Apparent motion information

Apparent retrograde motion is the apparent motion of a planet in a direction opposite to that of other bodies within its system, as observed from a particular...

Apparent motion may refer to: Aberration of light, an apparent shift in position of celestial objects due to the finite speed of light and the motion...

Diurnal motion (from Latin diurnus 'daily', from Latin diēs 'day') is an astronomical term referring to the apparent motion of celestial objects (e.g...

The term illusory motion, also known as motion illusion or "apparent motion", is an optical illusion in which a static image appears to be moving due...

the ecliptic at two points known as the equinoxes. The Sun, in its apparent motion along the ecliptic, crosses the celestial equator at these points,...

hours. The apparent sun is the true sun as seen by an observer on Earth. Apparent solar time or true solar time is based on the apparent motion of the actual...

The term phi phenomenon is used in a narrow sense for an apparent motion that is observed if two nearby optical stimuli are presented in alternation with...

high-speed camera, are processed to produce information based on the apparent motion in the images. In some applications, the camera is fixed relative to...

The term beta movement is used for the optical illusion of apparent motion in which the very short projection of one figure and a subsequent very short...

viewer does not notice the interruptions due to flicker fusion. The apparent motion on the screen is the result of the fact that the visual sense cannot...

not at the center of the Sun's motion, but at some distance from the center. This model described the apparent motion of the Sun fairly well. It is known...

Apparent magnitude (m) is a measure of the brightness of a star or other astronomical object. An object's apparent magnitude depends on its intrinsic luminosity...

Effect, is an illusion related to human visual perception involving apparent motion. In a simplified explanation of one form of the illusion, two discs...

appears to move from left to right. In Antarctica, the equivalent apparent motion is from right to left. This occurs at latitudes ranging from approximately...

their apparent daily motion is caused by the daily rotation of the Earth. The Earth is moved in a sphere around the Sun, causing the apparent annual...

in 1676 that light does not travel instantaneously by studying the apparent motion of Jupiter's moon Io. Progressively more accurate measurements of its...

at high velocities. Light echoes can also produce apparent superluminal motion. Superluminal motion occurs as a special case of a more general phenomenon...

photograph that uses long exposure times to capture diurnal circles, the apparent motion of stars in the night sky due to Earth's rotation. A star-trail photograph...

it on the left. Literally, it means to take a course opposite the apparent motion of the sun viewed from the Northern Hemisphere (the face of this imaginary...

apparent distance between one celestial object and another, as seen from a third body during a given period. Appulse is seen in the apparent motion typical...

speed and direction of the apparent motion of the Moon, Sun, and planets. In particular it explained the apparent retrograde motion of the five planets known...

reaching an apparent visual magnitude of about −2.7. The star's proper motion will peak around one arcminute per year, a rate of apparent motion that would...

accurately maintain the tracking by a telescope of a celestial body, whose apparent motion through the sky is primarily due to Earth's rotation. Accurate telescope...

The principles of sundials are understood most easily from the Sun's apparent motion. The Earth rotates on its axis, and revolves in an elliptical orbit...

Motion sickness occurs due to a difference between actual and expected motion. Symptoms commonly include nausea, vomiting, cold sweat, headache, dizziness...