Metallicity and Stellar evolution

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Difference between Metallicity and Stellar evolution

Metallicity vs. Stellar evolution

In astronomy, metallicity is used to describe the abundance of elements present in an object that are heavier than hydrogen or helium. Stellar evolution is the process by which a star changes over the course of time.

Carbon

Carbon (from carbo "coal") is a chemical element with symbol C and atomic number 6.

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Electron

The electron is a subatomic particle, symbol or, whose electric charge is negative one elementary charge.

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Galaxy formation and evolution

The study of galaxy formation and evolution is concerned with the processes that formed a heterogeneous universe from a homogeneous beginning, the formation of the first galaxies, the way galaxies change over time, and the processes that have generated the variety of structures observed in nearby galaxies.

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Helium

Helium (from lit) is a chemical element with symbol He and atomic number 2.

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Hydrogen

Hydrogen is a chemical element with symbol H and atomic number 1.

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Iron

Iron is a chemical element with symbol Fe (from ferrum) and atomic number 26.

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Nebula

A nebula (Latin for "cloud" or "fog"; pl. nebulae, nebulæ, or nebulas) is an interstellar cloud of dust, hydrogen, helium and other ionized gases.

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Neon

Neon is a chemical element with symbol Ne and atomic number 10.

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Oxygen

Oxygen is a chemical element with symbol O and atomic number 8.

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Planet

A planet is an astronomical body orbiting a star or stellar remnant that is massive enough to be rounded by its own gravity, is not massive enough to cause thermonuclear fusion, and has cleared its neighbouring region of planetesimals.

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Protostar

A protostar is a very young star that is still gathering mass from its parent molecular cloud.

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Spectroscopy

Spectroscopy is the study of the interaction between matter and electromagnetic radiation.

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Star

A star is type of astronomical object consisting of a luminous spheroid of plasma held together by its own gravity.

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Stellar classification

In astronomy, stellar classification is the classification of stars based on their spectral characteristics.

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Stellar nucleosynthesis

Stellar nucleosynthesis is the theory explaining the creation (nucleosynthesis) of chemical elements by nuclear fusion reactions between atoms within the stars.

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Stellar population

During 1944, Walter Baade categorized groups of stars within the Milky Way into bluer stars associated with the spiral arms and the general position of yellow stars near the central galactic bulge or within globular star clusters.

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Sulfur

Sulfur or sulphur is a chemical element with symbol S and atomic number 16.

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Sun

The Sun is the star at the center of the Solar System.

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Supernova

A supernova (plural: supernovae or supernovas, abbreviations: SN and SNe) is a transient astronomical event that occurs during the last stellar evolutionary stages of a star's life, either a massive star or a white dwarf, whose destruction is marked by one final, titanic explosion.

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Universe

The Universe is all of space and time and their contents, including planets, stars, galaxies, and all other forms of matter and energy.

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