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U.S. space station Skylab (occupied 1973-74), shown with docked Apollo Command and Service modules.

Space station Mir, after its completion in 1996, with the launch dates of each modular component shown.

The Apollo program: the Saturn V launch vehicle and configurations of the spacecraft modules at launch and during the journey.

Apollo mission profile for a lunar landing and return, outlining the various stages along the mission.

Basic characteristics of orbits in which a satellite can be placed around Earth, categorized by inclination, shape and altitude.

The journey of the Galileo spacecraft to Jupiter, highlighting major observations along the trajectory, as well as their dates.

U.S. space shuttle, composed of a winged orbiter, an external liquid-propellant tank, and two solid-fuel rocket boosters.

Aurora Australis

Muscle structure, artwork

Blower-scavenged, two-stroke-cycle engine with uniflow scavenging, displaying both upstroke and downstroke.

Four types of gasoline engines: opposed-piston engine, rotary engine, in-line engine, and V-type engine.

Cross section of a V-type engine.

Diesel engine equipped with a precombustion chamber.

Georges Leclanche's dry cell and its later variations, zinc chloride and alkaline cells, are batteries commonly used worldwide.

Modern version of the Leclanche cell. This heavy-duty zinc-carbon primary battery is a dry cell with an immobilized electrolyte.

In Ptolemy's geocentric model of the universe, the Sun, Moon, and each planet orbit a stationary Earth.

Seismic ray types in Earth's interior from earthquake at F.

Theoretical depiction of the movement of tectonic plates across Earth's surface.

Height of space from Earth, illustration

Electrical conduction in the heart in healthy individuals is controlled by pacemaker cells in the sinoatrial node.

Internal structure of Mercury, illustration

Internal structure of Mercury, illustration

Internal structure of Earth, illustration

The process of cell division by mitosis.

Average exchange of energy between the surface, atmosphere, and space, as percentages of incident solar radiation.

General patterns of atmospheric circulation over an idealized Earth with a uniform surface and the actual Earth.

The Michelson interferometer measures the effect on the speed of light of the motion of the ether through which light travels.

Basic components of an electrochemical cell.

Automotive-type lead-acid battery, a storage battery that holds its charge for a long time and can be recharged.

Three types of natural selection, showing the effects of each on the distribution of phenotypes within a population.

Evolutionary history of the globin genes. The dots indicate the duplication of ancestral genes, giving rise to new gene lineage.

The steps involved in the engineering of a recombinant DNA molecule.

The components of a scanning electron microscope (SEM).

The components of a transmission electron microscope (TEM).

The diffusion of water across a semipermeable membrane.

The diffusion of potassium cations across a semipermeable membrane.

Changes in ion permeance underlying the action potential.

Diagram depicting the process of atoll formation. Atolls are formed from the remnant parts of sinking volcanic islands.

Differentiation of the external genitalia in the human embryo and fetus.

Diagram of a mammalian muscle spindle.

Fission bomb designs

Thermonuclear warhead

Saturn 5 rocket, illustration

Saturn 5 rocket, illustration

Saturn 5 rocket, exploded diagram

Saturn 5 rocket, exploded diagram

Electromagnetic spectrum. The visible range (shaded portion) is shown enlarged on the right.

The gasoline carburetor is a device that introduces fuel into the airstream as it flows into the engine.

The sequence of events in a four-stroke diesel engine involves a single intake valve, fuel-injection nozzle, and exhaust valve.

Cutaway view of a typical construction of a miniature power cell, as in a zinc-silver oxide or zinc-mercuric oxide system.

A fuel cell (actually a group of cells) has essentially the same kinds of components as a battery.

Phylogeny based on differences in the protein sequence of cytochrome c in organisms ranging from Neurospora mold to humans.

Height of space from Earth, illustration

Height of space from Earth, illustration

Height of space from Earth, illustration

Coriolis force

Theoretical diagram showing the effects of an advancing tectonic plate on other adjacent, but stationary, tectonic plates.

Mechanism of enzyme action, illustration

Animal cell structure

Laser Interferometer Space Antenna (LISA), a Beyond Einstein Great Observatory, is scheduled for launch in 2015

Seasons change because more direct sunlight falls on some parts of Earth than others at different times of the year.

Goose barnacle anatomy, artwork

The weather model of meteorologist Edward Lorenz.

Light waves matching the orientation of the molecules of a polarizing filter are absorbed, reducing the intensity of the light.

Uniformly accelerated motion; s = speed, a = acceleration, t = time, and v = velocity.

The artery wall and the ultrastructure of the smooth muscle cells within it.

Approaching the speed of light, an object appears shorter, with a longer time interval, relative to its intervals when at rest.

The 4-D space-time continuum is distorted in the vicinity of any mass, depending on the mass and the distance from the mass.

A cutaway view shows how light passes through the lenses and prisms of binoculars.

The four strokes of a four-stroke cycle engine - intake, compression, power, and exhaust. Only the intake stroke delivers power.

Nickel (hydroxide)-cadmium cell of “jelly roll” construction. This rechargable battery is commonly used in portable devices.

Cutaway view of an alkaline-manganese dioxide power cell.

An internal-combustion engine goes through four strokes: intake, compression, combustion (power), and exhaust.

