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The online observatory will host a special broadcast of Comet 21P/Giacobini-Zinner on Monday (Sept. 3) at 10 p.m. EDT (0200 GMT on Sept. 4). Watch it live here. Slooh's astronomers will take questions posted with the hashtag #Slooh and discuss the history and the science of the celestial event. Watch it live here in the window above, courtesy of Slooh, or directly on

From Slooh:

"In preparation for Comet 21P/Giacobini-Zinner's perihelion (closest to the Sun) on September 10th, Slooh will be turning our telescopes to catch a live look before its close approach. On the night of September 3rd, the comet will lie just over 1 degree from bright star Capella in Auriga, making it far easier to spot. Tune in for some Labor Day entertainment at 10pm EDT. 

"Comet 21P/Giacobini-Zinner was first discovered by Michael Giacobini in 1900 and was actually rediscovered in 1913, two passages later, by Ernst Zinner. It circles the sun and returns every 6.5 years. It currently is making its closest approach, or perihelion, to the sun on September 10th, 2018. At its closest point, the comet will be approximately 36 million miles from Earth. 
"While Comet 21P is only about 2km in diameter, it's a big deal in that it’s the parent body to the Draconids Meteor Shower which peaks every year in October. 
"Join Slooh Astronomers Paul Cox and Dr. Paige Godfrey, as well as Slooh’s Storyteller Helen Avery to see Comet 21P and learn all about comets and what they mean to us ground observers."



Editor's note: If you snap an amazing comet photo and would like to share it with for a story or photo gallery, send comments and images to 

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