Flyet lander nå.

Because flyet is the definite singular form of fly.

• et fly = a plane
• flyet = the plane

Norwegian usually adds the definite article to the end of the noun instead of using a separate word like the in English. Since fly is a neuter noun, the ending is -et.

The dictionary form is å lande, which means to land.

In the sentence:

• lander = lands / is landing

This is the present tense form. For many Norwegian verbs, the present tense is made by adding -r to the infinitive:

• å lande → lander

Because Norwegian often uses the simple present where English might use either simple present or present progressive.

So:

• Flyet lander nå can correspond to The plane is landing now
• literally, it looks more like The plane lands now

Norwegian usually does not need a separate verb like is to show an action in progress in a sentence like this.

Nå means now.

In this sentence, it tells you that the landing is happening at this moment. It gives the sentence an immediate, present-time feeling:

• Flyet lander = The plane is landing / lands
• Flyet lander nå = The plane is landing now

That is a very normal position for a time adverb in Norwegian.

Flyet lander nå sounds natural and straightforward. But Norwegian word order is somewhat flexible, and you can also say:

• Nå lander flyet.

That version puts more focus on now. The meaning is basically the same, but the structure changes because Norwegian follows the verb-second rule in main clauses.

Yes. That is completely correct.

Both are natural:

• Flyet lander nå.
• Nå lander flyet.

The difference is mainly focus:

• Flyet lander nå: starts with the plane
• Nå lander flyet: starts with now, so the timing is emphasized more

Notice that when nå comes first, the verb lander still has to stay in the second position, so the subject flyet comes after the verb.

Yes. In Norwegian, the present tense is often used for something happening right now.

So lander can mean:

• lands
• is landing

You do not need a special progressive form like English is landing in order to express an action in progress.

A useful learner-friendly pronunciation is roughly:

• flyet ≈ FLY-uh

A few notes:

• fly sounds somewhat like the English word flew, but with a front rounded vowel that English does not really have
• the -et ending in this word is often pronounced lightly, almost like -e
• in natural speech, flyet often sounds close to two syllables

So even though it is spelled flyet, the pronunciation is not a strong, fully separate fly-et in everyday speech.

The structure is:

• Flyet = subject
• lander = verb
• nå = adverb of time

So it follows a basic main-clause pattern:

• Subject + Verb + Time word

This is one of the most common and useful sentence patterns in Norwegian.

No. That would be incorrect.

Norwegian does not form this kind of present progressive by using er plus a verb in the same way English uses is landing.

So you should say:

• Flyet lander nå.

not:

• Flyet er lander nå.

If you want to emphasize that something is in progress, Norwegian sometimes uses other expressions, but in ordinary speech lander by itself is enough here.