Math
- cosh(x) is the average of e^x and e^−x
- Group homomorphism
- Tetractys
- Hyperbolic function
- Hyperbola
- Quaternion
- Tensor
- Euler spiral
- Aeonium tabuliforme rosette, Golden ratio Phyllotaxis
- Fibonacci spiral approximates the Golden spiral (See Liber Abaci).
- Golden spiral
- Desargues' theorem
- Radian
- birectified 5-simplex, a convex Uniform 5-polytope.
- Tesseract, one of the 6 Convex regular polychorons (4-Polytope)
- graph of Tesseract, one of the 6 convex regular 4-polytopes (Polychoron).
- graph of the 120-cell hecatonicosachoron, one of the 6 convex regular 4-polytopes (Polychorons).
- Root system is a configuration of vectors in a Euclidean space satisfying certain geometrical properties. The concept is fundamental in the theory of Lie groups and Lie algebras. (See Differentiable manifold, Adjoint endomorphism, Abstract algebra, and Galois theory).
- Lie algebra
- Spirograph for drawing Hypotrochoids and Epitrochoids.
- Harmonograph employs pendulums to create a geometric images such as Lissajous curves which describe Complex harmonic motion. (See Fourier series).
- Lorenz system (Lorenz attractor)
- Mandelbrot set
- Mandelbrot set detail
- "Seahorse tail", central endpoint is a Misiurewicz point.
- Mandelbrot set detail
- Tetrahedron
- Hexahedron
- Octahedron
- Dodecahedron
- Icosahedron
Materials
- Periodic table of the Chemical elements
- Methane, the simplest possible Organic compound.
- Estimated mass flows of fluorine
- Chloralkali process
- Vanadium
- Zirconium
- A billet of highly enriched uranium, author unknown (US Government)
- Bismuth
- Hafnium
- Lead
- Thulium
- Lutetium
- Manganese
- Cadmium
- Chlorine
- Rhodium
- Zinc
- Nickel
- Cobalt
- Rhenium
- Ruthenium
- Scandium
- Hydrogen
- Krypton
- Neon
- Nitrogen
- Xenon
- Argon
- Helium
- Yttrium
- Tungsten
- Tantalum
- Paper autofluorescence
- Niobium
- Molybdenum
- Iron
- Chromium
- Etched vanadium disc
- Osmium
- Synthetic gold crystals at Gold
- Synthetic silver crystal
- Bromine liquid and gas (in an acryllic cube)
- Titanium
- Bismuth
- Continuous casted copper slice
- Biodegradable plastic utensils at Photoelasticity
- Ferrofluid Large Spikes at Ferrofluid
- Eight Allotropes of Carbon
- Aerogel
Physics
- Lagrangian point
- L5 Society
- Cyclotron, Lorentz force
- Gravitation, Spacetime
- Field (physics)
- Magnetic dipole, Magnetic field
- Introduction to mathematics of general relativity
- Gravitational redshift, Introduction to general relativity
- Force field (physics), Gravity well
- Wormhole
- Legendre polynomials,Gaussian quadrature
- Maxwell's equations
- Magnetosphere
- Black hole thermodynamics
- Kepler's laws of planetary motion
- Kepler's laws of planetary motion
- Dye laser, Tunable laser
- Rhodamine 6G
- Diffraction grating
- Gamma-ray astronomy, Fermi Gamma-ray Space Telescope
- Hypervelocity
- Activation energy, Incandescence
- Atmospheric electricity Plasma
- Plasma (physics)
- Plasma globe
- Quark–gluon plasma
- Plasma globe demonstrates Anisotropy
- Maxwell's equations
- Birkeland current
- Entropy
Astro
- Milky Way
- Apollo 17, Earth, 20th century
- Solar flare, Solar transition region, Sun
- Solar flare
- Sun
- Corona
- Coronal loop
- Kepler's Supernova
- Type Ia supernova SN 1994D, near Lenticular galaxy NGC 4526
- Galactic Center, Milky Way
- Andromeda Galaxy, nearest Spiral galaxy (Canis Major Dwarf Galaxy is nearest to our Solar System)
- Black hole, Stellar black hole
- Summer Triangle, Asterism (astronomy)
- Deneb, the Alpha star in the constellation Cygnus. Deneb in fiction
- Cygnus X-1, Astrophysical X-ray source, Cygnus X-1 was the first X-ray source widely accepted to be a black hole candidate.
- Dwarf galaxy
- Whirlpool Galaxy, a Spiral galaxy of the M51 Group in Constellation Canes Venatici, NGC 5195
- Inferior conjunction of Venus and Earth. Successive inferior conjunctions of Venus repeat very near a 13:8 orbital resonance.
- Opposition, Conjunction, and Syzygy in Spherical astronomy.
See also Astronomical transit, Occultation, and Axial precession (an Euler rotation).
- Celestial sphere
See Celestial coordinate system, Right ascension and Declination (like Azimuth and Altitude in the Horizontal coordinate system).
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