A spot trade is a method of trading foreign exchange currency. Spot trades, also called cash trades, are foreign exchange trades with immediate delivery. The name spot trade came to be because this type of trade is generally made on the spot.. Some countries have laws that limit how long it takes for the delivery from a spot trade to reach the purchaser, often legally limiting the time between the trade and delivery to within one or two days.
Saturn is described as having a yellowish-brown color. This is due to the presence of trace amounts of ammonia, hydrocarbons, water vapor and phosphine in its atmosphere.
[See also: Dione: Saturn's Turned-Around Moon, Hyperion: Saturn's Spongy Moon, Mimas: Saturn's Death Star Moon, Rhea: Saturn's Dirty Snowball Moonand Tethys: Saturn's Icy Moon] Saturn's rings. Galileo Galilei was the first to see Saturn's rings in 1610, although from his telescope they resembled handles or arms. It took Dutch astronomer Christiaan Huygens, who had a more powerful telescope, to propose that Saturn had a thin, flat ring. Astronomers with even more powerful telescopes discovered that Saturn actually has many rings made of billions of particles of ice and rock, ranging in size from a grain of sugar to the size of a house. The largest ring spans up to 7,000 times the ...