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“parallax”
parallax
1. In physics, an apparent change in the position of an object when the person looking at the object changes position.
2. In astronomy, the angle between two imaginary lines from two different observation points meeting at a star or celestial body that is used to measure its distance from the Earth.
2. In astronomy, the angle between two imaginary lines from two different observation points meeting at a star or celestial body that is used to measure its distance from the Earth.
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“parallax”
The change in an astronomical object's apparent position: A geocentric parallax is caused by the change in the observer's earthly position because of the motion of the Earth during the day.
This entry is located in the following units:
centro-, centr-, centri-, kentro-
(page 7)
geo-, ge- +
(page 5)
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“parallax”
parallax
1. The angular displacement undergone by the position of a star when observed from two different points.
2. The change in the apparent position of an object against its background when viewed from two different positions.
2. The change in the apparent position of an object against its background when viewed from two different positions.
In astronomy, nearby stars show a shift owing to parallax when viewed from different positions on the earth's orbit around the sun. A star's parallax is used to determine its distance from the earth.
Nearer bodies, such as, the moon, sun, and planets also show a parallax caused by the motion of the earth.
This entry is located in the following unit:
Astronomy and related astronomical terms
(page 18)
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“parallax”
diurnal parallax
The change in an astronomical object's apparent position caused by the change in the observer's position because of the motion or rotation of the earth during a day.
This entry is located in the following unit:
Astronomy and related astronomical terms
(page 8)