What it is: A swap is an agreement between two parties to exchange a series of future cash flows. How it works (Example): Swaps are financial agreements to exchange cash flows. Swaps can be based on interest rates, stock indices, foreign currency exchange rates and even commodities prices.
Neptune was discovered in the fall of 1846. What is Neptune's nickname, 'Last of the Gas Giants. Neptune had gone through several name changes from LeVerrier's Planet to Janus to Oceanus, and then finally Neptune in 1846. It is also called, the watery planet. The planet has several nicknames, including: The Blue Planet.
Neptune is a giant planet. But it is not a gas giant like Jupiter or Saturn, it is an ice giant. Uranus and Neptune are called so because they are made from volatile chemical compounds which are heavier than Hydrogen and Helium and with freezing point greater than 100K. These substances are called ices. Some examples are water, ammonia and methane.