ansible function

Info says it keeps a low profile, so I was wondering if this can help with the enemy planets, maybe you can land on them with the ansible? Also I wonder if that rape fleet will attack you if you have one..

Isn't that the thing that let's you see if enemy ships are in the system to help you avoid entering them?

The ansible merely indicates that a system is safe or not. I am not sure how it would work in conjunction with the interferometer.

It has no purpose, i crafted it because i wanted to avoid the architect, but nope you can't, so when the architect colonize all the galaxy in one turn, it's over, ansible or not.

There no gain in knowing there is enemies in a targeted system.

The ansible (good sci-fi reference there btw) tells you if enemies are in a system or not, once they have appeared. When they do, they do not invade ALL systems, just most of them. The ansible will help you find the free ones. And even if the enemy has invaded a system, its possible that some planets there will not be occupied.
Also, the ansible, along with most/all of the other upgrade items has uses in at least one random event.
So its not useless.

I'm not sure if the ansible tell if there one planet free in a system where there is judge presence, if not it should, else it has nearly no use.

Well its a cool enders game reference regardless

It goes back further than that... Orson Scott Card is just one of many who have borrowed the name from its original creator, Ursula K. Le Guin. Its become a go-to sci-fi word for a device that allows communication over long distances with little or no delay.

The ansible tells you if a system has a hostile presence. While it may seem like minor information, being able to jump to a system that is safe gives you a better chance of not wasting fuel and finding unguarded planets. Combined with the interferometer, it can be a life saver. In any case you can disassemble if it is wasting space

Somewhat of a spoiler below.

All above posts are correct. The ansible is virtually useless until about halfway through the game when the "enemy" is discovered. It does not help you avoid discovery of the enemy. You will jump to a planet that says "Safe" and still discover the enemy. The two events are independent.

The ansible is useful after this point, however. In addition to what has already been said regarding the usefulness of the ansible, there is another instrument that gives it added utility: the interferometer.

Let's say you have the following situation: you are very nearly out of oxygen with none in the cargo hold. You are sure to lose the game if you jump to a star system with no atmospheric planets. Well, the random event might give you some, but the chances of that are low.

First, you can look using the interferometer to see all of the star systems around you. You find one with an atmospheric planet. Great! But even if you find an atmospheric planet in a star system within reach, it may be occupied by the enemy. This is where the ansible is useful. If you find a star system that both has an atmospheric planet and is not occupied by the enemy, you are nearly guaranteed to refill your oxygen stores (unless a random event pulls some BS on you when you jump).

You can use this same logic to identify locations with "safe" gas planets if you are low on fuel and don't have the Ultraprobe or "safe" rocky planets if you are in need of minerals.

Also note that the interferometer also identifies "Anomaly" along with planets. This is either a refill station or abandoned ship, which the enemy will never occupy.