Looking at the Earth from 100 million kilometers away
Looking back at the Earth from 100 million kilometers away, one could deeply feel how small the Earth was, like a drop in the ocean. Earth was the third terrestrial planet far from the sun, with a radius of nearly 6400 kilometers. It was the home of many creatures, including humans. At such a distance, the details of the Earth became difficult to distinguish. For example, the blue ocean, white snow, and clouds might not be visible, because the further away from the Earth, the fewer details could be seen.
The sun is 150 million kilometers away from the earth
The average distance between the sun and the earth was about 150 million kilometers. This number was mentioned in many documents. For example, documents [2] and [6] clearly state that the average distance between the Sun and the Earth is 150 million kilometers. In addition, documents [3] and [8] also mentioned the same number. Therefore, it could be determined that the average distance between the sun and the earth was 150 million kilometers.
How many kilometers away from Earth?
There was no clear and unified definition of how many kilometers away from Earth. From different perspectives, there were different situations: - From the perspective of being able to see the entire Earth, humans needed to leave the Earth at least twice the diameter of the Earth, which was about 25,484 kilometers. - From the height of the sea level, at an altitude of 118 kilometers above the sea level, the light blue planet (Earth) slowly appeared in the human line of sight. However, there might be other concepts of "leaving Earth" in astronomy and other fields, depending on the specific purpose of the research and the context. The novel "Hundred Years of Spaceship" is equally exciting. Everyone is welcome to click and read it!
Looking at the Earth from 400 kilometers above
Looking at the Earth from 400 kilometers above, one could see many unique sights. At this altitude, the astronauts on the International Space Station and the Tiangong Space Station had many wonderful observation experiences. Astronauts could see the night sky's luminous clouds, and these clouds had become brighter in recent years. They could also see the ocean reflecting the sunlight into outer space, and hundreds of kilometers of shadows appeared in the clouds in the sky. For example, when the International Space Station crossed the Earth's equator and encountered the sunrise on the ground, such a scene could be observed. There were many clouds in the northern Peninsula of Sulawesi, Indonesia. When the morning sun hit the ground at a low angle, the clouds would cast long shadows that were vertical to the day and night line. As the sun rose, the shadows would gradually shorten. From this height, Lightning was a shocking sight. Astronauts on China's space station could experience 16 sunrise sunsets every day, and they could see the magnificent scenery of their home planet. The Shenzhou 17 astronauts had taken pictures of their home planet and the vast universe at an altitude of about 400 kilometers, allowing people to feel the shocking beauty of the "cosmic level" from a space perspective.
The diameter of the earth is 12,800 kilometers
The average diameter of the Earth was about 12,742 kilometers, the diameter of the Earth's equator was about 12,756 kilometers, and the diameter between the North and South Poles was about 12,631 kilometers. Therefore, saying that the diameter of the Earth was about 12,800 kilometers was an approximate statement.
100 kilometers out of Earth?
100 kilometers away from Earth. The Earth's atmosphere extended upward to a height of more than 1600 kilometers. The Earth's atmosphere was generally divided into four main regions, from bottom to top, namely the troposphere, stratosphere, ionosphere, and outer atmosphere. The thermosphere ranged from 80km to about 500km, and 100 km was in the thermosphere of the Earth's atmosphere, which had not yet left the Earth. The novel "Hundred Years of Spaceship" is equally exciting. Everyone is welcome to click and read it!
400 kilometers in space to see the earth
Looking at Earth from 400 kilometers away, one could see many unique sights. For example, in the video taken by the Shenzhou 12 astronauts in orbit, they could see Beijing, Tianjin, Jiaodong Peninsula, Bohai Bay, the Yellow River Evacuation, the Yangtze River Evacuation, the Pacific Ocean, and many other places. They could even clearly see typhoon "fireworks". And from 400 kilometers away, astronauts could see 15 - 16 sunrise and sunsets a day. The Tiangong space station was located about 400 kilometers away from Earth. It orbited the Earth at a speed of 7.68 kilometers per second, and it circled the Earth once every one and a half hours. The average temperature 400 kilometers in space reached-270.3 degrees Celsius, close to absolute zero, in stark contrast to the warm and suitable temperature on Earth. The novel " Hundred Years of Spaceship " is equally exciting. Everyone is welcome to click and read it!
How many kilometers are there in a circle of the earth?
The circumference of the Earth was about 40076 kilometers. This number was mentioned in many documents. The Earth's equator radius was about 6378.137 kilometers, the polar radius was about 6356.752 kilometers, and the average radius was about 6371 kilometers. These data supported the conclusion that the Earth's circumference was about 40076 kilometers. Therefore, it could be determined that the circumference of the Earth was 40076 kilometers.
How many kilometers is the diameter of the earth?
The diameter of the Earth was about 12742 kilometers. However, the Earth was an irregular oval with a slightly flat pole and a slightly bulging equator. Its equator had a diameter of about 12756 kilometers, and the diameter between the North and South Poles was about 12631 kilometers.
How many kilometers is one circle of the earth?
The length of one circle of the Earth was about 40,075 kilometers. This number was based on the measurement of the Earth's equator circumference, reflecting the Earth's approximate circle. Many documents mentioned this value. Therefore, it could be determined that the length of one circle of the Earth was 40,075 kilometers.
How many kilometers is the spaceship from Earth?
Different spaceships were different kilometers away from Earth. For example, Voyager 1 was about 23.3 - 23.9 billion kilometers away from Earth; the Arctic Dawn spacecraft was 1400.7 kilometers away from Earth; the Cassini spacecraft was about 1.4 billion kilometers away from Earth; and New Vision was 4.8 billion kilometers away from Earth as of September 2019. The novel " Hundred Years of Spaceship " is equally exciting. Everyone is welcome to click and read it!