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Giant Molecular Cloud

  • Largest type of interstellar medium
    • Very large and dense
      • ~6000 known with 10510^5 to 10610^6 solar masses
      • 10210^2 to $10^5% hydrogen molecules per cubic centimetre
  • 50-300 light-year away
  • Complex molecules can form deep inside
    • Protected from high-energy rays and particles that would break them ups

Astronomy Interstellar Medium