Compare the size of people with the universe

The average height of humans is less than two meters while the Earth's diameter is over 12,700km.

How is human size compared to the universe? The answer is extremely small.

Finding someone in a crowded stadium is difficult, the heart of the 7 billion people living on Earth is much more difficult.

The average height of Americans is 1.69m. If tiptoe and raise your hand, the total height from toe to finger may be about 2m. So we need 162 people to stand up in this position to reach the height equivalent to the Eiffel Tower, 324m.

The diameter of the Earth is about 12,756km, equivalent to nearly 40,000 Eiffel towers lined up.

Compared to the universe, people are just like tiny grains of sand.

People have long estimated their smallness compared to the green planet. About 2000 years ago, the size of the Earth was estimated relatively accurately by the mathematician, geographer, astronomer and also the famous Greek poet: Eratosthenes. According to many studies, his calculations were only 1-17% of the actual figures, an impressive result at that time.

The above examples only show the smallness of people before Earth. We are even smaller when compared to the Sun. Maybe we think the Sun is a giant ball of light, but it's actually quite small if placed on a scale with other stars in the universe. There are stars hundreds of times larger than this sphere.

Super blue giant Icarus, the farthest star ever observed is much larger and can light hundreds of thousands more times the Sun.

According to NASA's Night Sky Network, if the Sun is minimized by sand grains, the Solar System will be so small that it fits in the palm. At this rate, the Milky Way strip will be as big as North America, but the Milky Way is just one of billions of outer galaxies. So humans are tiny creatures that live on much larger planets, which move in the vast Solar System of the giant Milky Way, one of billions of galaxies out of space.

Humans are very small, but there are still much smaller things.

Red blood cells, one of the smallest and most abundant cells in the body, has a diameter of only 7-8 micrometers, the unit measured in 1 / 1000mm. Compared to an ordinary ant which is about 10mm long, red blood cells are extremely small, but are still particularly important for human health.

So, every time you feel small, remember that being a grain of sand in the universe can't stop you from doing something important and extraordinary.