NASA has only planned (and budgeted) for this single test flight before putting humans on the next flight of SLS, currently expected in 2024. That means the space agency will have to learn everything it can from this one flight and fix any kinks or concerns that arise on the ground before putting astronauts in Orion for Artemis II. 

For Artemis I, Orion will be sent on a trajectory around the far side of the moon that will carry the vehicle farther beyond our natural satellite than than any Apollo astronauts traveled, or any other spacecraft designed for humans, for that matter.  At its maximum distance from Earth it will be about 280,000 miles (450,600 kilometers) from home. 
There are no humans on this flight, but there is one ungulate and one member of many families. A plush Shaun the Sheep toy will have a swell view of the moon and Earth from Orion as part of a promotional partnership. 

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Adding to the frustration over the long development timeline for SLS is the fact that the main components of the system were taken off the shelf rather than having to be developed from scratch. The Aerojet Rocketdyne RS-25 engines that sent the Space Shuttle into orbit many times are again being pressed into service for SLS.
Adding insult to fiscal injury, Elon Musk and SpaceX are expecting to develop Starship, a more powerful system with more payload capacity that will feature reusable first-stage boosters for around billion or less. 

It’s NASA’s first big step towards Mars

The SLS was originally expected to cost US taxpayers billion, but the total spent has more than doubled to exceed billion. And that’s just for the rocket. Add the cost of developing Orion and the other components of the Artemis program to the tab and it comes to an estimated billion through the 2025 fiscal year, according to a government audit. What’s worse, expected cost per launch of SLS is looking to be about eight times what was initially expected.
The future has arrived. Be sure to keep track of all our Artemis and other NASA coverage as we head back to the moon. 

This is the only SLS test flight planned

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It will go deeper into space than Apollo 

But the full vision for Artemis involves next putting a lunar gateway in orbit around the moon. This will be a sort of waypoint and miniature space station for future lunar missions. From there the plan is to setup a permanent outpost on the lunar surface. Everything that NASA learns from Artemis is meant to then inform plans for the first missions to Mars in the 2030s. 

It’s way over budget and overdue

By now much of the world knows about the launch of NASA’s big new rocket on Monday, but the maiden launch of the long-awaited Space Launch System (SLS) and the Artemis program is interesting — and controversial — for a number of reasons. 
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Here’s our list of the seven most essential things to know about Artemis I beyond the headlines.

Ok, so this might be the one interesting detail about the SLS that’s widely known. The SLS used for Artemis I will generate about 15 percent more thrust than the Saturn V rocket that sent Apollo astronauts to the moon. The Soviet Union did build a more powerful rocket in the 1960s, but all its test flights failed.