Space Telescope Articles

• Venus
  Solar System
  Astronomy
  Sun
  NASA
  Space Exploration
   
  

  Transit of Venus

  A transit of Venus across the Sun takes place when the planet Venus passes directly between the Sun and the Earth, obscuring a small portion of the Sun's ... > 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
• Atmosphere
  Geomagnetic Storms
  Northern Lights
  Solar Flare
  Sun
  Ozone Holes
   
  

  Ionosphere

  The ionosphere is the part of the atmosphere that is ionized by solar radiation. It plays an important part in atmospheric electricity and forms the inner edge of the magnetosphere. It has practical ... > more
• Space Station
  Space Missions
  ESA
  Space Exploration
  NASA
  Space Probes
   
  

  European Space Agency

  The European Space Agency (ESA), established in 1975, is an inter-governmental organisation dedicated to exploration of space with currently 17 member states. ESA has ambitious space plans that may ... > 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
• Uranus
  Solar System
  Astronomy
  Pluto
  Jupiter
  Moon
   
  

  Uranus

  Uranus is the seventh planet from the Sun. It is a gas giant, the third largest by diameter and fourth largest by mass. NASA's Voyager 2 is the only spacecraft to have visited the planet and no other ... > more
• Galaxies
  Stars
  Astronomy
  Astrophysics
  Black Holes
  Extrasolar Planets
   
  

  Globular cluster

  A globular cluster is a spherical collection of stars that orbits a galactic core as a satellite. Globular clusters are very tightly bound by gravity, which gives them their spherical shapes and ... > more
• Galaxies
  Astronomy
  Stars
  Astrophysics
  Solar Flare
  Black Holes
   
  

  Milky Way

  The Milky Way is a barred spiral galaxy which forms part of the Local Group. Although the Milky Way is but one of billions of galaxies in the universe, the Galaxy has special significance to humanity ... > more
• Asteroids, Comets and Meteors
  Solar System
  NASA
  Astronomy
  Pluto
  Moon
   
  

  Near-Earth object

  Near-Earth objects (NEO) are asteroids, comets and large meteoroids whose orbit intersects Earth's orbit and which may therefore pose a collision danger. Due to their size and proximity, NEOs are ... > more
• Black Holes
  Astronomy
  Galaxies
  Stars
  Astrophysics
  Nebulae
   
  

  Supernova

  A supernova (plural supernovae) is a stellar explosion which produces an extremely bright object made of plasma that declines to invisibility over weeks or months. A supernova briefly outshines its ... > more

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