alaavaruus
Alaavaruus, also known as "space," is the vast, three-dimensional expanse in which all matter, energy, and physical phenomena occur. It is not a physical substance but rather the absence of matter and energy, often referred to as a vacuum. Space is filled with various celestial bodies, including planets, stars, galaxies, and other astronomical objects.
The concept of space is fundamental to astronomy and astrophysics, as it provides the framework for understanding
Space is also a critical component of space exploration and travel. Humanity has sent numerous spacecraft and
Despite its vastness, space is not entirely empty. It contains a low density of particles, including hydrogen
In summary, space is a fundamental aspect of the universe, encompassing all matter, energy, and physical phenomena.