I think it is D
Hope this help you?!
Following are the subject and predicate in the sentence -
Simple subject - astronomers
Simple predicate - heavens constantly
Direct object - heaven
<h3>What are the parts of sentence?</h3>
- SUBJECT
- The subject, setting, or issue that is being addressed in a sentence is its concern. What or whoever the statement is about is represented by the concern.
- PREDICATE
- The sentence's movement or existence is expressed by the predicate. The simple predicate includes the verb and has the option of adding modifying words, phrases, or clauses.
- DIRECT OBJECT
- The movement of the phrase is given to the immediate item. A word or pronoun is frequently used as the direct item.
- DISTANT OBJECT
- The oblique item identifies the person or thing to whom or for whom the phrase is being moved. Oblique items frequently consist of nouns or pronouns.
- CONDITION COMPLIANCE
- A worry supplement is frequently a noun, pronoun, or adjective because it both renames and characterizes the issue.
To learn more about parts of sentence from given link
brainly.com/question/8823021
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He thinks the name is modern