2017 From Memoryal day to Labor Day

General Rules and Rewards

Celestial Chart Astrophotography Instagram contest rewards the author that receives most likes.


  • A choice of a Celestial Chart Sky Map
  • The winner picture printed in a photographic paper with size up to 40×30 cm (24”x36”) depending on the picture resolution


(Click here to see all the subscribed pictures)

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To qualify for the contest, you need:

1. Follow @celestialchart_us on Instagram

2. Post your picture using your personal public Instagram profile with the following comments on the legend:

@celestialchart #celestialchart2017 #astrophotography

2.1. Any additional comment is permitted, we recommend a brief description on the objetcs featured n the picture and the thecnical details of the camera, lens and telescope (if used)

We highly recommend the posting of your astrophotography along with a print-screen of the sky map for location, date and time, generated from http://celestialchart.com, indicating the area of the sky where the object is located; if sucessive shots are used, the map should be for any moment during the session​.

Purpose and What is Allowed 

We want you to look to the skies every night, with or without a telescope, with or without a specific target. It doesn’t matter if you have something in mind to search in the heavens, just look and contemplate. And, please, never lose the ability to really enjoy it, even if you are a professional astronomer or an experienced amateur. Try to constantly look at the sky as if it were the very first time, and feel before thinking happens.

A very special way to exercite the look to the sky in the search of beauty before anything is Astrophotography. We will give one of our Sky Maps, at the choice of the winner, to the author of the most liked subscribed astrophotography on Instagram. Beside the Sky Map (an original Celestial Chart) there is also another special gift: the printed picture in a photographic paper .

Keep in mind that there is no requirement for complex equipment or technics to take Astrophotography. Your cellphone can probably register astonishing sunsets or the moon over a beautiful mountain. Share your views to show people how possible is to see beautiful scenes involving the sky in our daily lives.

If you are mor experienced and have more powerful equipment, you’ll be able to capture more difficult shots, especially of deep sky objects. Spread your talent and fondness showing impressive and inspiring views of the Universe.

Our contest is focused on astrophotography, so, please be sure to understand this definition: Astrophotography is a photograph of the sky that shows with good definition at least one celestial object.

Cloudy sky is not astrophotography, even if you can see the brightness of the Sun trough the clouds.

Pictures of landscape and the sky are allowed and encouraged, i.e. a sunset on the sea or the moonlight over a beautiful ancient building. Note that in these cases, the Sun or the Moon should be clear.


  • Separeted celestial objects
  • Sets of celestial objects
  • Celestial objects and landscape details
  • Image calibration using features like colors balance, exposure time  and temperature control, etc.
  • Stacking images

Not Allowed:

  • Sky pictures that are not astrophotography (as we said above: astrophotography is a photograph of the sky that shows with good definition at least one celestial object)
  • Artificial image composition

For more information on the contest, please contact us at



See some examples of good and not so good astrophotography.

Picture by Mauricio Arbex, on May 23, 2017, named “Star Trails Around Soth Celestial Pole”. Note that the author compose the sky with a mountain. Details: Camera Canon T3, 18mm lens, ISO 200, 109 frames with 30s exposure each. (Source: Spaceweather Image Gallery)

Another nice composition with a road, using a nice effect due to exposure time. Details Nikon D700, 24mm f/3.5, 120 seconds, ISO 1600 single exposure. (Source: Geartacular)

Single deep sky object, Orion Nebula. Stars trailed a bit, and focus could be improved. Took with an iPhone 6 and a telescope. (Source: iAstrophotography)

Picture showing Jupiter and the Moon, by a cellphone to share via Whatsapp and Instagram this beautiful configuration. ET says “look at the Moon tonight!”. Neighborhood around Pontifical Catholic University of Rio de Janeiro. Details: Cellphone Samsung Galaxy S3. (Source: Leandro L S Guedes‘s cellphone)

This is a beautiful cloudy sky, but NOT an astrophotography. (Source: Patternpictures)