There are many mysteries in space. Its sheer volume, along with the trillions of objects in the many billions of galaxies in the universe, is almost incomprehensible to the human brain. But among these, there are facts that only astronauts and almost no ordinary people know. Here are 5 of the most stunning of them! You will really like it!There are probably dead animals in Earthʼs orbitBefore humans entered space in 1961, animals were sent into space to test whether future astronauts could survive the flight, and if so, how the flight might affect their health.&nbsp;You will be surprised to know that in addition to dogs, chimpanzees, mice, cats, frogs, worms, turtles, and other animals were also sent there. Some of them returned safely, and some died during the return or landing. But some flew on ships that were never found. Therefore, most likely, these dead animals are still floating somewhere on spaceships.A planet of diamondsIt was discovered in 2004. Research by scientists at Yale University suggests that the rocky planet 55 Cancri e, which has twice the radius of Earth and eight times the mass, may have a surface composed of graphite and diamond. This planet is 40 light-years away from us, but it is visible to the naked eye in the constellation of Cancer. In 2016, scientists investigated that its "light" hemisphere is in a molten state, while the dark side, on the contrary, is solid. Recent density measurements have shown that 55 Cancri e is composed mainly not of oxygen, like the inner planets of the Solar System, but of carbon. So it would be interesting to visit the planet 55 Cancri e, at least to study its core.It is impossible to cry in spaceOf course, nobody forbids astronauts to cry, but they physically cannot do it. Because of weightlessness, tears cannot flow down, as on Earth. The formed tears have nowhere to go, so they do not fall from the eyes. They form a conglomerate around the eyeball and remain there if not removed.&nbsp;In space, astronauts grow by 5 centimetersThis is a vivid example of how microgravity affects the human body. And this can be explained by the following example: when a force acts on the spring, it is compressed. When this does not happen, it stretches. The spine can also extend up to 7.6 centimeters in space, where gravity is very weak. But when the astronauts return to Earth, their height returns to normal.Space is absolutely silentIt is hard to believe, but the fact is that sound needs an environment in which it can move and sound. And since there is no atmosphere in the cosmic vacuum, no melody can be heard there. Only complete silence.Of course, these are far from all sensational discoveries from NASA. You can learn more about them in our next articles. We are sure that on our pages you will find the most exclusive information from around the world.&nbsp;

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Sensational 5 facts about space that only astronauts can tell

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