It is a rather small fraction of a light year. A light year is about 9,460,730,472,580.80 km. The fraction of a light year that your number represents is roughly 5.9 divided by 9,461.
The answer is not a simple one, because it depends on the criteria used.
As you move upward from the surface, gravity and the density of air gradually decrease until you reach a near-vacuum. Listed below are some valid interpretations of the boundary between Earth and space.
For starters, astronauts can say they've been to space after passing only the 50-mile mark (80 kilometers, 264,000 feet). NASA awards its astronaut wings to any individual reaching that altitude.
Meanwhile the boundary recognized by many in the space industry is the Karman line at a somewhat arbitrary 62.137 miles (100 kilometers). Scientist Theodore von Kármán long ago calculated that at this altitude the atmosphere is so thin that it's negligible, and conventional aircraft can no longer function because they can't go fast enough to get any kind of aerodynamic lift. This 62-mile (100 km) boundary is accepted by the Federation Aeronautique Internationale (FAI), which sets aeronautical standards.
Recently, with data from a new instrument developed by scientists at the University of Calgary, scientists defined that space begins 73 miles (118 kilometers) above Earth's surface. NASA's mission control uses 76 miles (122 kilometers) as their re-entry altitude because below that the shuttle switches from steering with thrusters to maneuvering with aerodynamic surfaces. Others point out that the "Now Entering Space" sign should be posted way out at 13 million miles (21 million kilometers) because that's the boundary where Earth's gravity is no longer dominant.
Meteorologists will tell you the atmosphere ends 600 miles (1000 kilometers) up, but even at half that distance air molecules are few and far between. Meteors start to burn about 40 miles (65 kilometers) up due to atmospheric friction. The drop in atmospheric density is obvious even lower. Most humans need supplemental oxygen above a mere 10,000 feet (3 kilometers) and the highest habitations have been near 16,000 feet (5 kilometers).
The composition of the atmosphere is changing today as it has been changing since the earth began to cool and atmosphere formed, just as the climate has gone through periods of heating and cooling. There have been multiple "ice ages", and multiple thawings. Ocean levels have gone up and down. Carbon dioxide has been absorbed by plants and buried for centuries, and carbon dioxide levels have gone back up following volcanic eruptions.
Lately, (in the last hundred years) the levels of carbon dioxide has gone up. Scientists believe that pollution from human activity is changing the atmosphere.
- Burning of fossil fuels (coal, oil and natural gas) in industry, transport and the generation of electricity, which releases carbon dioxide (CO2).
- Bad agricultural practices emit methane (CH4), a powerful greenhouse gas.
- Deforestation has removed the trees that used to take carbon dioxide from the atmosphere.
There are two main beliefs about this. One, that a God (or gods) created it. Another one, that the Universe arose spontaneously, because of the way nature's laws work.If you specifically want to know the belief of a particular religion, ask a more specific question.
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