A dark nebula is an interstellar cloud that is so powerful it blocks the emission of light. These dark nebulas are rare occurrences, due to the complicated number of factors required for their creation. While the largest nebula formations are visible to the naked eye, pleny of dark nebula cannot be seen by a human without telescopic aid.
While all nebula are technically dark, certain nebula are called "dark nebula" because they block the light of something behind them. All nebula are dark in the sense that they do not produce light of their own, but not all have such a high level of obstruction. Thus dark nebula gain their name.
Dark nebula are often created in an explosion. In this situation, a gravitational collapse occurs from an interstellar medium, or ISM. The material collapses under its own weight, and massive stars may form with a great amount of ultraviolet radiation. From the gas emitted, dark nebula can form, creating a unique interstellar cloud in the sky that few have actually seen or ever heard of.
If the concept of dark nebula formation sounds complicated, that is because it definitely is. Dark nebula often occur as the consequence of the deaths of short-lived stars.
Supernova explosions can also lead to the creation of dark nebula. Material from this supernova explosion helps create this dark nebula material. For example, Rosette Nebula was created in this manner, and is surrounded by powerful stellar winds.
While it is often easy to stay comfortable on earth and remain satisfied in your individual life, astronomy offers a number of fascinating new experiences and objects that many people have never heard of. Dark nebula are the perfect example. Yet dark nebula formations have a huge impact on the solar system. They provide a key context clue to indicate that recently a star has formed, even if it no longer remains. And dark nebula also testify to the chaos that composes the universe.
In science it is often said that entropy, or the state of disorder, rules the day. Dark nebula exemplify this saying. For dark nebula are created from chaos, showing that beauty and chaos can come hand in hand. These dark nebula produce light, and also obstruct the light of other objects. Yet they are also fascinating to view and experience. These massive interstellar clouds send a message to humanity that individuals are small in comparison to the greatness of the wondrous universe.