I created a pgp-key with Seahorse 3.6.3. If i select the key and go to "File -> Export", i can choose between two options: An .asc-file, which exports the public key in a text format, and a .pgp-file, which creates a binary file.
I can't figure out what the binary file contains and for what it is used. Does it contain my private key? Can i give it away (because i did without understanding what i was doing)? What is it for?