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Person engaged in or trained for spaceflight.

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Settore/Dominio: Astronomia
Categoria: Planetologia
Company: PSRD
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метеорит

Astronomia; Planetologia

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

Astronomia; Planetologia

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

Astronomia; Planetologia

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

Astronomia; Planetologia

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

Astronomia; Planetologia

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 ...

азот

Astronomia; Planetologia

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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Settore/Dominio: Vacanze Categoria: Festività nazionali

Канада Ден

Канада ден го слави на Сојузот на трите британски колонии (Нова Шкотска, Њу Бранзвик, и провинција на Канада) во она што е денешна Канада. Британскиот ...