Planetary

Part of speech: adjective (a.)

1. Of or pertaining to the planets; as, planetary inhabitants; planetary motions; planetary year.

2. Consisting of planets; as, a planetary system.

3. Under the dominion or influence of a planet. "Skilled in the planetary hours." Drayton.

4. Caused by planets. "A planetary plague." Shak.

5. Having the nature of a planet; erratic; revolving; wandering. "Erratical and planetary life." Fuller. Planetary days, the days of the week as shared among the planets known to the ancients, each having its day. Hutton. -- Planetary nebula, a nebula exhibiting a uniform disk, like that of a planet.