At the Kennedy Space Center in Brevard County, Florida, Elon Musk’s SpaceX and NASA are preparing for a historic moment that will happen today at 4:33 ET.

This launch is the first orbital launch in the U.S. since 2011 and a milestone in commercial areospace travel.

“We are once again launching American astronauts on American rockets from American soil,” NASA Administrator Jim Bridenstine said during a news conference Tuesday. “This is a big moment in time. It’s been nine years since we’ve had this opportunity.”

data-instgrm-captioned data-instgrm-version="4" style=" background:#FFF; border:0; border-radius:3px; box-shadow:0 0 1px 0 rgba(0,0,0,0.5),0 1px 10px 0 rgba(0,0,0,0.15); margin: 1px; max-width:658px; padding:0; width:99.375%; width:-webkit-calc(100% - 2px); width:calc(100% - 2px);">

The NASA astronauts, Robert Behnken and Douglas Hurley expect to spend one to three months in space.

Kids haven’t seen this in their lifetime and many little space fans are looking forward to the launch, which can be streamed live through NASA’s site.

If the Florida weather doesn’t cooperate today the launch will happen on Saturday, May 30.

The latest

Life

7 months pregnant on the campaign trail: How motherhood has changed the way I view politics

Style

Zooey Deschanel’s tips on how to get holiday party-ready (without putting your finger through your tights while your kids are yelling for dinner)

Motherly Stories

What is the ‘gratitude trap’? How gratitude can keep us stuck

Getting Pregnant

What to know about using supplements for fertility—and when to start taking them in preconception