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

F star
F-1 (rocket engine)
F-14 Tomcat
F-86 Sabre
Faber-Jackson relation
Fabre, Jean Henri (1823–1915)
Fabricius, David (1564–1617) and Johann (1587–1615)
Fabricius ab Aquapendente (1537–1619)
Fabry, Marie Paul Auguste Charles (1867–1945)
Fabry lens
Fabry-Pérot interferometer
face, anatomy
"face," on Mars
facial artery
facial muscles
facial nerve
facies
facilitated diffusion
factor
factor V
factor VIII
factorial
factorion
facula
Fadiman, Clifton (1904–1999)
Faget, Maxime A. (1921–2004)
Fagnano's problem
Fahrenheit (unit)
Fahrenheit, Gabriel Daniel (1686–1736)
fainting
fairy ring
Falcon 1
Falcon 9
fall line
Fallopian tube
Fallopius, Gabriel (1523–1562)
false alarms in SETI
family
Fanaroff-Riley classification
Fanconi anemia
farad
Faraday, Michael (1791–1867)
Faraday rotation
Faraday's laws
Farey sequence
fascia
FAST (Fast Auroral Snapshot Explorer)
fast radio burst
faster-than-light travel
fastest spacecraft
Fastrac engine
fat (triacylglycerol)
fatty acids
fault
Faye, Herve (1814–1902)
Faye's Comet
feather
Fechner, Gustav Theodor (1801–1887)
feedback
Fehling's solution
Feigenbaum's constant
feldspar
female genital tract
female reproductive system
female sexual response and hormone control
femoral artery
femoral nerve
femur
Feoktistov, Konstantin Petrovich (1926–2009)
Fermat, Pierre de (1601–1665)
Fermat number
Fermat's last theorem
Fermat's little theorem
fermentation
fermi (unit)
Fermi, Enrico (1901–1954)
Fermi acceleration
Fermi level
Fermi Paradox
Fermi-Dirac statistics
fermion
fermium
fern
ferrite
ferrocene
ferromagnetism
fertilization
fertilizer
Fessenden, Reginal Aubrey (1866–1932)
fetus
fever
Feynman, Richard Phillips (1918–1988)
Feynman diagram
FG Sagittae
fiber
fiberglass
Fibonacci (c. 1175–1250)
Fibonacci sequence
fibril
fibrillation
fibrin
fibroadenoma
fibroblast
fibroid
fibrosarcoma
fibrous joint
fibrous proteins
fibula
field
field curvature
field lens
field of view
field rotation
field-emission microscope
field-ion microscope
Fifteen Puzzle
figurate number
filament (on the Sun)
filariasis
filigree
films and plays involving mathematics
filter, electronic
filter, optical
filtration
final helium flash object
fine structure
fine structure constant
finger
Finger, Harold B. (1924–)
finite
finite-state automaton
fire extinguisher
fireball
firebrick
firedamp
fireworks
firing chamber
first contact
first law of thermodynamics
First Men in the Moon
firsts in spaceflight
firth
Fischer, Emil Hermann (1852–1919)
Fischer, Ernst Otto (1918–2007)
Fischer, Hans (1881–1945)
Fischer-Tropsch reaction
fish
fish, adaptations and forms
fish, unusual
fission, nuclear
fissure
fistula
Fitch, John (1743–1798)
Fitch, Val Logsdon (1923–2015)
Fitzgerald, George Francis (1851–1901)
five
Fizeau, Armand Hippolyte Louis (1819–1896)
fjord
FK Comae Berenices star
flagellate
flagellum
flame bucket
flame deflector
flame test
Flame Nebula (NGC 2024)
Flaming Star Nebula (IC 405)
Flammarion, Camille (1842–1925)
Flamsteed, John (1646–1719)
Flamsteed number
flare
flare star
flash photolysis
flash point
flash spectrum
flatworm
flavor
flax
flea
Fleming, Alexander (1881–1955)
Fleming, John (1849–1945)
Fleming, Williamina Paton Stevens (1857–1911)
Fleming's rules
Fletcher, James Chipman (1919–1991)
flexagon
Flexner, Simon (1863–1946)
flexor
flight
flight, history
flight path
Flight Research Center
