Counter-Earth
Sign in to saveAlso known as Antichthon
thumb|250px|right|Philolaus believed there was a "Counter-Earth" (Antichthon) orbiting the "Central Fire" (not labeled) that was not visible from Earth. The upper illustration depicts Earth at night while the lower one depicts Earth in the day. The Counter-Earth is a hypothetical body of the Solar System that orbits on the other side of the Solar System from Earth, e.g. at the L3 Lagrange point of the Sun–Earth system. A Counter-Earth, or Antichthon (), was hypothesized by the pre-Socratic Greek philosopher Philolaus () to support his non-geocentric cosmology, in which all objects in the unive
In the Vinony graph
Vinony's link graph records 286 inbound references to Counter-Earth, and connects out to geocentric model, Lagrangian point and ancient Greek astronomy.
It sits within the topics Ancient Greek astronomy, Early scientific cosmologies and Hypothetical astronomical objects.
Vinony links it to 22 Wikipedia language editions.
Wikidata facts
- Parent body
- Sun
- Orbital period
- 365.24219
- Image
- Antichthon.svg
Show 4 more facts
- Commons category
- Counter-Earths
- semi-major axis of an orbit
- 1
- orbital eccentricity
- 0.0167
- orbital inclination
- 0.002
Sources (1)
via Wikidata · CC0
~9 min read
Encyclopedic overview
11 sectionsContents
- Greek Pythagorean universe
- Counter-Earth<!--Linked from 'Pythagorean astronomical system'-->
- Later
- Modern era
- Detectability
- In fiction
- See also
- Notes
- References
- Further reading
- External links
thumb|250px|right|Philolaus believed there was a "Counter-Earth" (Antichthon) orbiting the "Central Fire" (not labeled) that was not visible from Earth. The upper illustration depicts Earth at night while the lower one depicts Earth in the day. The Counter-Earth is a hypothetical body of the Solar System that orbits on the other side of the Solar System from Earth, e.g. at the L3 Lagrange point of the Sun–Earth system. A Counter-Earth, or Antichthon (), was hypothesized by the pre-Socratic Greek philosopher Philolaus () to support his non-geocentric cosmology, in which all objects in the universe revolve around a "Central Fire" (unseen from Earth and distinct from the Sun which also revolves around it).
In modern times, a hypothetical planet always on the other side of the Sun from Earth has been called a "Counter-Earth", and has been a recurring theme in UFO claims, as well as in fiction (particularly science fiction).
Excerpted from Wikipedia’s “Counter-Earth” article, available under the CC BY-SA 4.0 licence.