At what altitude can you see the entire earth?

When in a tall building, the horizon can be as far as about 40 miles. From the ISS, the distance to the horizon is over 1,000 miles. So from horizon to horizon, the section of the Earth you can see at any one time is a patch about 2,000 miles across, almost enough to see the entire United States at once.

Why is a year on Saturn so much longer than a year on earth?

Consider Saturn, which orbits the Sun at a distance of about 9.5 AU – i.e. nine and a half times the distance between the Earth and the Sun. Because of this, the speed with which it orbits the Sun is also considerably slower. As a result, a single year on Saturn lasts an average of about twenty-nine and a half years.

What is the shape of the Earth as described by modern astronomy?

Earth is an oblate spheroid. This means it is spherical in shape, but not perfectly round. It has a slightly greater radius at the Equator, the imaginary line running horizontally around the middle of the planet. In addition to bulging in the middle, Earth’s poles are slightly flattened.

How do planes fly if the earth is spinning?

First, as the Earth itself rotates, it takes the air with it (thanks, gravity!). That includes the air through which planes fly. At the equator, the Earth spins about twice as fast as a commercial jet can fly. That rate slows the closer you get to the poles, but regardless, it’s always going to be faster than a plane.

How fast is the earth spinning?

roughly 1,000 miles per hour
The earth rotates once every 23 hours, 56 minutes and 4.09053 seconds, called the sidereal period, and its circumference is roughly 40,075 kilometers. Thus, the surface of the earth at the equator moves at a speed of 460 meters per second–or roughly 1,000 miles per hour.

How did the shape of the Earth form?

Even though our planet is a sphere, it is not a perfect sphere. Because of the force caused when Earth rotates, the North and South Poles are slightly flat. Earth’s rotation, wobbly motion and other forces are making the planet change shape very slowly, but it is still round.

Do the “proofs” that the Earth is flat actually prove it?

So in this section we will analyze the proofs they provide and try to ascertain if they actually prove the earth is flat or not. In reality some of the “proofs” that the earth is flat given by the flat earthers are not valid and some of these are outrageously and obviously incorrect.

Do skylines prove that the Earth is flat?

Consider photos of distant skylines, which are often wheeled out as “proof” that the Earth is flat. In his interactions with flat-Earth theorists, McIntyre was commonly shown a picture of Chicago, taken from Lake Michigan, in which the city’s skyscrapers are clearly visible despite being viewed from a distance of 100 km out.

What cultures believe in a flat Earth?

The belief of the flat Earth was common in ancient Greece, India, China, and a wide range of indigenous cultures. The ancient Greek conception had some similarities with that of early Egyptian thought that the Earth was a large disc surrounded a huge body of water.

What do flat-Earthers believe about space photos?

The flat-earthers believe that these photos taken from space are photo shopped. They also say that Earth’s gravity is an illusion, and that objects do not fall downward. Instead, the disc of Earth accelerates them upwards by a mystical force called ‘dark energy.’