The sixth flight test of SpaceX's Starship megarocket is targeted to launch during a 30-minute window that opens at 5 PM EST (2100 GMT; 4 PM local Texas time). 

The next Starship test flight aims to push the envelope of Starship and booster capabilities and prepare the entire launch system for reuse. 

"Objectives include the booster once again returning to the launch site for catch, reigniting a ship Raptor engine while in space, and testing a suite of heatshield experiments and maneuvering changes for ship reentry and descent over the Indian Ocean," SpaceX's website wrote. 

Elon Musk outlined Starship Flight 6's objectives on X:

Musk pointed out, "Current Starship is more than twice as powerful as the Saturn V Moon rocket. Starship V3, which hopefully flies in about a year, will be 3X more powerful."

Even before the two-stage megarocket — featuring the Starship spacecraft stacked atop the Super Heavy booster — launches late afternoon, prediction market platform Polymarket has allowed users to wager on whether the Mechazilla arms (or chopsticks) at the Starbase launchpad near Brownsville, Texas, will successfully catch the Starship as it returns to Earth.

Last month's Starship Flight 5 marked a historic success.

The Polymarket bet is titled "Will the chopsticks catch SpaceX's Super Heavy?" With about seven hours left before launch, users overwhelmingly bet confidently (about 80%) that chopsticks will successfully catch Starship. About $286k have traded on the contract so far. 

Polymarket has made betting on binary events in the news cycle possible. 

Watch the sixth Starship flight test:

Meanwhile, Gwynne Shotwell, president of SpaceX, told investors last Friday that the company plans hundreds of Starship rocket launches during President Trump's second term.

There is a report from Politico that President-elect Trump plans to watch the Starship launch with Musk in Texas.