Sagot :
Answer:
Outer space is not completely empty—it is a hard vacuum containing a low density of particles, predominantly a plasma of hydrogen and helium, as well as electromagnetic radiation, magnetic fields, neutrinos, dust, and cosmic rays.
Answer:
On what is cosmic and sidereal space, it can be understood that sidereal space is considered all the space existing in the universe that is not occupied by celestial bodies and their respective atmospheres.
Cosmic space is considered the universe in its entirety, that is, Cosmos means everything that exists in the universe from the macrocosm to the micro cosmos, ranging from atoms to planets, solar systems, galaxies, etc. .
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