Jeff Bezos, founder of Blue Origin, inspects New Shepard's West Texas launch facility before the rocket's maiden voyage.

More than four decades after the last man walked on the lunar surface, several upstart space entrepreneurs are looking to capitalize on NASA's renewed interest in returning to the moon, offering a variety of proposals with the ultimate goal of establishing a lasting human presence there.

The commercial sector's interest comes as many anticipate support from the Trump administration, which is eager for a first-term triumph to rally the nation the way the Apollo flights did in the late 1960s and early 1970s.

The latest to offer a proposal is Jeffrey P. Bezos, whose space company Blue Origin has been circulating a seven-page white paper to NASA leadership and President Trump's transition team about the company's interest in developing a lunar spacecraft with a lander that would touch down near a crater at the south pole where there is water and nearly continuous sunlight for solar energy. The memo urges the space agency to back an Amazon-like shipment service for the moon that would deliver gear for experiments, cargo and habitats by mid-2020, helping to enable "future human settlement" of the moon. (Bezos, the founder of Amazon.com, owns The Washington Post.)

"It is time for America to return to the Moon — this time to stay," Bezos said in response to emailed questions from The Post. "A permanently inhabited lunar settlement is a difficult and worthy objective. I sense a lot of people are excited about this."

The Post obtained a copy of the white paper, marked "proprietary and confidential," and the company then confirmed its authenticity and agreed to answer questions about it.