Andromeda, Cassiopeia, the Milky Way, the solar wind - what beautiful and unearthly words, they are literally shrouded in mystery. Space around us, our planet is a very small part of the universe, of which we know practically nothing. Black abyss filled with hot stars hanging in the icy void, fraught with a lot of unknown and mysterious things. What do people today about these mysteries titanic scale?
1st place: The Galactic cannibalism
Just like in life on earth, in space, some "special" quietly devour others. No exception and galaxies. For example, a neighbor of the Milky Way - Andromeda is now devouring their smaller neighbors. Inside, more than a dozen disparate Andromeda star clusters - the remnants of past feasts.
In the picture - the simulation of collision of our home galaxy and Andromeda, which happens after only 3 billion years:
2nd place: Quasars
These super-bright beacons are looking at us from the edges of the visible universe, the earth and remind scientists of the chaotic and turbulent childhood of our universe. Quasars emit energy that is greater than the energy of hundreds of galaxies combined. Argued that the quasars - a giant black holes at the centers of distant galaxies.
In the picture - the quasar 3C 273, photographed in 1979:
3rd place: Dark matter
Experts suspect the existence of huge accumulations of matter in the universe, although, to date, these clusters neither see nor fix failed. More of our little bit poor technical equipment, however. In astronomical terms, of course. Such clusters may consist, according to numerous assumptions, of anything - from light neutrinos to invisible black holes. But some of the scholars said that dark matter and did not happen, and to explain the anomaly, so we call it, will help better understanding of the aspects of gravity.
In the picture - a fantasy on the theme of dark matter:
4th place: Gravitational waves
The distortion of space-time continuum are called gravitational waves. This phenomenon was predicted by Albert Einstein in his general theory of relativity. These waves move at the speed of light and is so elusive that even such giant special laser-interferometric gravitational-wave observatory as LIGO and LISA, capture only those waves that are formed as a result of any changes in the enormous space. For example, the merger of two black holes is shown below:
5th place: The vacuum energy
As it turned out, in the vacuum of space is not so empty as it seems. Quantum physics states that interstellar space is literally packed with virtual subatomic particles that are continuously broken down and appear again. These particles are filled every corner of the space of some anti-gravitational energy of the order and make space to move. Although no one has so far failed to explain where the universe is moving and why it is needed.
In the picture it, the universe ...