NASA has finished stacking the twin solid rocket boosters for its Artemis III mission inside the Vehicle Assembly Building at Kennedy Space Center in Florida, The Florida Press reported, and NASA confirmed the milestone in a status update Tuesday.

Engineers added nose cones to both boosters on Sept. 30 to complete the work on the Space Launch System, or SLS, rocket, The Florida Press said.

All four RS-25 engines are now installed on the rocket's core stage, NASA said. Engine installation began Aug. 24, The Florida Press reported. In the coming weeks, the core stage will be joined to the boosters, NASA said.

NASA plans to roll a "short stack" version of the rocket to Launch Pad 39B in the coming months for a fueling test, NASA said. The launch team will practice loading propellant during the test, NASA said.

Stacking began in July, when the first pair of bottom segments was placed on the mobile launcher on July 13, it said.

Artemis III is targeted for no earlier than June 2027, NASASpaceflight reported. It will carry a crew of four in the Orion spacecraft, but it will not go to the moon. Instead, it will test the lunar landers alongside Orion, NASASpaceflight said.

Work is also moving ahead at NASA's Marshall Space Flight Center in Alabama, where teams are building a spacer that will fly in place of the rocket's upper stage, both NASASpaceflight and NASA said. NASA said the main structure of the spacer is now complete.

At the launch pad, teams are fixing a flame deflector that had minor damage from the Artemis II launch, NASA said.

What we know: NASA has finished stacking the Artemis III boosters.
What we don't: The exact date of the fueling test at the launch pad.