Are there lines of disciplic succession on planets all over the universe or only on these middle planets, like Earth?

Expressions researched:
"are there lines of disciplic succession on planets all over the universe or only on these middle planets, like Earth"

Srimad-Bhagavatam Lectures

All over the universe. Nārada is moving all over the universe and creating disciples.

Lecture on SB 1.1.2 -- London, August 18, 1971:

Guest: ...successions of pure devotees of Lord Kṛṣṇa all over the universe or only on the middle planet, Earth?

Prabhupāda: Where is Revatī-nandana? What does he say? What is his question?

Revatī-nandana: The question is that are there lines of disciplic succession on planets all over the universe or only on these middle planets, like Earth?

Prabhupāda: All over the universe. Nārada is moving all over the universe and creating disciples.