- How many miles up is space?
- How many years did it take to build the Great Wall of China?
- What things on Earth can be seen from space?
- Why do planes fly at 35000 feet?
- How long can a plane stay in the air?
- Is the Great Wall of China the longest man made structure?
- Can you see the pyramids from space?
- What is the brightest place on Earth from space?
- Can you see lights on Earth from space?
- Can we see Earth from moon?
- Which country has the worst light pollution?
- Why don’t we see stars in space photos?
- How many people died building the Great Wall of China?
- What man made objects can be seen from the moon?
- Can planes be seen from space?
- Is Great Wall of China really visible from space?
- Can astronauts see stars in space?
- How high above the earth is the ISS?
How many miles up is space?
62 milesA common definition of space is known as the Kármán Line, an imaginary boundary 100 kilometers (62 miles) above mean sea level.
In theory, once this 100 km line is crossed, the atmosphere becomes too thin to provide enough lift for conventional aircraft to maintain flight..
How many years did it take to build the Great Wall of China?
2,000 YearsHow Long Did It Take to Build the Great Wall of China? Over 2,000 Years.
What things on Earth can be seen from space?
From the world’s biggest rivers and mountains to ancient pyramids, we look at the most incredible sights on earth that can be seen from space.The Great Pyramids of Giza, Egypt. … The Grand Canyon, USA. … The Himalayas. … Great Barrier Reef, Australia. … Amazon River. … Ganges River Delta. … Greenhouses of Almería, Spain.More items…•
Why do planes fly at 35000 feet?
The “sweet spot” of flying is regarded as between 35,000 and 42,000 feet – too high and the oxygen becomes too sparse to fuel the engines, too low and the air resistance is greater. This optimum height is linked to the usual weight of a commercial jet – that is, heavier planes fly lower, and lighter higher.
How long can a plane stay in the air?
Airlander The world’s largest aircraft which can stay airborne for up to three weeks and will be vital in delivering several tonnes of humanitarian aid has been unveiled.
Is the Great Wall of China the longest man made structure?
The Great Wall of China became a UNESCO World Heritage Site in December 1987. The wall is the longest man made structure in the world, with a total length of about 13170.7 mi or 21196.18 km. Made over the course of hundreds of years, the wall was built by over 6 different Chinese dynasties, and is over 2,300 years old.
Can you see the pyramids from space?
The size of the Great Pyramid of Giza are enormous measuring 756 ft at its base and 455 ft in height. In fact, the pyramids are so big that can be visible from space on clear days.
What is the brightest place on Earth from space?
The “Vegas Strip” of casinos and hotels—reputed to be the brightest spot on Earth—stands out in the center of this image due to both its brightness and its diversity of light colors.
Can you see lights on Earth from space?
From the window of ISS, the surface of the Earth looms large. In the daytime, you can clearly see major landforms. At night, from Earth orbit, you see the lights of Earth’s cities. … As we pass the moon – some quarter million miles (about 380,000 km) away – Earth looks like a bright ball in space.
Can we see Earth from moon?
The moon is tidally locked with Earth, meaning the moon’s orbital period matches its rotational period. It takes about a month for both the moon to orbit Earth and for the moon to rotate on its axis. … If you were camped out on the far side of the moon, you’d never have a view of Earth.
Which country has the worst light pollution?
Light pollution in Hong Kong was declared the ‘worst on the planet’ in March 2013. In June 2016, it was estimated that one third of the world’s population could no longer see the Milky Way, including 80% of Americans and 60% of Europeans. Singapore was found to be the most light-polluted country in the world.
Why don’t we see stars in space photos?
Our daytime sky is bright because of the diffusion of light through the atmosphere. … Even in space, stars are relatively dim, and simply don’t produce enough light to show up in photos set for bright sunlight.
How many people died building the Great Wall of China?
400,000 peopleWhen Emperor Qin Shi Huang ordered construction of the Great Wall around 221 B.C., the labor force that built the wall was made up largely of soldiers and convicts. It is said that as many as 400,000 people died during the wall’s construction; many of these workers were buried within the wall itself.
What man made objects can be seen from the moon?
Choose a legend: The Great Wall of China is the one of the few man-made structures visible from orbit. Or, more remarkably, it’s the only human artifact on Earth visible from the moon.
Can planes be seen from space?
An astronaut on the International Space Station took the amazing picture. We all know how small a plane can look in the sky. But if you look very closely, NASA notes, you can see the faint contrails of a plane drawing a white line across a tidal channel on the upper right. …
Is Great Wall of China really visible from space?
The Great Wall of China, frequently billed as the only man-made object visible from space, generally isn’t, at least to the unaided eye in low Earth orbit. It certainly isn’t visible from the Moon. You can, though, see a lot of other results of human activity.
Can astronauts see stars in space?
Credit: NASA/Jack Fischer. I’ve often been asked the question, “Can the astronauts on the Space Station see the stars?” Astronaut Jack Fischer provides an unequivocal answer of “yes!” with a recent post on Twitter of a timelapse he took from the ISS.
How high above the earth is the ISS?
400 kilometers240: The average distance in miles above Earth’s surface the ISS orbits (400 kilometers). On a clear day, the ISS is easily visible to the naked eye from the ground. Observers on the ground can see the station pass by overhead by tracking it using tools provided by NASA.