The Astronomy

No "The" will be there, since The does not come before subjects

The aAstronomy is very important, s. Start at pasts with the Incas peoples, they haved conheciment about, had knowledge of the sun, and the moon, t. They were a dessenvovivery developed peoples.

Again, no The. No need for "at past" and after the Incas, people is not necessary. If the proper noun is given and the pronoun for it is next to it, the pronoun is useless. It is not "haved", it is "had". What is conheciment? Anyway, If there are only two objects, then "and" will join then, not a comma. After moon, there should be a period. What is dessenvovied? And "people" is already plural so no need for s.

But in the 1500 periode, they werehad died, theafed, and ended forever, because of pthe Portugueses, the, today astronomy, we are studying Martes, we went tohave already gone to the moon already, have a scientifics equipaments, and have 2 special agencies: NASA and SpaceX.

Period, not periode. It is they had died, not they were died. Unless you meant they were dead. Theafed? Spelling of Portuguese is wrong. No, The before today. We are studying because it is the present continuous tense. Marte? Did you mean Mars? The before moon, went turns into have already gone. Not scientifics, scientific. Equipment is a common noun so no s. There should be and before have.

The aAstronomy it'ss a very studied, have a field, has many job adverstisements, how astronomy teatcher, pilot of a rocket, asteroidies study, have a many olynpiads scientifics ofies, and has many scientific Olympiads in this science.

In this context, it should be it's, not is. No article before a quantifier like "many". Astronomy is not plural, so had. Wrong spelling of teacher, A before rocket. Wrong spelling of asteroid, Wrong spelling of Olympiad. Word order is jumbled.

The Astronomy

"The" is not needed in this instance.

The aAstronomy is very important, start at past with the Incas peoples, they haved conheciment about. It was first studied by the Incas. They were familiar with movements of the sun, the and moon, theyand were a dessenvovied peoplesveloped civilization.

I'm unclear on a few of the words you've used. This is my best attempt; if you want to try different words let me know.

But in the 1500 periodeth century, they were died, theafed, and endkilled, and their society eliminated forever, because of py the Portugueses, the. In today's astronomy, we are studying Marte,s, since we went to moon already,. We have a modern scientifics equipaments, haveand 2 special agencies focused on space: NASA and SpaceX.

You could also say "in the 1500s". Again, guessing a bit at the intended meaning of some of these words.

The aAstronomy it's very studied, havpopular and there are many job adverstiments, howopportunities, such as astronomy teatcher, pilot of rocket, asterodies study, havrocket pilot, and space research. There are many oOlynmpiads scientifics of this science.

I assume by "Olympiads" you mean powerful or influential? Olympiads isn't the most common term, but it does convey a strong message.