planetary contrast
81Earth — This article is about the planet. For other uses, see Earth (disambiguation). Earth   …
82Rare Earth hypothesis — In planetary astronomy and astrobiology, the Rare Earth hypothesis argues that the emergence of complex multicellular life (metazoa) on Earth required an improbable combination of astrophysical and geological events and circumstances. The term… …
83Methods of detecting extrasolar planets — Any planet is an extremely faint light source compared to its parent star. In addition to the intrinsic difficulty of detecting such a faint light source, the light from the parent star causes a glare that washes it out. For those reasons, only a …
84List of Solar System objects by size — Objects in the Solar System By orbit By size By discovery date …
85Tycho Brahe — This article is about the astronomer Tycho Brahe. For other uses, see Tycho Brahe (disambiguation). Tycho Ottesen Brahe Born 14 December 1546 Knutstorp Castle, Scania Died 24 October 1601 (age …
86Callisto (moon) — Callisto View of the heavily cratered terrain of Callisto s anti Jovian hemisphere obtained in 2001 by NASA s Galileo spacecraft. The large impact structure Asgard is on the limb at upper right. The prominent rayed crater below and just right of… …
87Abū Rayhān Bīrūnī — Infobox Muslim scholars | era = Matthew Deal image caption = Biruni on a 1973 Iranian post stamp commemorating his one thousandth anniversary | name = Abū Rayhān Muhammad ibn Ahmad Bīrunī title= Abu Rayhan Biruni birth = 15 September 973 AD|… …
88Habitable zone — Goldilocks planet redirects here. For the planet initially nicknamed Goldilocks , see 70 Virginis b. For other uses, see Goldilocks (disambiguation). Goldilocks Zone and Comfort zone (astronomy) redirect here. For other uses, see Comfort zone… …
89analysis — /euh nal euh sis/, n., pl. analyses / seez /. 1. the separating of any material or abstract entity into its constituent elements (opposed to synthesis). 2. this process as a method of studying the nature of something or of determining its… …
90Cosmology in medieval Islam — Islamic cosmology refers to cosmology in Islamic societies. It is mainly derived from the Qur an, Hadith, Sunnah, and current Islamic as well as other pre Islamic sources. The Qur an itself mentions seven heavens[1] and a vast universe sustained… …
