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

Firefly Aerospace, which successfully landed on the moon in March, is set to go public. Space tech stocks are red hot.

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.