The closeout crew has now closed the side hatch, one of two hatches on the Orion crew module. The remaining hatch that the team is working to close is the Launch Abort System hatch.

This comes after the space agency confirmed that the spacesuits of all four astronauts passed their leak checks while in the Orion module, which once again tested the suits' pressure, ensuring they are airtight.

-ABC News' Briana Alvarado

With the help of their closeout crew, the Artemis II astronauts have entered the Orion crew module, which they named "Integrity."

This mission will be the first time humans travel into space on Orion.

Artemis II will be a crucial step in testing the systems on the spacecraft for future deep space missions back to the moon.

-ABC News' Briana Alvarado

The Artemis II crew has arrived at the launchpad at the Kennedy Space Center in Florida. 

NASA has said the four astronauts remain on track to launch at 6:24 p.m. ET.

The four-person Artemis II crew is heading to Launch Complex 39B at the Kennedy Space Center in Florida.

"It's a great day for us. It's a great day for the team," mission commander Reid Wiseman told a crowd of family members, fans and media after exiting the Operations and Checkout Facility.

The astronauts piled into an Astrovan to transport them across campus to the launch tower.

-ABC News' Briana Alvarado and Mary Kekatos

NASA released the first batch of high quality photos of Earth taken from the Orion capsule.

The images show the crew’s view as they look back at the pale blue dot we call home, while continuing their journey toward the moon.

According to NASA, the images were taken on Artemis II commander Reid Wiseman's "personal computing device, PC or tablet."

-ABC News' Briana Alvarado