# At what altitude can you see the entire earth?

## At what altitude can you see the entire earth?

So, if you go about one earth radius high (which is about 6370 kilometers or 3960 miles) you can see 1/2 of the most you can see. Once you go as far as the moon (roughly 400 000 kilometers away) you can see about 98.4% of one face.

### Can a hot air balloon go into space?

A helium-filled balloon can float very high up into the atmosphere, however, it cannot float up into outer space. The air in Earth’s atmosphere gets thinner the higher up you go. The balloon can only rise up until the atmosphere surrounding it has the same weight as the helium in the balloon.

How far can you see before the curve of the earth?

Earth’s curvature The Earth curves about 8 inches per mile. As a result, on a flat surface with your eyes 5 feet or so off the ground, the farthest edge that you can see is about 3 miles away.

At what altitude do you escape Earth gravity?

Wikipedia gives the escape velocity at 9,000 km above the Earth’s surface as 7.1 km/s, but as we have seen in other answers, getting to 9,000 km above the surface itself takes a lot of energy, negating the gain from the lower “absolute” speed necessary to break free of the Earth’s gravity.

## How far can you see from 10000 feet?

123 miles
The formula for determining how many miles an individual can see at higher levels is the square root of his altitude times 1.225. Thus on a clear day at 1,000 feet a person with normal vision can see 39 miles; at 10,000 feet, 123 miles; at 25,000 feet, 194 miles.

### How far can you see on open ocean?

This is the distance to the horizon, in kilometres. That’s 4.8km for a person of average height standing at sea level and looking out to sea. From five metres higher up, at the top of the beach, the horizon would be almost twice as far away.

At what altitude does zero gravity begin?

Any object that is falling freely is weightless, no matter where it happens to be. This can be the International Space Station at a height of 200 miles, a NASA reduced-gravity airplane at a height of several thousand feet, a drop tower at several hundred feet, or you jumping off a chair at 3 feet.

How big is the Earth’s groundwater?

The volume comes to about 2,551,100 mi 3 (10,633,450 km 3 ), of which 99 percent is groundwater, much of which is not accessible to humans. The diameter of this sphere is about 169.5 miles (272.8 kilometers). Do you notice the “tiny” bubble over Atlanta, Georgia? That one represents fresh water in all the lakes and rivers on the planet.

## What is the volume of the earth’s water?

Spheres representing all of Earth’s water, Earth’s liquid fresh water, and water in lakes and riv ers The largest sphere represents all of Earth’s water. Its diameter is about 860 miles (the distance from Salt Lake City, Utah, to Topeka, Kansas) and has a volume of about 332,500,000 cubic miles (mi 3) (1,386,000,000 cubic kilometers (km 3 )).

### What is the Earth like 5000 meters below the present sea levels?

Here is the Earth with sea levels 5000 meters below the present sea levels. As you can see, there is still a shallow ocean where the Pacific used to be, and some sizable inland seas in place of the Atlantic and Indian oceans. Other than that, it is mostly land; indeed, except for a few islands, it is contiguous land.

What is the largest sphere on Earth?

Detailed Description. Spheres representing all of Earth’s water, Earth’s liquid fresh water, and water in lakes and riv ers The largest sphere represents all of Earth’s water. Its diameter is about 860 miles (the distance from Salt Lake City, Utah, to Topeka, Kansas) and has a volume of about 332,500,000 cubic miles (mi 3)…