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Endnotes
- Scientific Organizing Committee
- International Astronomical Union
- Two-Line Element
- Treaty on Principles Governing the Activities of States in the Exploration and Use of Outer Space, including the Moon and Other Celestial Bodies, 1966, https://www.unoosa.org/oosa/en/ourwork/spacelaw/treaties/outerspacetreaty.html
- https://www.unoosa.org/oosa/en/ourwork/spacelaw/treaties/status/index.html
![](http://upload.wikimedia.org/wikipedia/commons/thumb/2/22/Constellation_satellites_in_low_Earth_orbits.jpg/600px-Constellation_satellites_in_low_Earth_orbits.jpg)
In May 2019 SpaceX launched its first batch of 60 Starlink communication satellites, which surprised astronomers and lay people with their appearance in the night sky. Astronomers have accumulated observations of constellation satellites and run computer simulations of their likely impact to thoroughly understand the magnitude and complexity of the problem. This research informed the discussion at the Satellite Constellations workshops (SATCON1 and SATCON2) and led to recommendations for observatories and constellation operators. Credit: NOIRLab/NSF/AURA/P. Marenfeld
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