Constellation Space
@constspace
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We are building the OS for Space. Backed by @ycombinator and @nvidia.
San Francisco, CA
Joined December 2025
non-consumer hardware represents ~15% of @ycombinator W26 hard-tech is back. spacetech: @axionorbital - Foundation models for 24/7 Earth Observation @constspace - AI for space mission assurance @gru_space - Building the first hotel on the Moon @KytenTech - Custom battery
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We're hiring! Constellation Space is building the operating system for space - a unified platform that powers next-generation satellite networks, ground infrastructure, and autonomous space operations. Apply here: https://t.co/iCTg9kMnbr
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Space is the future.
š²
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The satellite boom.
LEā01 update: @Arianespace is targeting Feb. 12 to send 32 Amazon Leo satellites into orbit. LE-01 (Leo Europe 1) is the first of 18 Leo missions on the more powerful, four-booster variant of Ariane 6, and the first heavyālift launch on our 2026 manifest. Follow along for more:
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Constellation (@constspace) predicts satellite network failures before they happen and automatically reroutes traffic in secondsāno human intervention, no data loss. Congrats on the launch @kamranmajid11, @raaidkabir, @laithaustin, @omeedtehrani! https://t.co/HKs6ixtuk3
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Amazing!
NEWS: The FCC has just authorized @SpaceX to deploy and operate up to 15,000 next-gen satellites (up from 7,500). "This expansion will enable SpaceX to deliver high-speed, low-latency internet service globally, including enhanced mobile and supplemental coverage from space."
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Why does LEO feel real time? LEO satellites are popular because theyāre close to Earth. Signals donāt have to travel as far, which means lower delay and faster response times. Thatās why modern satellite internet, imaging, and tracking systems favor LEO over higher orbits.
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Intuitively, why would it be hard for humans to manage this alone? With a handful of satellites, humans can manage problems manually. With thousands, that breaks down. Events happen faster than people can react, especially at orbital speeds. At scale, systems have to
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Most people think satellites talk directly to the internet. They donāt. They talk to ground stations! Physical sites with giant antennas that act as the bridge between space and fiber. Space is wireless. The internet is still very terrestrial.
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Fun Fact! A satelliteās latitude/longitude doesnāt exist. It has an orbit. We compute its position at a given time using TLEs (Two-Line Elements) + orbital propagation. Space is math, not maps. š°ļø
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Do you think satellites overheat more often or freeze? Put your answer below! š
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Do satellites spend more time in sunlight or darkness? Drop your guess š
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Do satellites spend more time in sunlight or darkness? Drop your guess š
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Do you think satellites overheat more often or freeze? Put your answer below! š
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Fun Fact! A satelliteās latitude/longitude doesnāt exist. It has an orbit. We compute its position at a given time using TLEs (Two-Line Elements) + orbital propagation. Space is math, not maps. š°ļø
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Most people think satellites talk directly to the internet. They donāt. They talk to ground stations! Physical sites with giant antennas that act as the bridge between space and fiber. Space is wireless. The internet is still very terrestrial.
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Hereās a cool visualization of JUST space debris surrounding earth!
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Intuitively, why would it be hard for humans to manage this alone? With a handful of satellites, humans can manage problems manually. With thousands, that breaks down. Events happen faster than people can react, especially at orbital speeds. At scale, systems have to
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Why is space more crowded than it looks? Space looks empty, but Low Earth Orbit is a very thin shell around the planet. Thousands of satellites share this narrow band. As more are added, traffic increases - not just in quantity, but in complexity. Crowded systems behave very
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