The compound noun solar system is a common noun, a word for any solar system anywhere. A proper noun is the name of a solar system, for example Epsilon Eridani which is about 10.5 light years from earth.
"Park Avenue" is a proper noun, because it is a place. Proper nouns like this should always be capitalized.
It is a proper noun, because it is the name of a specific thing.
proper
Proper noun
it's a common noun. a proper noun would be Spider-Man.
Yes, Neptune is a proper noun because it is the name of a specific planet in our solar system.
"Park Avenue" is a proper noun, because it is a place. Proper nouns like this should always be capitalized.
Yes, when it is a proper noun -- the name of a Roman god, a planet, a city in Florida, and an early US missile system. There is currently no common noun for "jupiter."
It is a proper noun, because it is the name of a specific thing.
proper
Proper noun
Pencil proper or common noun
it's a common noun. a proper noun would be Spider-Man.
Proper noun or common noun
The noun cassette is a common noun.
a common noun?
Camel is a common noun.