Star Articles

• Black Holes
  Astronomy
  Galaxies
  Stars
  Astrophysics
  Nebulae
   
  

  Supernova

  A supernova (plural supernovae) is a stellar explosion which produces an extremely bright object made of plasma that declines to invisibility over weeks or months. A supernova briefly outshines its ... > more
• Black Holes
  Cosmology
  Astronomy
  Satellites
  Space Exploration
  Asteroids, Comets and Meteors
   
  

  Introduction to general relativity

  General relativity (GR) is the geometrical theory of gravitation published by Albert Einstein in 1916. It unifies Einstein's earlier special relativity with Sir Isaac Newton's law of universal ... > more
• Black Holes
  Cosmic Rays
  Stars
  Astronomy
  Astrophysics
  Sun
   
  

  Gravitational wave

  In physics, in terms of a metric theory of gravitation, a gravitational wave is a fluctuation in the curvature of space-time which propagates as a wave, traveling outward from a moving object or ... > more
• Solar System
  Pluto
  Kuiper Belt
  Satellites
  Eris (Xena)
  Moon
   
  

  Dysnomia (moon)

  Dysnomia, is a moon of the dwarf planet Eris. The satellite is about 60 times fainter than Eris, and its diameter is estimated to be approximately eight times smaller. Astronomers now know that three ... > more
• Mars
  Extrasolar Planets
  Solar System
  NASA
  Space Missions
  Space Exploration
   

  Astrobiology

  Astrobiology is the study of life in space, combining aspects of astronomy, biology and geology. It is focused primarily on the study of the origin, distribution and evolution of ... > more
• Asteroids, Comets and Meteors
  Astronomy
  Stars
  Space Exploration
  Space Telescopes
  Sun
   
  

  Comet Hale-Bopp

  Comet Hale-Bopp was probably the most widely observed comet of the 20th century, and one of the brightest seen for many decades. It was visible to the naked eye for a record 18 months, twice as long ... > more
• Galaxies
  Astrophysics
  Cosmology
  Astronomy
  Big Bang
  Space Telescopes
   
  

  Large-scale structure of the cosmos

  In physical cosmology, the term large-scale structure refers to the characterization of observable distributions of matter and light on the largest scales (typically on the order of billions of ... > more
• Geomagnetic Storms
  Sun
  Solar Flare
  Renewable Energy
  Energy and the Environment
  Wind Energy
   
  

  Solar wind

  A solar wind is a stream of charged particles (i.e., a plasma) which are ejected from the upper atmosphere of a star. When originating from stars other than the Earth's Sun, it is sometimes called a ... > more
• Galaxies
  Astrophysics
  Astronomy
  Stars
  NASA
  Space Telescopes
   
  

  Galaxy

  A galaxy is a massive, gravitationally bound system consisting of stars, an interstellar medium of gas and dust, and dark matter. Typical galaxies range from dwarfs with as few as ten million stars ... > more
• Astronomy
  Astrophysics
  Extrasolar Planets
  Galaxies
  Solar System
  Stars
   
  

  Astronomy

  Astronomy is the scientific study of celestial objects (such as stars, planets, comets, and galaxies) and phenomena that originate outside the Earth's atmosphere (such as the cosmic background ... > more

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