Below is a full video guide with detailed commentary.
You need to obtain the Launch Codes and take off in your ship. Then you need to locate the planet Giant's Deep. Now you need to get to approximately 450kms away from the planet and approach the planet from that distance in order to work up enough speed to break through the current.
Make sure you lock onto the planet and keep aligned with the planet by making sure there are little or no white dots during your approach (as shown in the video).
Hitting the planet on the right angle and with enough speed will unlock the achievement.