If its API gravity is greater than 10, it is lighter and floats on water; if less than 10, it is heavier and sinks. API is the American Petroleum Institute. WTI Crude API gravity of around 39.6. Brent Crude has an API gravity of around 38.06. OPEC basket of oil from 7 countries is the sourest, At present the API gravity for the Basket is heavier, at 32.7. Location: Brent Blend is a combination of crude oil from 15 different oil fields in the North Sea. It is less âlightâ and âsweetâ than WTI, but still excellent for making gasoline.
The first telescopic observation of Mars was by Galileo Galilei in 1610. Within a century, astronomers discovered distinct albedo features on the planet, including the dark patch Syrtis Major Planum and polar ice caps. They were able to determine the planet's rotation period and axial tilt.
Bottom line: British astronomer William Herschel discovered the planet Uranus â first planet to be discovered since ancient times â on March 13, 1781.The 7th planet â Uranus â was discovered on this date, completely by accident. British astronomer William Herschel was performing a survey of all the stars that were of magnitude 8 â in other words, too faint to see with the eye â or brighter.ottom line: British astronomer William Herschel discovered the planet Uranus â first planet to be discovered since ancient times â on March 13, 1781.