Another space stock is going public. But this isn't just any old space stock -- this one already landed on the moon.

Northrop Grumman-backed Firefly Aerospace raised the proposed price range for its U.S. initial public offering on Monday and is now targeting a valuation of up to $6.04 billion in its U.S. listing, underscoring investor interest in space-related ventures.

The latest valuation comes after the company, which manufactures lunar landers and rockets, said in a regulatory filing that it expects to price shares in its IPO between $41 and $43 apiece. The price range values Firefly Aerospace at $6 billion and will raise nearly $700 million for the company at the top end of the range.