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You can see stars that are light-years away.

If you want to know the distance of the horizon, this will depend on the height of the spot where you are standing and your own height.

There's a calculator at: http://newton.ex.ac.uk/research/qsystems/people/sque/physics/horizon/

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If you look far enough away can you see Earth in the past?

No. If you look far enough away, you will see OTHER objects in the past. For example, if a galaxy is ten million light-years away, the light of this galaxy took 10 million years to reach us, so we see this galaxy 10 million years ago. Earth's light, from millions of years ago, doesn't come back to us, since (roughly speaking) light travels in a straight line, and moves at the speed of light (300,000 km/sec).


Why does light travel in straight lines give with evidence?

Yes there is. Your shadow is the simplest evidence that light travels in straight line. A solar eclipse is also evidence that light travels in straight lines, as is the fact that you cannot see around corners unless you use a mirror.


How far up on a plane do you have to be to see the horizon?

You can see the horizon from any altitude on a plane. The horizon is the line where the sky meets the earth or sea, and it appears at eye level regardless of how high up you are.


Is the distance you can see ahead?

The distance one can see ahead, known as line of sight, depends on factors like terrain, weather conditions, and visibility. On a clear day with no obstructions, a person with average eyesight can typically see objects several miles away. However, this distance can be limited by factors such as fog, rain, or obstacles in the environment.


Why isn't the green which meridian straight?

Because a straight line up and zooms right off the surface of the earth. Since the earth is a sphere (ball) only curved lines can stay on the surface. The meridian may not be a straight line, but it's the shortest possible distance between its ends, and you can prove it: The ends of the meridian are the north and south poles. Take a globe and a rubber band. When you stretch a rubber band between two points, it always follows the shortest path. Stretch the rubber band between the north and south poles of the globe. Make sure it goes across Green Which, and you'll see that it exactly follows the Prime Meridian.

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You would expect to see tracks of animals like deer, rabbits, or foxes in a straight line in the snow.


How do you see love line on hand?

a straight line which insect branches at the end and branches are parallel


Why it makees sense that a straight angle forms a straight line?

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Who is a myopic person?

A person who cannot see far of things but can see near by things..


When you ride a roller coaster what makes your body rise out of its seat at the top of hill?

When your body is traveling in a straight line it wants to continue going in a straight line, but the coaster car is not traveling in a straight line and it pulls you down. See related link.


When you ride a roller coaster what makes your body rise out of it seat at the top of a hill?

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How far is it from Cancun to Fiji?

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What is a straight line that intersects a curve?

A straight line that intersects a circle or curve at two points, but which has both end points outside the circle or curve is called a secant. A straight line that links two points on a circle or curve is called a chord. A straight line which touches a circle or curve at one point is called a tangent. A straight line that cuts a circle or curve at one point is a straight line.* For moving diagrams see Related links below this box.


How far a can a person see?

depends on the person's eyesight and the amount of visibility