Ryland Grace had been in space for about four months before he woke up in the ship’s medical coma at the start of Project Hail Mary.

Quick Scoop

The story is told out of order, but the key detail is that Grace does not wake up right after launch; he has already been on the ship long enough for the mission to be underway when he regains consciousness. The book and film both frame his awakening as a major reveal, which is why the timeline feels a little disorienting at first.

Timeline note

  • He wakes up after a long cruise phase, not immediately after takeoff.
  • The exact amount is generally described as months , with the commonly cited span being around four months.
  • The flashbacks fill in the missing mission prep and launch details later.

Bottom line

So, the simplest answer is: roughly four months.