Galaxy Articles

• Mercury
  Solar System
  Astronomy
  Sun
  Extrasolar Planets
  Pluto
   
  

  Mercury (planet)

  Mercury is the innermost and smallest planet in the solar system, orbiting the Sun once every 88 days. It ranges in brightness from about −2.0 to 5.5 in apparent magnitude, but is not easily ... > more
• Mars
  Space Missions
  NASA
  Space Exploration
  Solar System
  Space Probes
   
  

  Exploration of Mars

  The exploration of Mars has been an important part of the space exploration missions of the Soviet Union (later Russia), the United States, Europe, and Japan. Dozens of unmanned spacecraft, including ... > more
• Kuiper Belt
  Space Station
  Space Probes
  Space Exploration
  Eris (Xena)
  Astronomy
   
  

  Scaled Composites SpaceShipOne

  The Scaled Composites Model 316 SpaceShipOne is an experimental air-launched suborbital spaceplane that uses a hybrid rocket motor. The design features a unique "shuttlecock" reentry system whose ... > more
• Mathematics
  Computer Graphics
  Math Puzzles
  Mathematical Modeling
  Computer Modeling
  Computer Programming
   
  

  Ellipse

  In mathematics, an ellipse is a plane algebraic curve where the sum of the distances from any point on the curve to two fixed points is constant. An ellipse can be drawn with two pins, a loop of ... > more
• Black Holes
  Astrophysics
  Cosmology
  Astronomy
  Big Bang
  Stars
   
  

  Stephen Hawking

  Stephen William Hawking, CH, CBE, FRS (born 8 January 1942) is a theoretical physicist. Hawking is the Lucasian Professor of Mathematics at the University of Cambridge, and a Fellow of Gonville and ... > more
• Mars
  NASA
  Space Exploration
  Space Missions
  Solar System
  Space Probes
   
  

  Mars Exploration Rover

  NASA's Mars Exploration Rover (MER) Mission is an unmanned Mars exploration mission that sent two robotic rovers Spirit and Opportunity to explore the Martian surface and geology. Primary among the ... > more
• Space Station
  NASA
  Space Exploration
  Space Missions
  Space Probes
  Astronomy
   
  

  Space Shuttle Columbia

  Space Shuttle Columbia (NASA Orbiter Vehicle Designation: OV-102) was the first space shuttle in NASA's orbital fleet. Its first mission, STS-1, lasted from April 12 to April 14, 1981. On February 1, ... > more
• Quantum Physics
  Physics
  Cosmic Rays
  Black Holes
  Spintronics
  Sun
   
  

  Subatomic particle

  A subatomic particle is a particle smaller than an atom: it may be elementary or composite. Particle physics and nuclear physics concern themselves with the study of these particles, their ... > more
• Jupiter
  Space Exploration
  Astronomy
  NASA
  Sun
  Solar Flare
   
  

  Great Red Spot

  The Great Red Spot is a persistent anticyclonic storm on the planet Jupiter, 22 degrees south of the equator, which has lasted at least 340 years. The storm is large enough to be visible through ... > more
• Black Holes
  Astronomy
  Solar Flare
  Space Station
  Astrophysics
  Space Exploration
   
  

  Time

  Trying to understand time has long been a prime occupation for philosophers, scientists and artists. There are widely divergent views about its meaning, hence it is difficult to provide an ... > more

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