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Астрономія (447)

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Brain anatomy. Artwork of a transverse section through a brain. At centre is the corpus callosum (cream), a bundle of nerve fibres that links the two hemispheres of the brain. Either side of the corpus callosum are the lobes (oval) of the thalamus. The thalamus processes sensory input and relays it to higher parts of the brain. The cream structures to the left of the thalamus are the tails of the caudate nucleus, which, along with other structures, are responsible for voluntary movement.

EN_01151355_0439
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17th Century astronomers. Historical allegorical engraving of astronomers, from Oculus artificialis teledioptricus sive telescopium, by Johann Zahn, Germany, 1685. Extract from Weltall und Menscheit (Universe and Humanity), by Hans Kraemer (ca. 1880).

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Mechanical model of the solar system.

EN_00966278_4336
rmEN_00966278_4336

Mechanical model of the solar system.

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Mechanical model of the solar system.

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Mechanical model of the solar system.

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Mechanical model of the solar system viewed from below.

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Mechanical model of the solar system viewed from above, with a nebula in the background.

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Mechanical model of the solar system viewed from above, with a nebula in the background.

EN_00966299_1199
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Illustration of a quasar, viewed from an icy, rocky celestial body. Quasars (quasistellar objects, originally known as quasistellar radio sources), are very distant starlike bodies that have extremely high energy outputs.

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Illustration showing comet Shoemaker Levy 9 with string of pearls. In 1994, July 16-22, pieces of the comet impacted Jupiter's southern hemisphere.

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Illustration showing close binary star system.

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Star on rim of total eclipse.

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Digital Image of Earth and Moon in Space

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Satellite and Earth

EN_00961205_4088
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Computer Illustration

EN_00958297_0947
EN_00958297_0947

Optical image of Mars with an illustration showing it's core, mantle and crust. Current studies say its core consists primarily of iron with about 14-17% sulfur, and is about 1480 km in radius. The core is surrounded by a silicate mantle that formed many of the tectonic and volcanic features on the planet, but now appears to be inactive. The average thickness of the planet's crust is about 50 km, while the maximum thickness is about 125 km. In comparison, Earth's crust, averages 40 km, and is only one third as thick as the crust of Mars.

EN_00958297_0948
EN_00958297_0948

Optical image of Mars with an illustration showing it's core, mantle and crust. Current studies say its core consists primarily of iron with about 14-17% sulfur, and is about 1480 km in radius. The core is surrounded by a silicate mantle that formed many of the tectonic and volcanic features on the planet, but now appears to be inactive. The average thickness of the planet's crust is about 50 km, while the maximum thickness is about 125 km. In comparison, Earth's crust, averages 40 km, and is only one third as thick as the crust of Mars.

EN_00958297_0949
EN_00958297_0949

Illustration showing the core, mantle and crust of Jupiter; the fifth planet from the sun and the largest in the solar system. Jupiter has a rocky core and is surrounded by a dense metallic hydrogen layer, which extends outward to about 78 percent of the radius of the planet.

EN_00958297_0950
EN_00958297_0950

Illustration showing the core, mantle and crust of Jupiter; the fifth planet from the sun and the largest in the solar system. Jupiter has a rocky core and is surrounded by a dense metallic hydrogen layer, which extends outward to about 78 percent of the radius of the planet.

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