поляр шұғыласы

One of about a dozen of the strongest Fraunhofer lines seen in the Solar spectrum, the A band at 7600 angstoms is due to telluric lines of molecular oxygen in the Earth's ...

А жұлдызы

Astronomy; General astronomy

Star with spectral type A in which the spectrum of the Balmer lines of hydrogen attain their greatest strength. Helium lines can no longer be seen. Some metallic lines are ...

Ахиллес

Astronomy; General astronomy

Trojan asteroid (60° ahead of Jupiter. It was the first Trojan to be discovered.

атомдық нөмір (заряд нөмірі)

Astronomy; General astronomy

The number of protons in an atom's nucleus. This determines the type of element.

азимут

Astronomy; General astronomy

1) Angular distance from the north point eastward to the intersection of the celestial horizon with the vertical circle passing through the object and the zenith. 2) Directional ...

азимуттың кванттық нөмірі (к)

Astronomy; General astronomy

A measure of the minor axis of an elliptic orbital of an electron according to the Bohr-Sommerfeld theory.

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Bransch/domän: Events Category: Disasters

Чернобыль

A disaster which occurred in the Chernobyl power plant in 1986, where one out of four nuclear reactors in the plant exploded, resulting in at least 5% ...