As Amazon Launches Project Kuiper, Astronomers Debate How to Fix a Satellite-Filled Sky

Amazon is set to launch two satellite prototypes for its Project Kuiper network, which will eventually number more than 3,200 orbiters. Project Kuiper could become a rival to SpaceX’s Starlink constellation, which is now nearly 4,800 strong. Amazon’s launch is planned for 2 pm Eastern time today, with a backup launch window tomorrow. This rapid growth of the satellite industry has come at a cost for astronomers and fans of the night sky, as two new studies and panels at an international astronomy conference stressed this week. 

All spacecraft in low Earth orbit reflect sunlight, and some glint enough to be visible to the naked eye—artificial constellations that compete with

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