KENNEDY SPACE CENTER, Fla. — After mission leaders scrubbed the first launch attempt of NASA’s new moon rocket Monday, many are wondering when the next attempt will be.

Watch: TIMELINE: NASA scrubs launch of Artemis I due to technical issues with engine

NASA’s Space Launch System rocket is still grounded Tuesday morning after engine issues halted its planned Monday launch.

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NASA leaders are now working to figure out what went wrong and what comes next.

Photos: Thousands gather for launch of SLS rocket for Artemis I mission to the moon

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Thousands of sightseers are setup and ready to watch NASA’s launch of Artemis I.

The next possible launch window will open Friday afternoon, but it’s not clear if the rocket will be flight ready.

Until the decision to launch is made, space travel fans are on pins and needles.

Watch: Artemis 1 launch scrubbed: What happens next for NASA’s moon rocket

Channel 9 spoke with sightseers Monday who all said they have big expectations for the launch.

Most of the thousands of people at Titusville’s Parrish Park on Monday slept outside Sunday night to ensure an unobstructed front row seat of Artemis 1 blasting off, only to be disappointed.

The rocket was dealing with several issues that kept piling up.

Read: Artemis I: 9 things to know about NASA’s mission to return humans to the moon

Most notably engine No. 3, which failed to chill down using liquid hydrogen to avoid shocking the engine on liftoff.

Video: A closer look at structure of NASA’s SLS rocket Channel 9’s Rusty McCranie details the parts and materials used to build NASA’s SLS rocket. (James Tutten, WFTV.com/WFTV)

NASA officials said they are planning to give an update Tuesday evening on the status of the SLS rocket and Artemis 1 mission.

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