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General astronomy
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General astronomy
vernal equinox
Astronomy; General astronomy
specific moment in the year (on March 21) when the Sun is directly on the celestial equator, moving north of the celestial equator.
weather
Astronomy; General astronomy
the ever-changing combination of winds, clouds, temperature, and pressure at a particular location and time. Short timescale description of an atmosphere in contrast to climate.
weight
Astronomy; General astronomy
amount of the force of gravity felt by an object. It is measured in units of newtons. It depends on the strength of the surrounding gravity field.
white dwarf
Astronomy; General astronomy
the collapsed core for a dead low-mass star. The core is less than 1.4 solar masses and is about the diameter of the Earth. The pressure from degenerate electrons prevents further collapse.
Wien's law
Astronomy; General astronomy
relation between the wavelength of maximum emission in a thermal spectrum and its temperature: wavelength peak in nanometers = 2.9× 106/temperature in Kelvin.
zenith
Astronomy; General astronomy
point on the celestial sphere that is always directly above the observer regardless of his/her location.
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