Question

the sun is a star . everybody knows that use noun clause​

Answer 1

Answer:

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Answer 2

Answer:

That the Sun is a star is known to all

Explanation:

A subordinate/dependent clause is a clause which cannot stand on its own as a whole sentence; it merely complements the sentence's main clause, thus adding to the whole sentence's meaning

In the above case we are converting a compound sentence to a complex sentence using a noun clause. A Noun Clause is a dependent/subordinate clause that does the work of a noun in the complex sentence.

That the Sun is a star is a dependent/subordinate noun clause as it behaves as a noun.