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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.

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Industrija/področje: 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.

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, ...

негравитациони сили

Astronomy; Planetary science

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 ...

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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Industrija/področje: Festivals Category: Easter

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An annual Christian festival in commemoration of the resurrection of Jesus Christ, observed on the first Sunday after the first full moon after the ...