Cosmic Ray Articles

• Nebulae
  Stars
  Galaxies
  Astrophysics
  Astronomy
  Extrasolar Planets
   
  

  Planetary nebula

  A planetary nebula is an astronomical object consisting of a glowing shell of gas and plasma formed by certain types of stars at the end of their lives. They are in fact unrelated to planets; the ... > more
• Stars
  Galaxies
  Astrophysics
  Astronomy
  Extrasolar Planets
  Solar Flare
   

  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 ... > more
• Space Station
  Asteroids, Comets and Meteors
  NASA
  Space Exploration
  Satellites
  Space Probes
   
  

  Space debris

  Space debris or orbital debris, also called space junk and space waste, are the objects in orbit around Earth created by man that no longer serve any useful purpose. They consist of everything from ... > more
• Sports Science
  Ancient Civilizations
  Fossils
  Solar Flare
  Technology
  Sun
   
  

  Antikythera mechanism

  The Antikythera mechanism is an ancient mechanical analog computer (as opposed to digital computer) designed to calculate astronomical positions. It was discovered in the Antikythera wreck off the ... > more
• Stars
  Astrophysics
  Galaxies
  Nebulae
  Extrasolar Planets
  Astronomy
   
  

  Stellar classification

  In astronomy, stellar classification is a classification of stars based initially on photospheric temperature and its associated spectral ... > more
• Asteroids, Comets and Meteors
  Astronomy
  Solar System
  Sun
  Solar Flare
  Space Exploration
   
  

  Comet

  A comet is a small body in the solar system that orbits the Sun and (at least occasionally) exhibits a coma (or atmosphere) and/or a tail - both primarily from the effects of solar radiation upon the ... > more
• NASA
  Space Telescopes
  Astrophysics
  Space Exploration
  Galaxies
  Sports Science
   
  

  Edwin Hubble

  Edwin Powell Hubble (November 20, 1889 - September 28, 1953) was an American astronomer, noted for his discovery of galaxies beyond the Milky Way and the cosmological redshift. Edwin Hubble was one ... > more
• Satellites
  Moon
  Pluto
  Neptune
  Sun
  NASA
   

  Geosynchronous orbit

  A geosynchronous orbit is a geocentric orbit that has the same orbital period as the sidereal rotation period of the Earth. It has a semi-major axis of 42,164 km (26,200 miles). In the special case ... > more
• Asteroids, Comets and Meteors
  Near-Earth Object Impacts
  Atmosphere
  Earth Science
  Geology
  Mars
   
  

  Meteor

  A meteor is the visible path of a meteoroid that enters the Earth's (or another body's) atmosphere, commonly called a shooting star or falling star. A meteor is a meteoroid that has entered the ... > more
• Albert Einstein
  Black Holes
  Physics
  Quantum Physics
  Sports Science
  Asteroids, Comets and Meteors
   
  

  Gravitation

  Gravity is a force of attraction that acts between bodies that have mass. Gravity is the reason for the very existence of the earth, the sun and other celestial bodies; without it matter would not ... > more

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