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- Astronomy (13970 bytes)
1: ...arth]] and its [[earth's atmosphere|atmosphere]]. It studies the [[Cosmology|origins]], [[Galaxy forma...
3: ...the [[Far side (Moon)|far side]] of Earth's Moon, its diameter is about 58 miles (93 km).]]
5: ... the two fields share a common origin, they are quite different; astronomers embrace the [[scientific ...
8: ..., and modern astronomy concerns itself much more with trying to observe and understand the actual phys...
10: ...ations of different models, and involves working with computer or analytic models. - Planetary system (2476 bytes)
1: ...uch as [[asteroid]]s, [[comet]]s, [[natural satellite|moon]]s, and [[planet]]s). Our own planetary sy...
5: ...lesced to form the planets. However, the probability of such a near collision is now known to be far ...
7: ...ow form in the [[accretion disk]] which surrounds pulsars.
11: ...m discoverd, the first multi planet system with a pulsar discovered
15: ...]] star and the first discovered to be in an [[orbital resonance]] - Planet (8450 bytes)
1: ...since 1995 of over 150 planet-sized objects in orbit around other stars, the problem of defining a pla...
3: ...tostellar disk before the star's core ignited and its [[solar wind]] blew remaining material away.
5: ==Within the solar system==
7: ...ich is named for a [[Greek Mythology|Greek]] god. It should be noted that some non-European languages,...
12: According to the authority of the [[International Astronomical Union]], the... - History of science in early cultures (11033 bytes)
3: ...riculture]], which allowed for a surplus of food, it became possible for early [[Civilization|civiliza...
9: ...on]]s of the world with extremely thorough [[quantitative]] and [[numerical]] data. But their observat...
11: ...]]s and [[omen]]s, which might explain the popularity of the clay tablets. [[Hipparchus]] was to use t...
16: ...mical basis, have been found in third millennium cities of [[India]]. Their design can be conservative...
21: ...ctilinear structures, and the post and lintel architecture of Egypt. Egypt was also a center of [[Alch... - Star (12279 bytes)
3: ...ir distance from us. The Sun is also a star, but it is close enough to Earth to appear as a disk inst...
5: ...per second -- almost 30,000 kilometers per hour), it would take about 150,000 years to get there.
9: ...erametre]]s. However, these have a much lower density than the Sun.
11: ... elements heavier than [[lithium]] in their composition. This generation of supermassive star is long ...
13: ... have is estimated to be in the vicinity of 75 Jupiters.
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