In planetary nomenclature, a tholus (pl. tholi) is a small domical mountain or hill. The word is from the Greek θόλος, tholos (pl. tholoi), which means a circular building with a conical or vaulted roof. The Romans transliterated the word into the Latin tholus, which means cupola or dome. In 1973, the International Astronomical Union (IAU) adopted tholus as one of a number of official descriptor terms for topographic features on Mars and other planets and satellites. One justification for using neutral Latin or Greek descriptors was that it allowed features to be named and described before their geology or geomorphology could be determined. For example, many tholi appear to be volcanic in origin, but the term does not imply a specific geologic origin. Currently (March 2015), the IAU recognizes 56 descriptor terms. (See Planetary nomenclature.) Tholi are present on Venus, Mars, asteroid 4 Vesta and on Jupiter's moon Io.
Map of the Tharsis quadrangle showing major features, several of which are tholi. Tharsis contains many volcanoes, including Olympus Mons, the tallest known volcano in the solar system.
A tholos (pl. tholoi), from Ancient Greek θόλος), in Latin tholus (pl. tholi), is an architectural feature that was used in the classical world. It is a round structure, usually built upon a couple of steps (a podium), with a ring of columns supporting a domed roof. It has been suggested that the tholos, well provided with water and drains, was where fish were sold, although other uses for the central tholos have been suggested, such as the place where official weights and measures were held for reference or as shrines to the gods of the market place. Some macella had a water fountain or water feature in the centre of their courtyard instead of a tholos structure.
I am the toiler the old ship-slave
I stoke the fire that keep you brave
And this I gave for all mankind
to sail away on an ocean wave..
I am the voyager of the ocean grey
I wayfarer see fairway
And this I gave for all mankind
to sail away on an ocean wave..
I am the sailor - the ocean slave
Fill your sail with the breath I gave
And this I gave for all mankind
to sail away on an ocean wave..
I am the captain of the love brigade
With every breath I am your slave
And this I gave for all mankind
to sail away on an ocean wave..
..sail away on an ocean wave
..sail away on the airwaves