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veličina

Astronomical brightness measured on a logarithmic scale, based on the ancient practice of noting that the brightest stars in the sky were of "first importance" or "first magnitude", the next brightest being "second magnitude" etc. The human eye is a logarithmic detector, and in 1854 Pogson formalized this scale and defined a difference of 5 magnitudes to be exactly a factor of 100 in brightness. The scale is calibrated to the bright star Vega which is defined to have a magnitude of 0. For reference, the faintest naked-eye magnitude visible from a dark site is +6. Comet C/1996 B2 Hyakutake reached magnitude 0 in late March 1996.

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nuklearna veličina
Astronomy; General astronomy

See definition for m 2 , above.

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veličina otvora kroz koji tvar prolazi membranu

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Water movement due to differences in the density of the water from place to place usually caused by changes in the amount of material held in suspension or changes in temperature ...

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The growth of planets from smaller objects by impact, one impact at a time. After formation, planets are said to have "accreted" from small objects.

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A deviation from the common rule, type, or form; something abnormal or inconsistent.

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A sensor for measuring temperature. It consists of two dissimilar metals, joined together at one end, which produce a small voltage proportional to the temperature.

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Study of the origin, distribution, and destiny of life in the universe. These are interdisciplinary studies involving astronomers, astrophysicists, biologists, chemists, ...

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