# Philip Johnston

Markdown copy of https://realalpha.app/builders/philip-johnston/ on Real Alpha, the best minutes from long interviews with the people building AI. Cite and link the page, not this copy.

Real Alpha has cut 4 moments of Philip Johnston (Co-founder & CEO, Starcloud) talking, from an interview on Sourcery published Oct 31, 2026.

- Role: Co-founder & CEO, Starcloud
- About: Building Starcloud’s space-based data centers to scale AI compute beyond terrestrial constraints.
- Company: [Starcloud](https://realalpha.app/companies/#starcloud)
- On X: https://x.com/PhilipJohnston

## What Philip Johnston said

- [Orbital data centers get cheaper below $500 per kilo](https://realalpha.app/s/orbital-data-centers-get-cheaper-below-500-per-kilo/)
  Sourcery · Oct 31, 2026 · 2 min
  > “in space number one we don't need permitted land so your biggest cost is gone we don't need batteries and backup power because they're 24-7 in the Sun” — Philip Johnston · [32:37](https://realalpha.app/v/mdq6urSx-f8/?t=1957)
- [Chip failures could make or break orbital data center economics](https://realalpha.app/s/chip-failures-could-make-or-break-orbital-data-center/)
  Sourcery · Oct 31, 2026 · 4 min
  > “So for StarCloud 2, we had a three-month burn-in period, it basically means you run the chips hot for three months so you can find all those failures early.” — Philip Johnston · [35:14](https://realalpha.app/v/mdq6urSx-f8/?t=2114)
- [Starcloud plans to build toward 100 satellites a week](https://realalpha.app/s/starcloud-plans-to-build-toward-100-satellites-a-week/)
  Sourcery · Oct 31, 2026 · 3 min
  > “we'll be up to a hundred a week from what we've got here so 10 a day or more than 10 a day” — Philip Johnston · [1:04:02](https://realalpha.app/v/mdq6urSx-f8/?t=3842)
- [SpaceX sets a roughly 40 Hz floor for satellite resonance](https://realalpha.app/s/spacex-sets-a-roughly-40-hz-floor-for-satellite-resonance/)
  Sourcery · Oct 31, 2026 · 6 min
  > “What SpaceX requires is that you don't have a first mode below a certain frequency. I think it's around 40 Hertz” — Philip Johnston · [46:16](https://realalpha.app/v/mdq6urSx-f8/?t=2776)

## Also from this interview

- [Falcon 9's phaseout leaves a launch gap before Starship scales](https://realalpha.app/s/falcon-9s-phaseout-leaves-a-launch-gap-before-starship/)
  Sourcery · Oct 31, 2026 · 4 min
  Starcloud booked its first rideshare 21 months ahead, and launch insurance was relatively inexpensive. But Falcon 9 is winding down before Starship is ready, and insurance cannot recover lost time.

## The episode

- [Nvidia GPUs in Orbit: Inside Starcloud’s $2B Factory](https://realalpha.app/v/mdq6urSx-f8/) · Sourcery · Oct 31, 2026