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Related Book ReviewsAstrophysics -- Astrophysics is the branch of astronomy that deals with the physics of the universe, including the physical properties (luminosity, density, temperature and chemical composition) of astronomical ... > full article Large-scale structure of the cosmos -- Astronomy and cosmology examine the universe to understand the large-scale structure of the cosmos. Currently, many large structures have been found; stars are organised into galaxies which in turn ... > full article Galaxy formation and evolution -- The formation of galaxies is still one of the most active research areas in astrophysics; and, to some extent, this is also true for galaxy evolution. Some ideas, however, are now widely accepted. ... > full article Space observatory -- A space observatory is any instrument in outer space which is used for observation of distant planets, galaxies, and other outer space objects. A large number of observatories have been launched into ... > full article Supergiant -- Supergiants are the most massive stars. Supergiants can have masses from 10 to 70 solar masses and brightness from 30,000 up to hundreds of thousands times the solar luminosity. They vary greatly in ... > full article Star cluster -- Star clusters are groups of stars which are gravitationally bound. Two distinct types of star cluster can be distinguished: globular clusters are tight groups of hundreds of thousands of very old ... > full article Galaxy -- A galaxy is a massive gravitationally bound system of stars, interstellar gas and dust, and dark matter. Typical galaxies contain ten million to one trillion stars, all orbiting a common center of ... > full article Spitzer space telescope -- Spitzer Space Telescope (formerly the Space Infrared Telescope Facility [SIRTF]) is an infrared space observatory, the fourth and final of NASA's Great Observatories. The first images taken by SST ... > full article Stellar evolution -- In astronomy, stellar evolution is the sequence of changes that a star undergoes during its lifetime; the hundreds of thousands, millions or billions of years during which it emits light and heat. ... > full article Light-year -- A light-year or lightyear, symbol ly, is the distance light travels in vacuum in one terrestrial year. The nearest known star (other than the Sun), Proxima Centauri is 4.22 light years ... > full article
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