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How to measure the distance from Earth to Sun and how to calculate the time taken by light to travel to Earth's surface?
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.
What else can I help you with?
Is the level of the ocean's surface used as a reference point when measuring height of depth of the earths surface?
Yes it is.
Can all 3 types of rock form on the earths surface?
i think
What type of rock can form deep below earths surface or above?
igneous
What does earths rotation cause surface in the northern hemisphere to do?
The longest season on the northern hemisphere is summer.
What are the 4 forces that cause rocks on earths surface to break down?
Water erosion
What is the distance above earths surface?
Infinity
What do we call a measure of height above earths surface?
Height above earths surface is called elevation
What is the distance from the earths surface to Earth's crust?
i hate this home work
What unit is used to measure distance outside Earths solar system?
Light years
What shows the relationship between distances on the map and the corresponding distance on the earths surface?
A map scale.
Can you measure the earths distance from the sun in light years?
it would have to be fractional the sun is not far enough
How does the scale bar help you determine distance on the earths surface?
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.
What is potential energy dependent upon an objects weight and distance from earths surface?
Gravitational potential energy.
Where do you experience more gravity on earths surface or earths center?
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.
Which force acts from a distance to play a role both in the formation of tides and mass movements on earths surface?
Gravity.
What do you project on the world to measure?
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.
What percent of the earths surface is the US?
100
