ecliptic orbit
51Mercury (planet) — Mercury  ☿ …
52Definition of planet — Photograph of the crescent planet Neptune (top) and its moon Triton (center) …
53Makemake (dwarf planet) — Makemake Makemake as seen by the Hubble Space Telescope Discovery Discovered by …
54Classical Kuiper belt object — The orbits of various cubewanos compared to the orbit of Neptune (blue) and Pluto (pink) …
55Milankovitch cycles — Past and future Milankovitch cycles. VSOP allows prediction of past and future orbital parameters with great accuracy. ε is obliquity (axial tilt). e is eccentricity. ϖ is longitude of perihelion. esin(ϖ) is the precession index, which together… …
56Astronomical clock — An astronomical clock is a clock with special mechanisms and dials to display astronomical information, such as the relative positions of the sun, moon, zodiacal constellations, and sometimes major planets. DefinitionThe term is loosely used to… …
57Mars — This article is about the planet. For other uses, see Mars (disambiguation) …
58astronomical map — Introduction any cartographic representation of the stars, galaxies, or surfaces of the planets and the Moon. Modern maps of this kind are based on a coordinate system analagous to geographic latitude and longitude. In most cases, modern… …
59Detached object — Trans Neptunian objects beyond 100AU: SDO (in grey) and detached objects (in white) Detached objects are a dynamical class of bodies in the outer Solar System beyond the orbit of Neptune. These objects have orbits whose points of closest approach …
60Hipparchus — (Greek polytonic|Ἵππαρχος; ca. 190 BC ndash; ca. 120 BC) was a Greek astronomer, geographer, and mathematician of the Hellenistic period.Hipparchus was born in Nicaea (now Iznik, Turkey), and probably died on the island of Rhodes. He is known to… …
