The Space Launch System will begin its journey with a slow crawl. Everything is running ahead of schedule and the first window for the launch will open on August 29th.

The Space Launch System (SLS) was supposed to be rolled out on Thursday, but earlier this week, NASA announced it would start moving on August 16. The SLS will leave the massive building where it has been carefully assembled and examined and head out to its launch pad tonight. It could take about 11 hours to complete, but it is a four mile trip.

The SLS rocket is designed to carry people and cargo to deep space destinations. It is more powerful than the rockets that are used to ferry astronauts from the International Space Station. SLS has been in development for more than a decade and faces a ballooning budget.

The first chance for the launch of the Artemis I mission is on August 29th. The trip will take between 39 and 42 days depending on the launch time. This is a test run for future planned missions to the moon.

The SLS could be on the launch pad as early as 9PM on Tuesday, August 16th. If you want to watch the progress, NASA will be streaming it on its Kennedy Space Center YouTube channel.