Sept 2018: The variable Hubble Nebula – Dr John Lightfoot

//Sept 2018: The variable Hubble Nebula – Dr John Lightfoot
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Talk by Dr John Lightfoot of the Royal Observatory Edinburgh

NGC 2261 (also known as Hubble’s Variable Nebula or Caldwell 46) is a variable nebula located in the constellation Monoceros. The nebula is illuminated by the star R Monocerotis (R Mon), which is not directly visible itself.

The star R Monocerotis has lit up a nearby cloud of gas and dust, but the shape and brightness slowly changes visible even in small telescopes over weeks and months, and the nebula looks like a small comet.

From Wikipedia

Image Credit: NASA/ESA and The Hubble Heritage Team (AURA/STScI)