World Book Encyclopedia Use the article outline to choose the right section
Britannica Online - You can select the reading level
Cosmic Distance Scale from NASA's Imagine the Universe
Scale of the Universe interactive from AAAS Netlinks
Milky Way from Astronomy, Elementary: Gale in Context
Milky Way Galaxy from Encyclopedia Britannica
Galaxies from The Blackbirch Encyclopedia of Science & Invention Elementary: Gale in Context
Galaxies from Astronomy, Elementary: Gale in Context
Andromeda from Astronomy, Elementary: Gale in Context
Local Group from Astronomy Magazine, Middle School: Gale in Context
Local Group (short definition) from Encyclopedia Britannica (level 3)
Local Group from the website Imagine the Universe, NASA
Solar System from Astronomy, Elementary: Gale in Context
Solar System from Blackbirch Encyclopedia of Science & Invention Elementary: Gale in Context
Solar System from World Book
Solar System from Encyclopedia Britannica
Solar System from World of Earth Science (Science in Context)
Solar System from Growing Up with Science
Star from Growing Up with Science
Sun: Solar Exploration from Kidhaven Science Library, Elementary: Gale in Context
Sun - Earth's Star from Sun, Elementary: Gale in Context
Sun from World Book
Sun from Growing Up with Science
Earth from Astronomy, Elementary: Gale in Context
Earth from UXL Encyclopedia of Science, Middle School: Gale in Context
Earth from Growing Up with Science
Universe from Blackbirch Encyclopedia of Science & Invention Elementary: Gale in Context
Universe from Encyclopedia Britannica
Space from Astronomy, Elementary: Gale in Context
Universe from UXL Encyclopedia of Science, Middle School: Gale in Context
Universe from Growing Up with Science
Space from Astronomy, Elementary: Gale in Context
Galaxy from Britannica Online
Galaxy UXL Encyclopedia of Science, Middle School: Gale in Context
Virgo Supercluster - Universe Today (Website)
New Galactic Supercluster Map Shows Milky Way's "Heavenly" Home - Space.com (Website)