간행물
천문학논총 KCI 등재 Publications of the Korean Astronomical Society
- 발행기관 한국천문학회
- 자료유형 학술지
- 간기 연3회
- ISSN 1225-1534 (Print)2287-6936 (Online)
- 수록기간 1984 ~ 2025
- 주제분류 자연과학 > 천문학 자연과학 분류의 다른 간행물
- 십진분류KDC 440DDC 520
권호리스트/논문검색
Volume 40 Issue 3 (2025년 12월) 1건
1.
2025.12
구독 인증기관 무료, 개인회원 유료
We look at the models that calculate the positions of planets, focusing on the historical models. When Ptolemy's Earth-centered model, Copernicus' heliocentric model, and Tycho Brahe's geo-heliocentric model were expressed in vector format, they were all the same. Therefore, all three models are sufficiently good enough to calculate the positions of the planets. However, if we look closely at the models, we will see that either the epicycle or the earth-centered solar orbits used circular orbits, while the average Saturn's orbit or the heliocentric Saturn orbit used the eccentric circle for Copernicus, the equant circle for Ptolemy, and the deferent including 2-epicycles for Tycho Brahe. Currently, the planet's position is determined using the heliocentric elliptical orbits, but it can also be accurately traced using the Almagest type geocentric elliptical orbit and the elliptical epicycle.
4,600원
