Charts using the perspective of the Sun as the center Earth appears in these charts, instead of the Sun The further a planet is from the Sun, the less its geocentric position varies from its heliocentric one The inner planets (Mercury and Venus) can vary by as much as 180 degrees
From the viewpoint of the Sun Modern Western astrology is generally Geocentric (from the viewpoint of the Earth) Planetary positions appear different from the heliocentric viewpoint
Referring to the sun A heliocentric orbit is one based on the sun as one of the two foci of the (elliptical) orbit (or as the center of a circular orbit); a heliocentric magnitude is the brightness of an object as would be seen from a heliocentric distance of 1 AU (which means a distance of 1 AU from the sun)
Refers to the sun A heliocentric correction is applied to transform measurements to correspond to what an observer at the center of the Sun would see Common heliocentric corrections are for the up-to-8 minute light travel time across one astronomical unit, or for the 30 km/s orbital velocity of the Earth The barycentric correction to the center of mass of the Solar System is more physically meaningful, but is harder to compute and is unwarranted for many purposes