Which technology is nasa developing that will astronauts reach mars?

NASA is developing the Orion technology that will help astronauts to reach Mars.

Explanation:

               NASA successfully tested that the Orion spacecraft launch of the abort system goes beyond the speed of the rocket and could save astronauts at launch/emergency. The test marks a new stage in the Agency's preparations for the Artemis mission to the moon, which will push astronaut missions to Mars. In generations, for the first time,  NASA is constructing a human spacecraft for long-range space missions.  

                 Hence, it is entering a new era in traveling to space. Orion will serve as a reconnaissance vehicle to transport the crew into space. It also provides emergency launch, help astronauts in missions and ensure a safe return to space.