There has always been a controversy about what is happening in space since the time when man turned his head to the sky and wondered what was going on in the gigantic realm above. The question ne what is in space? Ebilir can be said to be equivalent to the fact that astronomy survives astrology and exists as a science.
Over time, astronomers have made various assumptions about objects that we can see in space and cannot see. So what really is in space? Or is space that we often see as a black space really look like it?
How empty is space?
The structure and content of space have attracted scientists’ curiosity for thousands of years. Before the beginning of the 1900s, space was thought to have been filled with an invisible substance known as ether for about 2,000 years, and light waves were moving through it. However, along with electromagnetic and relativity theories, it was understood that there was no need for any medium for the advancement of light and space was uzay empty da.
Although it is the closest to the perfect “space”, space is not completely empty. In different regions of space, the level of “void,, that is, the amount of material found, is different. For example, the space between Earth and Mars, the space between the Sun and the Star (Sirius), or the space between the Milky Way and the Andromeda Galaxy, is not in the same space – or fullness.
There are about 1025 atoms per cubic meter of air at sea level in the world. In interplanetary space, within the boundaries of the Solar System, there are an average of 5 to 100 million (106-108) atoms per cubic meter. In addition, there are around 1,000 dust particles per cubic meter.
Space dust, or cosmic dust, is called material fragments in the range of several molecules and 0.1 mm. Space dust was once an element for astronomers that negatively affected their observations. It is now considered to be one of the main factors of astrophysical processes in interstellar space. For example, it is known to be one of the most important elements of the formation of stars and planets. Within the Solar System, space dust is one of the building blocks of the rings surrounding four gas giant planets, especially Saturn. The comets’ tails also form space dust. Many spacecraft used in solar system research have specially developed space dust detection and collection devices.
Most of the mass in the Milky Way is collected in stars. The rest is in the form of gas and dust spread across interstellar space. Interstellar space is more “empty arası than interplanetary space. The average density of matter in the Milky Way’s interstellar medium is, on average, one million atoms per cubic meter; ie 1 atom / cm 3. The dust density is about 100 dust particles per cubic meter. These numbers may seem very small, but gas and dust make up about 10 percent of the total material in the Milky Way. This is also called interstellar matter. The amount of matter is much less in the intergalactic space beyond the Milky Way.