It's that time again.
Elon Musk will unveil the latest SpaceX Marship-Colonization space architecture design tonight (September 28) during a presentation at the company's facilities in South Texas, near Boca Chica Village.
The talk, which will occur at 8 a.m. EDT (7:00 a.m. CDT, 0000 GMT), will be broadcast live online. You can watch it live here in the opening hours as well as on Space.com's homepage. You can watch the live broadcast directly from SpaceX here.
The billionaire entrepreneur has been making such updates every September since 2016. Many things have changed since then, including the name of the architecture, which moved from the Interplanetary Transport System at BFR to the current moniker, Starship and Super Heavy.
More: SpaceX completes the assembly of a new prototype of a starship (photo)
Then it has a size. Musk says in 201
The basic design concept, however, came to fruition: a two-stage system consisting of a Starship vehicle in the latest iteration, stacked on top of a huge Super Heavy rocket. Musk said both would be fully and quickly usable.
Starship and Super Heavy will be powered by the next generation of SpaceX's Raptor engine. The 100-passenger stainless steel ship will have six Raptors, while the first-stage rocket boasts 35 engines.
Or so we think now; we'll have to wait until tomorrow night to hear if those numbers have changed.
Musk will have a nice visual aid during the presentation: the newly assembled Starship Mk1 three-engine prototype that SpaceX plans to launch for the first time in October. The Mk1, which is 50 feet (50 meters) high, will first aim for a height of 20 miles (20 kilometers) and eventually conduct orbital test flights, Musk said.
SpaceX also builds a similar vehicle, the Starship Mk2, at the company's Florida facility. Musk said the competition between the two construction efforts should improve Starship's final design,
The final Starship could reach the sky very soon if the test campaign continues to go well. (SpaceX has already withdrawn from its first prototype – the tiny, single-engine Starhopper vehicle.) The Starship-Super Heavy duo could launch communications satellites as early as 2021, SpaceX officials say.
And Japanese billionaire Yusaku Maezawa has booked a crew of flights around the moon aboard the system, with a target launch date of 2023.
Editor's note: This story has been updated to include information for a webcast of SpaceX for an update on Elon Musk's Starship update.
Mike Wall's book on the search for extraterrestrial life, " There " (Grand Central Publishing, 2018; illustrated by Carl Tate ), is out. Follow him on Twitter @michaeldwall . Follow us on Twitter @Spacedotcom or Facebook .