NASA Articles

• Astrophysics
  Optics
  Physics
  Chemistry
  Sports Science
  Graphene
   
  

  Spectroscopy

  Spectroscopy is the study of spectra, that is, the dependence of physical quantities on frequency. Spectroscopy is often used in physical and analytical chemistry for the identification of ... > more
• Satellites
  Space Probes
  Space Station
  Space Exploration
  NASA
  Space Telescopes
   
  

  Militarisation of space

  The militarisation of space1 is the placement and development of weaponry in outer space by the militaries of the ... > 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
• 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
• Sun
  Solar Flare
  Asteroids, Comets and Meteors
  Black Holes
  Satellites
  Space Exploration
   
  

  Earth's magnetic field

  Earth's magnetic field (and the surface magnetic field) is approximately a magnetic dipole, with one pole near the geographic north pole and the other near the geographic south pole. The locations of ... > more
• Sun
  Black Holes
  Moon
  Asteroids, Comets and Meteors
  Solar Flare
  Pluto
   
  

  Precession

  Precession refers to a change in the direction of the axis of a rotating object. In certain contexts, "precession" may refer to the precession that the Earth experiences, the effects of this type of ... > more
• Stars
  Galaxies
  Astronomy
  Nebulae
  Astrophysics
  Extrasolar Planets
   
  

  Open cluster

  An open cluster is a group of up to a few thousand stars that were formed from the same giant molecular cloud, and are still loosely gravitationally bound to each other. In contrast, globular ... > more
• Sports Science
  Ancient Civilizations
  Fossils
  Solar Flare
  Technology
  Moon
   
  

  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
• Albert Einstein
  Black Holes
  Physics
  Quantum Physics
  Cosmology
  Sports Science
   
  

  General relativity

  General relativity (GR) is the geometrical theory of gravitation published by Albert Einstein in 1915. It unifies special relativity and Sir Isaac Newton's law of universal gravitation with the ... > 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

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