Usage of the word "insert"

My textbook set a test question:

Check the usage of the word "insert" in the following sentences:

1. It is his habit to insert new topics in the discussion.


2. The country is planning to insert a new satellite into the orbit.

According to the book, the answer is to use "introduce" instead of "insert" in the first sentence as it is more apt.

For me using "launch" instead of "insert" in the second sentence should be correct, as it is most often used in this way.

Am I wrong in assuming this? And is the book correct? What is more apt ?