1.
Ptolemy's Table of Chords
Although certainly not the first trigonometric table1, Ptolemy's On the Size of Chords Inscribed in a Circle (2nd Century AD) is by far the most famous. ...
2.
Diameter of the Moon's Orbit
"However, the distance between the Earth and Moon varies from 356410 km (222756 ... The moon's distance from the Earth varies from 360000 km to 406000 km, ...
3.
Thickness of Earth's Atmosphere
The Earth's atmosphere consists of four layers. The first layer is the troposphere where the temperature decreases with increasing height. ...
4.
Temperature on Earth
"The average surface temperature of Earth is about 15 °C (59 °F). ... The effect of an increase in earth's average temperature will be expected to melt ...
5.
Number of Cars
"There are over 600 million motor vehicles in the world today. If present trends continue, the number of cars on Earth will double in the next 30 years. ...
6.
Density
the average density of the entire earth; the percent of the earth's mass located in the mantle, and; the average density of the core. Solutions … ...
7.
Temperature at the Center of the Earth
Earth's Core Temperature. Byrdand Black, 1996. "Earth's core temperature is estimated at around 5000 to 7000 degrees Celsius." 5300–7300 K ...
8.
Temperature at the Center of the Earth
Earth's Core Temperature. Byrdand Black, 1996. "Earth's core temperature is estimated at around 5000 to 7000 degrees Celsius." 5300–7300 K ...
9.
Diameter of Earth
earth. Infoplease.com. "The equatorial diameter is c.7926 mi (12760 km) and the polar diameter 7900 mi (12720 km)", 12760 km 12720 km ...
10.
Diameter of the Sun
May 20, 2004 ... "The diameter of the Sun is about 1390000 km. The average diameter of the Earth is 12740 km. About 109 Earths could be placed side-by-side ...
