Meteorito kuŝas apud la kratero.

Esperanto has no indefinite article. So a bare noun like meteorito can mean a meteorite (or sometimes just meteorite in a general sense).

So:

• meteorito = a meteorite
• la meteorito = the meteorite

In this sentence, the lack of la makes meteorito sound indefinite: a meteorite.

La is the definite article, meaning the.

So la kratero means the crater, probably a specific crater that is already known from the context. Meanwhile, meteorito without la is indefinite: a meteorite.

This difference is very normal in Esperanto:

• Meteorito kuŝas apud kratero. = a meteorite lies beside a crater
• Meteorito kuŝas apud la kratero. = a meteorite lies beside the crater
• La meteorito kuŝas apud la kratero. = the meteorite lies beside the crater

These are basic Esperanto grammar endings:

• -o marks a noun
• -as marks a present-tense verb

So in this sentence:

• meteorito = noun
• kratero = noun
• kuŝas = present tense of kuŝi

That means kuŝas is the finite verb: lies / is lying.

Kuŝi is the dictionary form of the verb, meaning to lie.

In an actual sentence, you usually need a conjugated form. Here the sentence is in the present tense, so:

• kuŝi = to lie
• kuŝas = lies / is lying

Esperanto verb endings are very regular:

• -as = present
• -is = past
• -os = future
• -us = conditional
• -u = command / jussive
• -i = infinitive

Because kuŝi gives a more specific picture than esti.

• esti = to be
• kuŝi = to lie, to be lying, to be in a lying/resting position

So Meteorito kuŝas apud la kratero is more vivid than Meteorito estas apud la kratero. It suggests the meteorite is resting there on the ground.

Both can be grammatical, but kuŝas is more descriptive.

Because la kratero is the object of the preposition apud, not a direct object.

In Esperanto, nouns after prepositions usually do not take -n:

• apud la kratero = beside the crater
• sur la tablo = on the table
• en la domo = in the house

Also, kuŝi is an intransitive verb, so it does not take a direct object.

The accusative -n is mainly used for:

1. direct objects
2. sometimes direction toward a place

But this sentence describes location, not movement, so apud la kratero is correct.

Apud means something like beside, next to, or by the side of.

It shows nearness at the side of something. It does not necessarily mean physical contact, just close position.

It is a bit more specific than ĉe, which is a broader word meaning at, by, or near.

So:

• apud la kratero = beside / next to the crater
• ĉe la kratero = at / by the crater

No. Esperanto word order is fairly flexible, although subject–verb–other elements is the most neutral order.

The original sentence is perfectly normal:

• Meteorito kuŝas apud la kratero.

But you could also say:

• Apud la kratero kuŝas meteorito.

That might put more emphasis on the location.

You could also say:

• La meteorito kuŝas apud la kratero.

if you mean the meteorite specifically.

So the word order can change for style or emphasis, as long as the grammar stays clear.

No. Esperanto verbs do not change for person or number.

So you get:

• mi kuŝas = I lie / am lying
• vi kuŝas = you lie / are lying
• li kuŝas = he lies / is lying
• ili kuŝas = they lie / are lying

The verb ending stays -as for all of them in the present tense. That is much simpler than English.

The letter ŝ is pronounced like English sh.

So kuŝas is roughly:

• KOO-shas

A few pronunciation notes:

• u sounds like oo in food
• ŝ sounds like sh
• stress in Esperanto is always on the second-to-last syllable

So:

• kuŝas → KU-ŝas
• kratero → kra-TE-ro
• meteorito → me-te-o-RI-to

Yes. That would mean the meteorite lies beside the crater.

The difference is just whether meteorito is definite:

• Meteorito kuŝas apud la kratero. = a meteorite lies beside the crater
• La meteorito kuŝas apud la kratero. = the meteorite lies beside the crater

So both are possible, depending on context.