(figuratively) An aim or a goal, a dependable guiding light in a quickly changing world.

A shuriken.

(astronomy) A meteor.

An actor or actress famous for appearing in pornographic films. / A person who performs sex acts in a pornographic film.

(astronomy) Polaris, the most used lodestar of the northern sky.

A navigational device which measures the angular separation of stars with reference to a known time and place in order to achieve precise navigation.

(astronomy) A large group of many stars spread over very many light-years of space; the stars are not part of any structure but are in an area of greater than average stellar density.

(astronomy) Any star whose brightness varies.

(mathematics) A geometric figure formed by connecting, with straight lines, every qth point out of p regularly spaced points that lie on the circumference of a circle.

(astronomy) A stellar system in which two stars orbit around their center of mass; double star.