Astronomical Seeing
Part 1: The Nature of Turbulence
Seeing is the astronomer's term for the relative optical quality of the Earth's atmosphere.
In general, "astronomical seeing" is improved by using filters. Red filters improve seeing the greatest and is followed by orange, then yellow, and so on.
astronomical seeing (NASA SP-7, 1965) See seeing. astronomical solar time (NASA SP-7, 1965) See solar time. astronomical time (NASA SP-7, 1965) Mean time reckoned from the upper branch of the meridian. See astronomical day.
M74-the Effects of Astronomical Seeing provides a useful split-frame image of the galaxy M74 that shows the effect that atmospheric turbulence has in the resolution obtainable from ground-based observations.
Also called astronomical seeing. Recent studies show that seeing is a combination of three principal and distinct effects that the human eye is not capable of distinguishing: (a) scintillation, i.e.
* The Hubble Space Telescope is in orbit beyond Earth's atmosphere to allow for observations not distorted by astronomical seeing. In this way the images can be diffraction limited, and used for coverage in the ultraviolet (UV) and infrared.
Refraction caused by the atmosphere, also known as astronomical seeing, limits ground-based telescopes to parallax angle measurement accuracies of less than approximately 0.
Atmospheric effects (astronomical seeing) can severely hinder the resolution of a telescope.
 See also: Atmosphere, Seeing, Planet, Earth, Density
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