Talk:Rich Purnell/@comment-31131540-20170124000050/@comment-38532571-20190215161441

consider this.

1. Ion engines have a very low thrust so the deceleration procces can last for a very long time.

2. KSP solar system is 10 times smaller than our solar system.

3. The Hermes do try to decelerate before trying to catch Watney and Watney have to travel at a fast speed in order to catch up with the hermes.

4. That probe could accelerate to match velocity with Hermes, not a big deal, it 2030s after all