Yes. In very quick succession, right after we put the tech in place to find them.

In the mid 1990s we’d only seen a handful of exoplanets. That they were basically everywhere we looked early on clued us in to their prevalence.

We have seen 3 and one of them makes a very close pass to 2 major planets. Seems very unlikely.

If you are unaware of gravity, sure. It is accelerating towards the sun, which also happens to be where the planets are.

I urge you to take a look at how much empty space there is around the Sun.