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- Astronomy (13970 bytes)
1: ...ution]], and [[Astrophysics|physical]] and [[chemical]] properties of objects that may be observed in ...
3: ...llo 11]] as they circled the [[Moon]] in 1969. Located near the center of the [[Far side (Moon)|far s...
5: ... correlated to the apparent positions of astronomical objects in the sky -- although the two fields sh...
8: ... trying to observe and understand the actual physical nature of celestial objects—what makes the...
10: ...d mainly with figuring out the observational implications of different models, and involves working wi... - Planetary system (2476 bytes)
1: ...ystem which contains the [[Earth]] and [[Sun]] is called the [[Solar System]].
7: ... of the mass of the central star would see them escape the gravitational hold of the star. One theory...
9: == Significant planetary systems ==
14: * [[55 Cancri]] - the largest extra solar planetary system ... - Planet (8450 bytes)
7: ...bject to approval by the [[International Astronomical Union]]'s panel on nomenclature). The process o...
10: ...:Solare_Planeten99.jpg|framed|Planets in approx. scale of size, but not distance. Note a portion of th...
12: ... to the authority of the [[International Astronomical Union]], there are nine planets in our solar sys...
13: # [[Mercury (planet)|Mercury]] ([[astronomical symbol]] ☿)
24: ===Classification=== - History of science in early cultures (11033 bytes)
3: ...ture]], which allowed for a surplus of food, it became possible for early [[Civilization|civilizations...
6: ...92 BC]], [[Field Museum of Natural History]],[[Chicago]]. ([[Palm]]-sized)]]
7: ...pages.com/swadhwa/hofa/mesopotamia.html (astronomical)-->
9: ...h extremely thorough [[quantitative]] and [[numerical]] data. But their observations and measurements ...
11: ...y tablets. [[Hipparchus]] was to use this data to calculate the [[precession]] of the [[Earth]]'s axis... - Star (12279 bytes)
3: ...hining points in the nighttime sky that twinkle because of the effect of the [[Earth]]'s [[atmosphere]...
7: ...discs, where the Sun and Earth are located. Stars can be much closer to each other in the centres of g...
11: ...long extinct, however, and currently only theoretical.
13: ...stars and [[gas giant]]s. The minimum mass a star can have is estimated to be in the vicinity of 75 Ju...
15: Scientifically, stars are defined as [[Gravity#Self-gravitati...
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