негравитациони сили

негравитациони сили

Forces that alter the path of a comet, which are not caused by gravitational interaction with the Sun and planets. Typically this refers to uneven outgassing from vents on the comet, which serve to act like rocket nozzles.

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Частина мови: noun
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Галузь/тема: Astronomy
Category: Planetary science
Company: PSRD
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метеорит

Astronomy; Planetary science

A natural solid object (metallic or stony/silicate) larger than 10 µm (microns) that has traveled through space, by natural means from the celestial body on which it formed, and ...

хелиум

Astronomy; Planetary science

An element with atomic number 2; symbol: He. It is the second most common element in the Sun and outer planets, but rare on the rocky planets.

кратер

Astronomy; Planetary science

A hole or depression. Most are roughly circular or oval in outline. On Earth most natural craters are of volcanic origin. On the Moon most are of impact origin.

магматски океан

Astronomy; Planetary science

Term used to describe the layer of magma, hundreds of kilometers thick; thought to have covered the Moon 4. 5 billion years ago. The timing, duration, cooling rates, convection, ...

астронаут

Astronomy; Planetary science

Person engaged in or trained for spaceflight.

азот

Astronomy; Planetary science

An element with atomic number 7; symbol: N. It is common in Earth's atmosphere and along with hydrogen, carbon, and oxygen is essential for life.

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Галузь/тема: Medical devices Category: Cardiac supplies

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The aortic valve is the heart's main doorway between the left ventricle and the aorta. The aortic valve can be affected by a range of problems that ...