Typical gasoline engine cooling system.

Typical gasoline engine lubrication system.

Rising air in an unstable atmosphere

Bohr atomic model

Electron shell

Schematic drawing of the structure of a typical bacterial cell of the bacillus type.

Annual circulation patterns in a dimictic lake: stratification in the summer and complete overturn in the autumn and spring.

Four main types of estuaries: A) salt wedge estuary, B) partially mixed estuary, C) vertically homogeneous estuary, D) fjord.

Vegetation profile of a temperate deciduous forest.

Vegetation profile of a desert.

Vegetation profile of tropical mountain lands.

Cross section of a typical bomb calorimeter.

Stages in the process of meiosis, cell division among sexually reproducing organisms.

Receptor-mediated endocytosis enables cells to ingest molecules such as protein that are necessary for normal cell functioning.

The endoplasmic reticulum plays an important role in the biosynthesis, processing, and transport of proteins and lipids.

Transverse section of an artery.

Human arterial supply and venous drainage of the organs.

The stages in the evolution of a wave (frontal) cyclone.

Diagram of a wave system depicting typical divergence and convergence distributions for non-tilting and tilting systems.

Horizontal divergence and convergence patterns associated with the polar-front jet.

The onset and retreat of the West African monsoon with respect to the timing of the direct rays of the sun.

Diagram of a two-cavity klystron, used as an amplifier and RF signal source at microwave frequencies, and also as an oscillator.

Elements of a magnetron, used to generate power for radar systems, microwave ovens, plasma screens, and linear accelerators.

Elements of the traveling-wave tube (TWT), used to amplify microwave signals over broad bandwidths.

A tokamak is a toroidal magnetic confinement system used as a method of achieving fusion energy.

The Hardy-Weinberg Law applied to two alleles.

Two types of pressure gauge: the U-tube manometer and the Bourdon-tube gauge.

Diagram of a human uterus during the fourth month of pregnancy.

The analysis of sound frequencies by the basilar membrane.

Space mail

Viral transfer of bacterial DNA, artwork

Asteroid distribution

Displacements in the Earth in four types of free vibrations.

Wormhole through hyperspace, artwork

Earth's prebiotic and modern atmosphere

Pay-off matrix showing bourgeois, or mixed attack/retreat behaviour, as the most stable strategy for a population.

Diagram of an artificial pacemaker

Human muscle structure, artwork

Polar covalent bond

Vegetation profile of a boreal forest. The tree layer consists mainly of conifers, and mosses are the predominant ground cover.

Female reproductive system, artwork

Gender characteristics, artwork

Osteoarthritis of the knee, artwork

Protein synthesis, artwork

Gate control theory of pain, artwork

Cardiac stress test, artwork

Artist's impression of the Oort Cloud

Birth of Galaxies

Cross section of a crystal microphone.

Pluto and the Kuiper belt

Chemical composition of nicotine, conceptual image

Compton effect

Zonation of the ocean. Note that in the littoral zone the water is at the high-tide mark.

Vegetation profile of a grassland.

A grid-connected solar cell system.

Types of faulting in tectonic earthquakes.

The two sensory organs of balance: the cristae of the semicircular ducts and the maculae of the utricle and saccule.

Skylab concept sketch

Venus airship, illustration

Venus airship, illustration

Venus airship, illustration

Venus airship, illustration

Solar System Structure Out to Oort Cloud

足つぼ名称図解

足つぼ名称図解

足つぼ図解

足つぼ図解

足つぼ名称図解

足つぼ名称図解

足つぼ名称図解

足つぼ名称図解

足つぼ図解

足つぼ図解

足つぼ名称図解

足つぼ名称図解

Correct computer use position, artwork

歯の断面図　正常

下顎の歯列　正常

Male Down's syndrome karyotype, artwork

Laser eye surgery, artwork

Laser eye surgery, artwork

Human stomach, artwork

Human olfactory region, artwork

Human olfactory system, artwork

Liver and pancreas, artwork

Compression fracture, artwork

Dupuytren's contracture,artwork

Male urinary system, artwork

Kidney stone, artwork

Tear production, artwork

Situs inversus, artwork

Brain and spinal cord, artwork

Cervical conization, artwork

Female urinary system, artwork

Shoulder muscles, artwork

Heart, artwork

Asthma pathology, artwork

Eye anatomy,artwork

Kidney anatomy, artwork

Narrowed blood vessel, artwork

Narrowed blood vessel, artwork

Narrowed blood vessel, artwork

Anatomical terms, artwork

Anatomical planes of the body, artwork

Male anatomy, artwork

Male anatomy, artwork

Healthy female figure, artwork

Healthy female figure, artwork

Female reproductive system, artwork

Breast anatomy, artwork

Cardiovascular system, artwork

Collateral circulation, artwork

Heart, artwork

Narrowed coronary artery, artwork

Shoulder bones, artwork

Diagram showing interior of Jupiter

Diagram showing interior of Jupiter

Diagram showing interior of Jupiter

Internal structure of Mercury, illustration

Internal structure of Earth, illustration

Internal structure of Earth, illustration

Solar system astronomy, 19th century

Grid Earth, conceptual artwork

矢印　循環　輪

矢印　循環　輪

矢印　循環　輪

Blood alcohol concentration