In astronomy, the sequence of changes that a star experiences throughout its existence is called stellar evolution.
For a long time it was thought that the stars were enormous balls of perpetual fire. In the 19th century, the first scientific theories about the origin of their energy appeared. They proposed that stars extracted their energy from gravity by gradually contracting. several billion years.
A black hole is a finite region of space described in Einstein's equations, whose interior has a concentration of mass high enough to generate a gravitational field such that, except for a certain type of quantum processes, no particles or radiation, nor Even light can escape from it.
In 2021, light reflections were observed in the farthest part of the black hole).2 Black holes may be capable of emitting a type of high-end radiation
Galaxies and Their Types
A galaxy is a collection of stars, gas clouds, planets, cosmic dust, dark matter and energy gravitationally bound together in a more or less defined structure. whichbattributed the origin of the Milky Way. The number of stars that make up a galaxy is enormous.
Solar System Formation
The formation and evolution of the solar system is estimated to have begun about 4.6 billion years ago with the gravitational collapse of a small part of a giant molecular cloud. Most of the collapsing mass gathered in the center, forming the Sun, while the rest flattened into a protoplanetary disk from which the planets, satellites, asteroids and other smaller bodies of the solar system were formed.
Astonomical telescope and obserbation
The astronomical telescope is a division of astronomy that is concerned with recording data about the observable universe, which is mainly concerned with calculating the measurable implications of physical models. It is the practice and study of observing celestial objects with the use of telescopes and other astronomical instruments.
As a science, the study of astronomy is somewhat hindered in that direct experiments with the properties of the distant universe this is partly compensated by the fact that astronomers have a vast number of visiblea that can be examined.