Population I
Hello, you have come here looking for the meaning of the word Population I. In DICTIOUS you will not only get to know all the dictionary meanings for the word Population I, but we will also tell you about its etymology, its characteristics and you will know how to say Population I in singular and plural. Everything you need to know about the word Population I you have here. The definition of the word Population I will help you to be more precise and correct when speaking or writing your texts. Knowing the definition ofPopulation I, as well as those of other words, enriches your vocabulary and provides you with more and better linguistic resources.
English
Alternative forms
Etymology
Proposed by astronomer Walter Baade in 1944.
Proper noun
- (astrophysics, usually attributively) A population or group of stars formed relatively late in the history of the Universe, characterized by having a high metallicity.
- Coordinate terms: Population II, Population III
- 2019 December 11, Brian Koberlein, “The Stars In Our Galaxy Are More Varied Than We Thought”, in Forbes, archived from the original on 2022-09-15:
- We generally place stars into one of three populations based on their metallicity. Population I stars like the Sun are metal heavy. They are younger stars and tend to be found in the spiral arms of the Milky Way.
- 2021 May 21, Tom Metcalfe, “An ancient star casts new light on the birth of the universe”, in NBC News, archived from the original on 2022-07-06:
- Most stars, such as the sun, are third-generation "Population I" stars that contain relatively heavy elements such as iron, nickel, carbon and oxygen.
- 2022 December 6, Jonathan O'Callaghan, “Astronomers Grapple with JWST’s Discovery of Early Galaxies”, in Scientific American, archived from the original on 2022-12-09:
- The brightness of these galaxies could be attributed to such stars, which would be much hotter and brighter than subsequent Population II stars and Population I stars, such as our sun, both of which fill our modern-day universe.
Derived terms
- Pop I (abbreviation)