When it is at the start of a sentence.
No, it shouldn't all be uppercase, and it doesn't need to be capitalized unless it is the first word in a sentence or part of a title.
Generally not unless it is the first word in a sentence.
It should only be capitalized if it is the beginning of a sentence, if is part of a proper noun, or if it is a word in the title of a book, article, movie, story, etc.
No. Equator is only capitalized when it's part of somethings titles and when it starts a sentence.
Nouns are not are not always capitalized. A common noun is a word for any person, place, or thing. A common noun is capitalized only when it is the first word in a sentence. A proper noun is the name of a specific person, place, thing, or a title. A proper noun is always capitalized.
No, astronomy is not capitalized when used in a sentence. The only time it is capitalized is when its used in a title of something.
No, it shouldn't all be uppercase, and it doesn't need to be capitalized unless it is the first word in a sentence or part of a title.
Astronomy is a long word.
No, the word forecast should not be capitalized in a sentence.
My brother is studying astronomy.
No, the word basketball is not a proper noun and so it does not get capitalized in a sentence unless it is the first word of that sentence.
I want to study astronomy later on in life.
No it shouldn't be capitalized.
No it shouldn't be capitalized.
The word "Arctic" is capitalized.
The word angels is a common plural noun. It is not capitalized unless the first word of a sentence.
Mammogram should not be capitalized unless it's the first word in the sentence.