The Starship rocket is a key component of SpaceX's success as it aims to go public in June, valued between $1.5 and 2 trillion.

Ahead of a much anticipated IPO, SpaceX is carrying out a critical test of its giant, stainless steel rocket. Investors will be watching closely.

SpaceX’s Starship-Super Heavy performs a wet dress rehearsal tanking test in preparation for the 12th integrated test flight of the launch vehicle. Image: SpaceX