What makes hypergolic rocket propellants special?

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  1. They ignite as soon as fuel and oxidizer touch
  2. They only burn in the vacuum of space
  3. They are frozen solid until launch

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References

  1. NASA, Testing Continues for Satellite Servicing Capabilities www.nasa.gov/technology/testing-continues-for-satellite-servicing-capabilities Checked 2026-10-10.

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