Have we ever wondered what space is hiding? Do we have the ability to discover and venture? Or even a desire to know...

1. Somewhere far away :Part 1

3.  Earth is the only known place in the universe where life exists.
The biosphere is just a thin film covering the surface of our
planet. Its upper border is approximately 20-22 km. Then the
area begins, interspersed with harsh rays and ultraviolet rays
- even bacteria and fungal germs do not live here. At an
altitude of 100 kilometers above sea level, the pocket line
extends - the official boundary between space and the Earth's
atmosphere.Earth is the only known place in the universe
where life exists. The biosphere is just a thin film covering the
surface of our planet. Its upper border is approximately 20-22
km. Then the area begins, interspersed with harsh rays and
ultraviolet rays - even bacteria and fungal germs do not live
here. At an altitude of one hundred kilometers above sea level,
the pocket line extends - the official boundary between space
and the Earth's atmosphere.

4.  Humanity has been studying outer space since ancient
times. At first, I simply noticed the movements of planets
and stars with the naked eye, and then came up with a
telescope, a beautiful invention suitable for these
purposes. There has been a real breakthrough in space
exploration in the last century. Making the rapid
development of rocket technology possible, the first man
was sent into orbit, accessing other celestial bodies in
our solar system, and seeing the most distant galaxies
and nebulaes. The more we learn about the universe, the
more clear it becomes that the Earth in outer space is
just a small grain of sand on the giant scale of the
universe.
https://oke.io/wTmdFV7l

6.  Outer space is a group of regions of the universe that are
located outside the atmosphere or solid shells of celestial
bodies. From the point of view of the average person.
 Space is a huge vacuum, a great nothingness that includes
planets, stars, galaxies "floating", interplanetary probes and
other moving objects. Such an image of outer space is
incorrect: although its density outside our atmosphere is
small, it is not empty. It is full of interstellar gas, dust and
various types of radiation. There is also mysterious dark
energy and matter...

7.  In fact, it's more complicated. At first, the Greek word
"Cosmos" essentially had a philosophical meaning,
indicating space around our planet. In western
European languages, based on Latin, it means
unimaginable infinity to the universe.
 In addition, this definition is on many aspects. For the
astronomer, it is associated with the movement and
interaction of celestial bodies. The physicist will talk
about the amazing properties of space, the theory of
relativity and the fluctuations that generate new
primary particles. The engineer will tell you about space
exploration problems. Counsel is mainly interested in
the legal system for the use of outer space.
https://oke.io/wTmdFV7l

8. Atmosphere and near-Earth space
 At sea level, the atmospheric pressure is 101,325 kPa,
which is one atmosphere. The vast majority of the
world's population - 99% - lives at an altitude of less
than 2 km. Above this mark, adaptive people can only be
found like Himalayan Sherpa, and the rest begins with
"mountain disease" caused by lack of oxygen. Most
(about 80%) atmospheric mass lies on a less dense
layer, located at an altitude of 7 km.
 At an altitude of 5 km, the atmospheric pressure
decreases by half, and at about 12-passes the
troposphere and stratosphere borders, over which
clouds do not rise.
 Twelve kilometers is the roof of passenger aircraft
flight, there is also short-term breathing reduction with
pure oxygen.

9.  At an altitude of 35 km there is a so-called triple point of
water - due to low atmospheric pressure, it boils at a
temperature of 0°C. 37.8 km is a standard flight height for an
aircraft with a jet engine. The record is set by the Soviet MiG-
25 M. fighter and the maximum mark that the person
climbed in the flight device is 41.42 km. This achievement is
listed in the Guinness Book of Records. At an altitude of 50
km are the stratosphere borders and starts the mesosphere.
 100 km is the pocket line, after which the space begins.
Almost at the same height is the Kennelly-Heaviside layer
reflecting radio waves. Above these limits, near-Earth space
begins, and the differences that from other regions of the
universe are due to the impact of our planet. It is expressed in
the presence and concentration of charged particles, their
energy, the impact of the Earth's magnetic field, etc. This
area of space is believed to be 10-12 radiuss. However, some
astronomers believe it extends into the moon's orbit.
https://oke.io/wTmdFV7l

10. Soon, part two...