The distance from the Sun to the Earth varies about 3% over the course of a year, from a minimum or "perihelion" distance of about 91,500,000 miles to a maximum or "aphelion" distance of about 94,500,000 miles. 93 million miles is a good average figure. Details of how to measure this distance are given later.
The speed of light is approximately 186,000 miles per second, or 300,000 kilometers per second. With an average distance of 93 million miles and an approximate speed of light of 186,000 miles per second, the math becomes really easy; it takes light 500 seconds to reach the Earth.
Here's one method of how to measure the distance to the Sun, using radar technology:
(You can't use radar to measure the distance to the Sun directly
because of the nature of the Sun's surface.)
1) Wait for Earth, Venus and the Sun to line up with Venus (more or less) directly between us and the Sun.
2) Measure the distance to Venus using radar.
3) Knowing the Earth to Venus distance, use Kepler's Third Law to find the Earth to Sun distance.
(Kepler's Third Law will give the ratio of the distances of Earth and Venus from the Sun. Thus, knowing the Earth to Venus distance, you can find the Earth to Sun distance.)
See the "Related Link" below for more about measuring the distance to the Sun.
Yes it is.
i think
igneous
The longest season on the northern hemisphere is summer.
Water erosion
Infinity
Height above earths surface is called elevation
i hate this home work
Light years
A map scale.
it would have to be fractional the sun is not far enough
A scale bar on a map shows the relationship between a unit of length on the map and the corresponding distance on the Earth's surface. By measuring the length of the scale bar and comparing it to the map, you can determine the distance between two points on the Earth's surface.
Gravitational potential energy.
on the surfaceNote:Since the earth's composition is not homogeneous, the gravitational acceleration onthe surface is probably less than what it is some small distance below the surface,but it's certainly greater than at the center.
Gravity.
The maths and geometry are quite involved.Imagine the earth as a sphere and a circle imposed on the surface with the earths centre as its centre (known as a giant circle)Now imagine you can manipulate the circle from its centre until it passes through the two points you need to measure between.Then calculate the angle between the points and the centreThen calculate the length of the arc(the giant circle has a radius of 6371000 metres)measuring distance on earth then is complex, though there will probablybe some kind of calculator on the web.
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