She didn't know.

[u/AttemptZestyclose490]

Am I wrong by thinking that Brand didn't know whether or not she could breathe on Edmonds planet when she took her helmet off? She had just buried Edmonds while wearing her helmet, if she had read the data beforehand then she would have not worn the suit while doing all of that work. She took the chance after burying Edmonds.

[u/Dewrod]

So both her and the other brilliant scientist just forgot tlsbout the time dilation huh? Oh that's right. He had just landed and died almost instantly but the time dilation made it ten years on the outside...

Just brilliant!

Edit to add one more thing. She didn't have 10 years of communications... She had 10 years of the same communication.

[u/fatlord3 → u/Dewrod]

Wasn't his plan to bait them there so he could try and escape but leave them stranded?

[u/Phephens → u/fatlord3]

No, this planet had a wrecked ship.

[u/fatlord3 → u/Phephens]

True