogrammatic prime
stroke
stromatolite
Strombolian eruption
Strömgren, Bengt Georg Daniel (1908-1987)
Strömgren sphere
strong force
strontium
strophoid
Strughold, Hubertus (1898-1987)
Struve, Friedrich Georg Wilhelm von (1793-1864)
Struve, Otto (1897-1963)
Struve, Otto Wilhelm (1819-1905)
Struve 2398
Struve's Lost Nebula (NGC 1554)
STRV (Space Technology Research Vehicle)
stub fins
Stuhlinger, Ernst (1913-)
Sturrock, Peter A.
style
styrene
SU Ursae Majoris (SU UMa)
SU Ursae Majoris star
Subaru Telescope
subcarrier
subclavian artery
subcutaneous tissue
subduction
subdwarf
subgiant
subgroup
sublime
sublime number
sublingual gland
subluminal
subluminous star
submandibular gland
Submillimeter Array
submillimeter band
Submillimeter Telescope Observatory (SMTO)
submillimeter wave astronomy
suborbital
subsatellite
subshell
subsolar point
subsonic
subspace
substitution cipher
substitution reaction
substorm
substrate
succinic acid
sucrase
sucrose
Sudbury Crater
Sudbury Neutrino Observatory (SNO)
sudden cardiac arrest
sugars
suicide gene
Suisei
"Suitcase SETI"
sulfate
sulfides
sulfonic acid
sulfur
sulfur dioxide
sulfuric acid
Sullivan, Kathryn D. (1951-)
Sultan's Dowry
Summer Triangle
Sun
SUN AND RELATED TOPICS
Sun, as a gravitational lens for focusing interstellar signals
Sun, life on
sundial
Sunflower Galaxy (M63, NGC 5055)
sun-grazing comet
Sun-like stars
sunspot
sunspot cycle
sun-synchronous orbit
Sunyaev-Zel'dovich effect
superbubble
supercivilizations
supercluster
supercomputer
superconductivity
superegg
superellipse
surface wave
superfactorial
supergalactic plane
supergiant
supergranulation cell
supergravity
super-hump
superior planet
superior vena cava
Super-Kamiokande
superluminal
superluminal radio source
supermassive black hole
supernova
supernova 1885
supernova 1987A
supernova remnant
superorganism
super-outburst
superoxide
superparticle
superpartners
superphylum
super-rotation
supersonic
superstring theory
supersymmetric standard model
supersymmetry
supine g
supplementary angles
SUPRAMOLECULAR CHEMISTRY
surface
surface anatomy
surface brightness
surface gravity
surface of revolution
surface tension
SURFSAT (Summer Undergraduate Research Fellowship Satellite)
surge
surgery through the ages
surreal number
surveillance satellite
Surveyor
Surveyor 3
survival, in space
suspended animation
suspensory ligaments
sustainer engine
suture
Svobodny Cosmodrome
Swan bands
SWAS (Submillimeter Wave Astronomy Satellite)
swastika
sweat cooling
sweat gland
Swedenborg, Emanuel
Swift, Jonathan and the moons of Mars
Swift Gamma-Ray Burst Explorer
Swift-Tuttle, Comet 109P/
Swigert, John Leonard (Jack), Jr. (1931-1982)
swing-wing aircraft
SX Arietis star
SX Phoenicis star
Sycorax
syllogism
Sylvester, James Joseph (1814-1897)
Sylvester's problem of collinear points
symbiosis
symbiotic star
symmedian
symmetric group
symmetry
symmetry group
synapse
synchronous rotation
synchrotron
synchrotron radiation
Syncom
syndrome
synergic curve
synodic
synodic period
synovial fluid
synthetic aperture radar (SAR)
Syromiatnikov, Vladimir S. (1934-)
Syrtis Major
system
SYSTEMS THEORY
syzygy
Szilassi polyhedron
Also on this site:
Encyclopedia of Alternative Energy & Sustainable Living
Transport Concepts & Designs (partner site)