15Nov
By: Astroathens On: November 15, 2016 In: Astronomy Comments: 1
  • Gravitational lensing.
  • Light distortion caused by bodies of mass bending light.
  • We see light that was sent from galaxies thousands of light years in the past.
  • Sometimes observing this light may appear distorted or even in a different spot in the sky than where it actually is.
  • This is due to light BENDING when traveling from its source, passing a massive body such as a galaxy cluster in which interferes and causes the light to bend.
  • By the time this light reaches us, it can completely throw off calculations, imagery and location accuracy.
  • All due to these darn objects getting in the middle of the light’s path from point A (the source) to point B (us).

NASA/ESA

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