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Astronomical Events September 2020

Welcome the equinox in September with these astronomy events happening this month!

Stock up on telescope accessories to produce the best images of the night sky. Do you have clouds guaranteed almost all month? Come hang out with the OPT Team on Twitch at ClearSkiesNetwork for daily astronomy talks, gear help, and live streaming from OPT’s remote observatories as part of the OPT Observatory Project.

Download your FREE calendars here and save the date!

Moon Phases and Planets September 2020

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September 2 - Full Moon

This full Moon was known by some early Native American tribes as the Corn Moon because the corn is harvested around this time of year.

September 11 - Neptune at Opposition

The blue giant planet will be at its closest approach to Earth and it’s face will be fully illuminated by the Sun. Neptune is extremely far away from Earth so this is the best time to view and image Neptune. It will mainly appear as a tiny blue dot in most telescopes except professional grade telescopes like a Planewave.

September 17 - New Moon

This is the best time of the month to observe faint objects such as galaxies and star clusters because there is no moonlight creating light pollution.

Northern Hemisphere Constellations September 2020

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  • The North America Nebula (NGC 7000).
  • Pelican Nebula (IC 5070 and IC 5067).
  • The Gamma Cygni Nebula (Sadr Region, IC 1318).
  • Crescent Nebula (NGC 6888).
  • The Tulip Nebula (Sharpless 101).
  • The Veil Nebula (NGC 6960, NGC 6992, NGC 6995, NGC 6974, and NGC 6979), a large 5,000 year old supernova remnant!
  • Open clusters Messier 29 and Messier 39.
  • Fireworks Galaxy (NGC 6946).
  • Blinking Planetary Nebula (NGC 6826), a nebula with an eye-like shape.
  • Galactic Ghoul (DR 6 nebula) named for its spooky appearance that resembles a human face.
  • NGC 6910, an open cluster nicknamed the Rocking Horse Cluster.


  • NGC 6891 and NGC 6905, also known as the Blue Flash Nebula.
  • The globular clusters NGC 6934 and NGC 7006.


  • Open clusters NGC 6885 and NGC 6823.
  • The reflection nebula NGC 6820.
  • The elliptical galaxy NGC 7052.
  • The Seyfert galaxy 3C 433.
  • Dumbbell Nebula (M27).


  • Faint spiral galaxies NGC 7015, NGC 7040, and NGC 7046.

Southern Hemisphere Constellations September 2020

astronomical events september 2020


  • Messier 30.
  • Spiral galaxy NGC 6907.


  • Faint spiral galaxies NGC 6925 and NGC 6923.
  • The Microscopium Void, a stretch of empty space discovered in 1984. It occupies an area that is about a half of the constellation’s diameter in size.


  • The spiral galaxy NGC 7090.
  • Lenticular galaxy NGC 7049.


Curious what astronomical events are happening the rest of 2020? Check out our astronomical events calendar for all of 2020! If you're looking to get started in astrophotography, check out our beginner's guide here. Clear skies! 🔭✨

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