Space Probe Articles

• Black Holes
  Cosmology
  Space Station
  NASA
  Astronomy
  Space Probes
   

  Presentism (philosophy of time)

  In the philosophy of time, presentism is the belief that neither the future nor the past exists. The opposite of presentism is 'eternalism', which is a belief in things that are past and things that ... > more
• Physics
  Albert Einstein
  Quantum Physics
  Black Holes
  Sports Science
  Cosmic Rays
   
  

  Special relativity

  Special relativity inter-relates space and time in such a way that the speed of light is constant, and the theory leads to situations where two observers can disagree over time intervals and ... > more
• Cosmology
  Cosmic Rays
  Astrophysics
  Big Bang
  Astronomy
  Black Holes
   
  

  Cosmic microwave background radiation

  In cosmology, the cosmic microwave background radiation is a form of electromagnetic radiation discovered in 1965. It has a thermal black-body spectrum which peaks in the microwave range. Most ... > more
• Nebulae
  Stars
  Space Telescopes
  Astrophysics
  Galaxies
  NASA
   
  

  Orion Nebula

  The Orion Nebula (also known as Messier 42, M42, or NGC 1976) is a glowing emission nebula with a greenish hue and is situated below Orion's Belt. It is one of the brightest nebulae visible to the ... > more
• Astrophysics
  Dark Matter
  Cosmology
  Astronomy
  Big Bang
  Black Holes
   
  

  Dark energy

  In physical cosmology, dark energy is a hypothetical form of energy that permeates all of space and tends to increase the rate of expansion of the universe. Assuming the existence of dark energy is ... > more
• Galaxies
  Astrophysics
  Astronomy
  Space Telescopes
  NASA
  Space Exploration
   
  

  Barred spiral galaxy

  A barred spiral galaxy is a spiral galaxy with a band of bright stars emerging from the center and running across the middle of the ... > more
• Cosmology
  Cosmic Rays
  Astrophysics
  Big Bang
  Astronomy
  Black Holes
   
  

  Cosmic microwave background radiation

  In cosmology, the cosmic microwave background radiation is a form of electromagnetic radiation discovered in 1965 that fills the entire universe. It has a thermal 2.725 kelvin black body spectrum ... > more
• Alternative Fuels
  Astrophysics
  Fuel Cells
  Organic Chemistry
  Energy and Resources
  Galaxies
   
  

  Hydrogen

  Hydrogen is a chemical element in the periodic table that has the symbol H and atomic number 1. At standard temperature and pressure it is a colorless, odorless, nonmetallic, univalent, tasteless, ... > more
• Optics
  Aviation
  Vehicles
  Satellites
  Physics
  NASA
   
  

  Infrared

  Infrared (IR) radiation is electromagnetic radiation of a wavelength longer than that of visible light, but shorter than that of microwave radiation. The name means "below red", red being the color ... > more
• Astrophysics
  Cosmology
  Big Bang
  Dark Matter
  Astronomy
  Black Holes
   
  

  Big Bang

  The Big Bang is the cosmological model of the universe whose primary assertion is that the universe has expanded into its current state from a primordial condition of enormous density and ... > more

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