The Trump administration has already developed a plan to cut about $6 billion from NASA's budget while allocating the remaining funds to a Mars-focused plan, which matches the ambitions held by Elon Musk and his Rocket Maker Spacex.

The discretionary budget copy posted on NASA's website on Friday said the change focused on NASA's funding "beat China back to the moon and hit the first man to Mars."

NASA also said it would need to “simplify” its workforce, information technology services, NASA center operations, facility maintenance, and building and environmental compliance activities, and terminate multiple “unaffordable” tasks while reducing scientific tasks for “financial responsibility.”

NASA's agent administrator Janet Petro said in an email to an agency on Friday that the proposed lean budget would cut 25% of the space agency's funding, "reflecting the government's support for our mission and laying the foundation for our next great achievement."

The memo obtained by CNBC said PETRO urged NASA employees to "persevere, stay resilient and tend to do things that have never been done before, especially in a constrained environment." She acknowledged that the budget would "require difficult choices" and that some NASA "will be lowered in activities."

Documents on NASA's website said it will allocate more than $7 billion in funding for lunar exploration and "launched a new $1 billion investment for a Mars-centric program."

SpaceX is already one of NASA's largest Department of Defense and Department of Defense contractors and has long been seeking to launch manned missions to Mars. The company said on its website that its massive Starship rocket is designed to "moving crew and cargo to Earth's orbit, the moon, Mars and beyond."

Musk, the founder and CEO of SpaceX, plays a central role in President Donald Trump’s administration, working to cut the size, spending and capacity of the federal government and influence regulatory changes through the Department of Government Efficiency (DOGE).

Musk often makes aggressive and incorrect predictions about the company, and he said in 2020 that he was "very confident" that SpaceX will land humans on Mars in 2026.

Petro stressed in her memo that under the discretionary budget, NASA will retire the SLS (Space Launch System) rocket, Orion spacecraft and gateway programs.

According to NASA's Jet Propulsion Laboratory's website, it will end its Green Aviation Spend and Mars Sample Return Program (MSR) program, which attempts to use rocket and robotic systems to "collect and send samples of Martian rock, soil and atmosphere for detailed chemical and physical analysis."

If the budget is approved, the biggest reduction will be on NASA, which will hit the Space Agency's Space Science, Earth Science and Mission Support Division.

PETRO does not name any specific aerospace and defense contractors in its scope emails. However, in the absence of SLS, the Blue Origin of SpaceX, Ula and Jeff Bezos will continue to launch. Boeing Currently is the main contractor leading the SLS program.

"This is far from the first time that NASA is required to adapt, and the ability to deliver even under pressure makes NASA unique."

President Trump's nominee leads NASA, tech entrepreneur Jared Isaacman, who still has to get approval from the U.S. Senate. His nomination withdrew from the Senate Commerce Committee on Wednesday.

watch: CNBC interviews NASA astronauts in space