Are there intergalactic planets?

Answer 1

It seems likely that there are, but I suspect that they would be quite difficult to detect.

The Virgo cluster of 2500 galaxies is thought to contain about one trillion intergalactic 'rogue' stars; it seems likely that at least some of them have planets, though I would imagine they would be very difficult to detect.

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Answer 2

Ian Aitchison

No, planets within a galaxy are referred to as interstellar, not intergalactic. Intergalactic space primarily contains galaxies, not individual planets.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.