flint
flint glass
flip-flop
Flora family (of asteroids)
Florey, Howard Walter (1898–1968)
flotation
flotation process
flower
flowering plants, reproduction
flowers of wayside and hedgerow
fluid
fluid dynamics
fluid flow
fluid mechanics
fluidization
fluorescein
fluorescence
fluorine
fluorite
fluorocarbon
fluoroscope
flux
flux collector
flux density
flux tube
fly-between-trains problem
Flying Bedstead (Rolls-Royce Thrust Measuring Rig)
flying saucers: a modern myth
flywheel
f-number
foam
Fobos
FOBS (Fractional Orbital Bombardment System)
focal length
focal plane
focal point
focal ratio
focal reducer
focus
focus, orbital
foehn
fog
Fokker-Planck equation
fold
foliation
folic acid
folium
follicle
follicle-stimulating hormone
following
Fomalhaut (Alpha Piscis Austrini)
fontanelle
Fontanelle, Bernard le Bovier de (1657–1757)
food poisoning
food storage in plants
foot (anatomy)
foot (unit)
foot-pound
footprint
foramen
foramen magnum
foraminifer
forbidden line
Forbidden Planet
force
forces of flight
Ford, Henry (1863–1947)
forebrain
forest
forests of Southeast Asia
forging
formaldehyde
formalism
formic acid
Fornax (constellation)
Fornax A
Fornax Cluster
Fornax Dwarf
forsterite
FORTE (Fast On-orbit Recording of Transient Events)
fortean falls
Fortune's conjecture
Forward, Robert L(ull) (1932–2002)
forward scattering
forward-contamination
fossil
fossils, martian
Foucault, Jean Bernard Léon (1819–1868)
Foucault knife-edge test
Foucault pendulum
founder effect
foundry
fountain experiment
four
four fours problem
four-color problem
Fourier, (Jean Baptiste) Joseph, Baron (1768–1830)
Fourier series
fourth dimension
fovea
Fowler, William ("Willy") Alfred (1911–1995)
Fox, Sidney W. (1912–1998)
Fp star
FPS system
fractals and pathological curves
fraction
fractionation
fractures and dislocations
fragile X syndrome
frame of reference
frame-dragging
FRANCE IN SPACE
francium
Franck, James (1882–1964)
Frankenstein
Frankland, Edward (1825–1899)
Franklin, Benjamin (1706–1790)
Frasch process
Fraser spiral
Fraunhofer, Joseph von (1787–1826)
Fraunhofer lines
freckle
Fred Lawrence Whipple Observatory
Fredholm, Erik Ivar (1866–1927)
free radical
free will
free-bound transition
free-free transition
Freemish crate
free-piston engine
freezing point
Frege, Friedrich Ludwig Gottlob (1848–1925)
French Space Agency
Frénicle de Bessy, Bernard (1602–1675)
frequency
frequency bands
frequency distribution
frequency modulation (FM)
Fresnel, Augustin Jean (1788–1827)
friction
Friedel-Crafts reaction
Friedman, Herbert (1916–2001)
Friedmann, Alexander Alexandrovich (1888–1925)
Frisch, Karl von (1886–1982)
Frogs and Toads puzzle
frogs in stones
Froissart, Jean (c. 1337–1410)
From the Earth to the Moon
front (weather)
frontal bone
frost
frostbite
frozen shoulder
fructose
fruit
frusemide
frustum
Frosch, Robert A. (1928–)
F-type asteroid
FU Orionis star
fuel
fuel rod
fugue
Fuji
fulcrum
Fuller, Richard Buckminster (1895–1984)
fullerene
fulminate
fumaric acid
fumarole
function
functional group
FUNCTIONS
fundamental catalogue
fundamental group
fundamental particle
fundamental theorem of algebra
fundamental theorem of arithmetic
fundamental unit
fungal disease
fungi
Funk, Casimir (1884–1967)
funny bone
fur
furfural
furlong
furnace
fuse
FUSE (Far Ultraviolet Spectroscopic Explorer)
fusel oil
fusion propulsion, microwave-induced
fusion, nuclear
fusion crust
Fuyo