Venus 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
• Earth Science
  Geology
  Geomagnetic Storms
  Near-Earth Object Impacts
  Stars
  Asteroids, Comets and Meteors
   
  

  Precession of the equinoxes

  The precession of the equinoxes refers to the precession of Earth's axis of rotation with respect to inertial space. The precession of the equinoxes is caused by the differential gravitational forces ... > more
• NASA
  Space Telescopes
  Astronomy
  Space Exploration
  Satellites
  Galaxies
   
  

  Spitzer Space Telescope

  Spitzer Space Telescope (formerly the Space Infrared Telescope Facility [SIRTF]) is an infrared space observatory, the fourth and final of NASA's Great Observatories. The first images taken by SST ... > more
• Solar Flare
  Sun
  Northern Lights
  Solar System
  Astronomy
  Cosmic Rays
   
  

  Solar flare

  A solar flare is a violent explosion in the Sun's atmosphere with an energy equivalent to tens of millions of hydrogen bombs. Solar flares take place in the solar corona and chromosphere, heating ... > more
• Space Station
  NASA
  Space Missions
  Space Exploration
  Astronomy
  Space Probes
   
  

  Space suit

  A space suit is a complex system of garments and equipment and environmental systems designed to keep a person alive and comfortable in the harsh environment of outer ... > 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
• Sun
  Solar Flare
  Northern Lights
  Astronomy
  Solar System
  Extrasolar Planets
   
  

  Sunspot

  A sunspot is a region on the Sun's surface (photosphere) that is marked by a lower temperature than its surroundings and intense magnetic activity, which inhibits convection, forming areas of low ... > more
• NASA
  Space Telescopes
  Space Exploration
  Galaxies
  Astrophysics
  Black Holes
   
  

  Hubble Deep Field

  The Hubble Deep Field (HDF) is an image of a small region of the sky, based on the results of a series of observations by the Hubble Space Telescope. The field is so small that only a few foreground ... > more
• Cosmology
  Big Bang
  Astrophysics
  Dark Matter
  Black Holes
  Astronomy
   
  

  Ultimate fate of the universe

  The ultimate fate of the universe is a subject of study in the field of cosmology. Vying scientific theories predict whether the life of the universe is finite or infinite. Current understanding of ... > 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

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