By the time you are going for this achievement you should basically be drowning in money so just know that this will take a lot of it to complete. Rockets are cumulative over all playthroughs however, you should be able to do this in one good playthrough. I would recommend finishing the story (terraforming mars) before starting to heavily focus on this achievement.

1. Cargo to Mars is launched automatically once you hire the fleet manager. So produce Cybertrucks and Material endlessly in your Gigafactories. He will continuously send them to Mars and will rack up a lot of launches.

2. Make as many Small/Medium/Large rockets as you can (40 each) and the facilities to go with them. Manually launch them full of concrete (I would avoid sending up LinkLink on these because too many LinkLink satellites will cause your game to lag - you can also turn off satilite view and LinkLink outline to stop lag). Doing this I was able to easily able to get 60+ launches per year.

3. Make sure you have as many launchpads as possible, this will ensure that your managers will continue to launch ships.

4. Make the maximum amount of Cargo Spaceships and Superheavy rockets (40 each) so that as many rockets can be launched by your managers as possible.

5. Build lots of Mega Hangers so that your Spaceships aren't sitting around waiting to land for long periods of time.

6. Make sure you have enough landing pads on Mars for all of your Spaceships to land so they aren't waiting.

7. Build lots of fuel storage and factories on Mars so that your ships aren't waiting to get fueled and can take off quickly.

8. Don't rely completely on your managers to complete launches. It will go much faster if you also launch rockets.

9. I launched a lot of rockets half full so that I could get more launches with the same amount of cargo (like I said at the beginning money shouldn't be an issue by the time you do this achievement).

10. When manually launching large quantities of rockets I would recommend keeping your camera on the Moon. It can get pretty laggy when you try to launch 30+ rockets at the same time and since none of them are leaving from the moon it doesn't really affect your game there.

11. Leave your game running; even with all of the tips I gave in this guide this achievement will still take many hours to complete so I would recommend finding something else to do while you wait.

If you have any other tips that helped you get the achievement you can leave them in the comments and I'll add them to the guide.