Words starting with planetab
Maybe these words will be useful:
- planetarian — a staff member at a planetarium.
- planetarium — an apparatus or model representing the planetary system.
- planetary — of, relating to, or resembling a planet or the planets.
- planetary nebula — an expanding shell of thin ionized gas that is ejected from and surrounds a hot, dying star of about the same mass as the sun; the gas absorbs ultraviolet radiation from the central star and reemits it as visible light by the process of fluorescence.
- planetary precession — the small component of the precession of the equinoxes contributed by the motion of the ecliptic, the change in orientation of the plane of the earth's orbit being produced by the gravitational attraction of the planets.
- planetaria — plural of planetarium.
- planetaries — plural of planetary.
- planetary transmission — A planetary transmission is a special form of geared drive in which the input and output shafts are on the same axis.
- planet — Astronomy. Also called major planet. any of the eight large heavenly bodies revolving about the sun and shining by reflected light: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, or Neptune, in the order of their proximity to the sun. Until 2006, Pluto was classified as a planet ninth in order from the sun; it has been reclassified as a dwarf planet. a similar body revolving about a star other than the sun. (formerly) a celestial body moving in the sky, as distinguished from a fixed star, applied also to the sun and moon.
- planet gear — any of the gears in an epicyclic train surrounding and engaging with the sun gear.