Learn how to say Planetary correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word planetary:
relating or belonging to a planet or planets:
a planetary system
the laws of planetary motion
relating to the earth as a planet:
planetary air pollution and climatic change
late 16th century: from late Latin planetarius ‘relating to the planets’ (recorded only as a noun meaning ‘astrologer’), from planeta ‘planet’