Star Articles

• Galaxies
  Stars
  Astronomy
  Nebulae
  Astrophysics
  Space Telescopes
   
  

  Magellanic Clouds

  The two Magellanic Clouds are irregular dwarf galaxies orbiting our Milky Way galaxy, and thus are members of our Local Group of galaxies.The Large Magellanic Cloud (LMC) and its neighbour and ... > more
• Space Telescopes
  NASA
  Space Exploration
  Black Holes
  Astronomy
  Cosmic Rays
   
  

  Chandra X-ray Observatory

  Chandra X-ray Observatory is a satellite launched on STS-93 by NASA on July 23, 1999. It was named in honor of Indian-American physicist Subrahmanyan Chandrasekhar who is known for determining the ... > more
• Pluto
  Kuiper Belt
  Extrasolar Planets
  Solar System
  Eris (Xena)
  Astronomy
   
  

  Definition of planet

  The definition of "planet" has for some time been the subject of intense debate. Although the word dates back thousands of years, no officially decreed scientific definition of "planet" existed ... > more
• Extrasolar Planets
  Solar System
  Jupiter
  Astronomy
  Kuiper Belt
  Stars
   
  

  Gas giant

  A gas giant is a large planet that is not primarily composed of rock or other solid matter. Gas giants may have a rocky or metallic core—in fact, such a core is thought to be required for a gas ... > more
• Astronomy
  Galaxies
  Cosmic Rays
  Black Holes
  Solar Flare
  Stars
   
  

  Light-year

  A light-year or lightyear (symbol: ly) is a unit of measurement of length, specifically the distance light travels in a vacuum in one year. While there is no authoritative decision on which year is ... > more
• Extrasolar Planets
  Kuiper Belt
  Stars
  Astronomy
  Pluto
  Eris (Xena)
   
  

  Extrasolar planet

  An extrasolar planet, or exoplanet, is a planet beyond the Solar System. As of 11 November 2006, 209 extrasolar planets have been discovered. Known exoplanets are members of planetary systems that ... > more
• Space Telescopes
  Space Exploration
  NASA
  Space Station
  Astronomy
  Satellites
   
  

  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 ... > more
• NASA
  Space Telescopes
  Astronomy
  Space Exploration
  Satellites
  Galaxies
   
  

  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 ... > more
• Galaxies
  Stars
  Astronomy
  Astrophysics
  Black Holes
  Extrasolar Planets
   
  

  Globular cluster

  A globular cluster is a spherical collection of stars that orbits a galactic core as a satellite. Globular clusters are very tightly bound by gravity, which gives them their spherical shapes and ... > more
• Galaxies
  Astronomy
  Astrophysics
  Stars
  NASA
  Space Telescopes
   
  

  Andromeda Galaxy

  TThe Andromeda Galaxy (also known as Messier 31, M31, or NGC 224; older texts often called it the Andromeda Nebula) is a spiral galaxy approximately 2.5 million light-years away in the constellation ... > more

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