

|  | 
				No information avaiable			 
				
					http://www.aavso.org/				
							 
						popularity:
						 
							astronomy						 
							science						 
							space						 
							variables						 
							stars						 
							research						 
							reference						 
							education						 
							physics						 
							astro						 | 
|  | 
					No information avaiable				 
							similarity:
							 
							popularity:
							 
								science							 
								astronomy							 
								space							 
								reference							 
								encyclopedia							 
								physics							 
								technology							 
								energy							 
								news							 
								education							 | 
|  | 
					KidsAstronomy.com is a powerful astronomy websited designed to introduce children to the facinating ... KidsAstronomy.com, part of the KidsKnowIt Network, is the ...				 
							similarity:
							 
							popularity:
							 
								astronomy							 
								science							 
								space							 
								kids							 
								education							 
								solar_system							 
								planets							 
								solarsystem							 
								games							 
								interactive							 | 
|  | 
					Find planets, stars and constellations quickly and easily in the night sky with the AstroViewer night sky map				 
							similarity:
							 
							popularity:
							 
								astronomy							 
								science							 
								sky							 
								map							 
								stars							 
								space							 
								reference							 
								planets							 
								visualization							 
								software							 | 
|  | 
					Track seasonal cusp moments in universal time, according to the Earth's orbit. Includes lessons on the astronomical mechanics of equinoxes, soltices, and cross quarters.				 
							similarity:
							 
							popularity:
							 
								astronomy							 
								science							 
								calendar							 
								space							 
								reference							 
								archeoastronomy							 
								education							 
								archaeoastronomy							 
								time							 
								pagan							 | 
|  | 
					02. Observable Universe and Beyond. 03. Superclusters. 04. ... 15. Elementary Particles and the World of Planck Scale. 16. Frontier of Science. 17. Appendices ...				 
							similarity:
							 
							popularity:
							 
								science							 
								astronomy							 
								physics							 
								space							 
								universe							 
								reference							 
								theory							 
								learning							 
								education							 
								evolution							 | 
|  | 
					No information avaiable				 
							similarity:
							 
							popularity:
							 
								astronomy							 
								meteors							 
								science							 
								meteorshower							 
								space							 
								meteor							 
								reference							 
								calendar							 
								meteorshowers							 
								stars							 | 
|  | 
					Downloadable real-time space simulation that lets users experience the universe in three dimensions.				 
							similarity:
							 
							popularity:
							 
								astronomy							 
								space							 
								software							 
								science							 
								simulation							 
								freeware							 
								opensource							 
								3d							 
								free							 
								education							 | 
|  | 
					No information avaiable				 
							similarity:
							 
							popularity:
							 
								astronomy							 
								physics							 
								astrophysics							 
								science							 
								database							 
								research							 
								reference							 
								nasa							 
								space							 
								library							 | 
|  | 
					General facts and statistical information about planets, moons, constellations, stars, galaxies, and Messier objects.				 
							similarity:
							 
							popularity:
							 
								astronomy							 
								science							 
								reference							 
								encyclopedia							 
								space							 
								research							 
								resources							 
								resource							 
								knowledge							 
								photography							 | 
|  | 
					The World's Top Scientists Heard 15 Million Times a Day				 
							similarity:
							 
							popularity:
							 
								science							 
								astronomy							 
								space							 
								news							 
								education							 
								environment							 
								radio							 
								reference							 
								earth							 
								podcast							 | 
 an example search result
			an example search result