Dichotomy
The appearance of a half illumination phase as seen in a telescope. It can occur as much as a week later than the maximum for .
Global Dichotomy
The leading hemisphere of is covered by extremely dark material, whereas the trailing hemisphere is covered with bright material.
Comet impacts explain Ganymede-Callisto dichotomy
DR EMILY BALDWIN
ASTRONOMY NOW
Posted: 25 January 2010 ...
Dichotomy When the phase is exactly 50%.
Diffraction limited A measure of optical quality in which the performance is limited only by the size of the theoretical diffracted image of a star for a telescope of that aperture.
Dichotomy. The instant when an object is exactly half lit as seen from Earth. It is usually applied to the Moon or an inferior planet.
False dichotomy between Science and Creationism
There are NOT just two sides in this issue that deserve equal time.
The dichotomy of Martian topography is striking: northern plains flattened by lava flows contrast with the southern highlands, pitted and cratered by ancient impacts.
dichotomy (NASA SP-7, 1965) In astronomy, a configuration of three bodies so that they form a right triangle; specifically, such a configuration in the solar system with the sun at the apex of the 90° angle.
This dichotomy is repaired by Einstein's theory of gravitation, wherein accelerated masses also produce signals (gravitational waves) that travel only at the speed of light.
Distance to the Sun (Lunar Dichotomy)
Aristarchus claimed that at half moon (first or last quarter moon
Lunar phase ...
Most ID folks lump evolution in with philosophical materialism and therefore, anyone supporting evolution is an atheist. So there is now a false dichotomy: we have to choose between "naturalism" (philosophical materialism) and "supernaturalism" (God) ...
The reasons for this global dichotomy and abrupt boundary are unknown (some speculate that they are due to a very large impact shortly after Mars' accretion). Mars Global Surveyor has produced a nice 3D map of Mars that clearly shows these features.
The figure highlights the two other significant components of martian topography: the Tharsis province and the Hellas impact basin. Here we have not removed shorter-wavelength topographic features, including those comprising the dichotomy boundary ...
moon, edited by John Wallis in 1688, describes a theoretically valid method for determining the relative distances of the sun and moon by measuring the angle between their centres when half the lunar disk is illuminated; but the time of dichotomy ...
 See also: Earth, Field, Planet, Model, Solar
  
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