Final answer:
The phrase 'Two big booster rockets launch the space shuttle into orbit' represents an active noun.
Step-by-step explanation:
The question asks whether the phrase 'Two big booster rockets launch the space shuttle into orbit' is an active noun or passive noun. In this case, the phrase represents an active noun.
An active noun is a noun that performs the action in a sentence. In the given phrase, 'two big booster rockets' is the noun and it is actively launching the space shuttle into orbit.
This understanding is supported by the fact that rockets are designed to propel objects into space, which aligns with the idea of performing an action.