Changes

Since the advent of relativity theory in the early 1900s, the laws of physics have been written in covariant equations, meaning that they are equally valid in any frame. Heliocentric and [[Geocentric theory|geocentric]] theories are both used today, depending on which allows more convenient calculations. Heliocentric coordinates have the advantage of being closer to an [[inertial reference frame]].

Since the advent of relativity theory in the early 1900s, the laws of physics have been written in covariant equations, meaning that they are equally valid in any frame. Heliocentric and [[Geocentric theory|geocentric]] theories are both used today, depending on which allows more convenient calculations. Heliocentric coordinates have the advantage of being closer to an [[inertial reference frame]].

== References ==

==References==

<references/>

<references/>

[[category:astronomy]]

 

[[Category:Astronomy]]