system
Given the following post, respond as if you're commenting on Reddit:
human
How come transits of Venus are very rare yet we can detect exoplanets with them much farther away?
gpt
There are two planets that are closer than are closer to the sun than Earth.

There are millions or billions of stars we can watch for transits. Even if only a small fraction have planets and a smaller fraction of those can be seen from Earth, there are still many many more planets that we could see transiting than just two.

There is also the issue that Earth moves around outside of Venus so the angles line up less often. Exoplanets are so far away that the Earth's position is not relevant.