unidad de masa atómica (u, dalton)

unidad de masa atómica (u, dalton)

The masses of atoms and molecules are generally given in atomic mass units. These units are based on a scale in which the mass of carbon 12 is taken to be 12. Atomic masses were originally given as atomic weights on a scale where the mass of the hydrogen atom was unity, later they were based on oxygen or oxygen 16; these scales have all been replaced by the carbon 12 scale.

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نوع المصطلح: اسم
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المجال / النطاق: علم الفلك
الفئة: فلك عام
Company: Caltech
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Sistema de Procesado de imágenes astronómicas

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Developed by the National Radio Astronomy Observatory.

órbita

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The path of one object about another (used here for an object orbiting the sun).

meteoros

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Small rocky and/or icy particles that are swept up by the earth in its orbit about the sun. Also called "shooting stars", they travel across the sky in a very short time, from ...

equinoccio

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Either of the two points (vernal, autumnal) on the celestial sphere where the ecliptic (which is the apparent path of the sun on the sky) intersects the celestial equator. Due to ...

cometa

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A celestial body orbiting the sun (though some may be ejected from the solar system by planetary perturbations) that displays (at least during a portion of its orbit) some ...