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Yes, Eratosthenes estimated the Earth's diameter using the angle of the sun's rays at two different locations on the same day. By measuring the difference in the angles, he was able to calculate the Earth's circumference and thus its diameter.

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1y ago

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Related Questions

Who was the first to discover the earth's diameter?

Eratosthenes


Is the greek eratosthenes known for his calculation of the earths weight?

False


What did Eratosthenes determine?

He postulated the circumference of the earth.


What are the planet's diameters?

Mercury's diameter (at the equator) = 4880km or 0.3825 x Earths diameter Venus' diameter = 12,104km or 0.9488 x Earths Earth's diameter = 12,756km Mars' diameter = 6794km or 0.5323 x Earths Jupiter's diameter = 142,984km or 11.21 x Earths Saturn's diameter = 120,534km or 9.45 x Earths Uranus' diameter = 51,114km or 4.01 x Earths Neptune's diameter = 49,532km or 3.88 x Earths (Pluto's diameter = 2306km or 0.18 x Earths) I included Pluto on the end there, its not classed as a planet any more though, but a dwarf planet.


Who made the first attempt to determine the size of the earth?

Eratosthenes


What is the percentage of the earths diameter from the moons diameter?

90/


How big are the planets from largest to smallest?

From smallest (1) to largest (8) 1 Mercury. Diameter (at the equator) = 4880km or 0.3825 x Earths diameter 2 Mars. Diameter = 6794km or 0.5323 x Earths 3 Venus. Diameter = 12104km or 0.9488 x Earths 4 Earth. Diameter = 12756km 5 Neptune. Diameter = 49,532km or 3.88 x Earths 6 Uranus. Diameter = 51,114km or 4.01 x Earths 7 Saturn. Diameter = 120,534km or 9.45 x Earths 8 Jupiter. Diameter = 142,984km or 11.21 x Earths


How many earths fit in inside the earths diameter?

One.


How do the inner planets compare in size?

Mercury's diameter (at the equator) = 4880km or 0.3825 x Earths diameter Venus' diameter = 12104km or 0.9488 x Earths Earth's diameter = 12756km Mars' diameter = 6794km or 0.5323 x Earths The inner planets are all much smaller than the outer gas planets; Jupiter's diameter = 142,984km or 11.21 x Earths Saturn's diameter = 120,534km or 9.45 x Earths Uranus' diameter = 51,114km or 4.01 x Earths Neptune's diameter = 49,532km or 3.88 x Earths


Why can a chord be a diameter?

because the chord can be determine by the diameter and the diameter can be determine by the chord.


What is shape and size of the planets?

Planets, by definition are all approximately spherical in shape, though their axial rotation often means that they are oblate spheroids (look like `squashed spheres`, longer across the equator than from pole to pole). The size of the planets varies; Mercury's diameter (at the equator) = 4880km or 0.3825 x Earths diameter Venus' diameter = 12104km or 0.9488 x Earths Earth's diameter = 12756km Mars' diameter = 6794km or 0.5323 x Earths Jupiter's diameter = 142,984km or 11.21 x Earths Saturn's diameter = 120,534km or 9.45 x Earths Uranus' diameter = 51,114km or 4.01 x Earths Neptune's diameter = 49,532km or 3.88 x Earths


Compared to earths diameter the suns diameter is about?

110 times greater..