给出一篇英文文章，请使用你的语言进行概括，并提取其中的主题。

以下是一篇英文文章的段落，作为输入。

NASA has picked four space companies to receive a total of $370 million of funding to help get the agency back to the moon. Elon Musk's SpaceX, Jeff Bezos' Blue Origin, and Dynetics, a subsidiary of Leidos, were awarded the agreements from the space agency, according to NASA administrator Jim Bridenstine. The funding is part of NASA's program to return American astronauts to the moon, one that's just one part of NASA's broader push towards deep space exploration.
This article discusses NASA's funding of $370 million to four space companies, including SpaceX, Blue Origin and Dynetics, to help with their plans of returning to the moon. The main theme of the article is NASA's push towards deep space exploration, with a specific focus on returning American astronauts to the moon.