Elements heavier than iron are primarily created through a process called nucleosynthesis in supernova explosions. These astronomical events predominantly form heavy elements through the intense heat and pressure generated during the explosion of massive stars.
Elements more massive than iron are created through processes such as supernova explosions and neutron star mergers, where extreme conditions allow for the fusion of lighter elements into heavier ones.
man-made elements that do not occur naturally in the environment. They are typically created in laboratories through nuclear reactions or particle bombardment. Examples of synthetic elements include technetium (Tc) and americium (Am).
Astronomers consider elements beyond hydrogen and helium, such as carbon, oxygen, nitrogen, and iron, as heavy elements. These elements are created through processes like nuclear fusion in stars and supernova explosions.
Rayon is a man-made fiber created from cellulose extracted from wood pulp. The primary elements in rayon are carbon, hydrogen, and oxygen.
The elements formed in particle accelerators are usually called Synthetic Elements or Artifically Produced Elements. They are all Transuranium Elements (higher on the periodic table than Uranium), and twenty have been produced so far. Most of them disintegrate within a fraction of a second, some of them in such a short time that it is difficult to verify whether an element has been created or not.
Astronomical Observatory of Capodimonte was created in 1812.
International Astronomical Union was created in 1919.
Leoncito Astronomical Complex was created in 1983.
Bangladesh Astronomical Association was created in 1988.
Brooks Astronomical Observatory was created in 1964.
Edinburgh Astronomical Institution was created in 1811.
Manchester Astronomical Society was created in 1892.
Barnard Astronomical Society was created in 1923.
Serbian Astronomical Journal was created in 1936.
British Astronomical Association was created in 1890.
Sutherland Astronomical Society was created in 1961.
Indian Astronomical Observatory was created in 2001.