Ad
related to: qualities of a gem star
Search results
Results From The WOW.Com Content Network
An asterism (from Ancient Greek ἀστήρ (astḗr) 'star' and -ism) is a star-shaped concentration of light reflected or refracted from a gemstone. It can appear when a suitable stone is cut en cabochon (i.e. shaped and polished, not faceted). A gemstone that exhibits this effect is called a star stone or asteria.
It has the Bayer designation α Geminorum, which is Latinised to Alpha Geminorum and abbreviated Alpha Gem or α Gem. With an apparent visual magnitude of 1.58, it is one of the brightest stars in the night sky. Castor appears singular to the naked eye, but it is actually a sextuple star system organized into three binary pairs.
Physical characteristics that make a colored stone valuable are color, clarity to a lesser extent (emeralds will always have a number of inclusions), cut, unusual optical phenomena within the stone such as color zoning (the uneven distribution of coloring within a gem) [23] and asteria (star effects).
Wasat is the bright star next to Jupiter. [17] Jupiter is ~280× brighter. Delta Geminorum is a subgiant star with the stellar classification F0 IV. [3] It is about 60.5 light-years (18.5 parsecs) distant. [1] This star has 1.57 times the mass of the Sun [6] and is rotating rapidly with a projected rotational velocity of 129.7 km s −1. [8]
1 Geminorum (1 Gem) is a star in the constellation Gemini. Its apparent magnitude is 4.15. In the 19th century, John Flamsteed numbered the brighter stars, by constellation, from west to east, and 1 Geminorum was the first star listed in Gemini.
Xi Geminorum (ξ Geminorum, abbreviated Xi Gem, ξ Gem), formally named Alzirr / ˈ æ l z ər /, [10] is a star in the zodiac constellation of Gemini. It forms one of the four feet of the outline demarcating the Gemini twins. [11] The star has an apparent visual magnitude of 3.35, [2] which is bright enough
Mu Geminorum or μ Geminorum, formally named Tejat (/ ˈ t iː dʒ ə t /), [14] is a single star in the northern constellation of Gemini. From parallax measurements obtained during the Hipparcos mission, it is roughly 230 light-years (71 parsecs) distant from the Sun. [1] The position of the star near the ecliptic means that it is subject to ...
Theta Geminorum (θ Gem, θ Geminorum) is a single [11] star in the northern zodiac constellation of Gemini. It is visual to the naked eye with an apparent visual magnitude of 3.59. [ 2 ] Based upon an annual parallax shift of 17.25 mas , [ 1 ] it is about 189 light years distant from the Sun .