HOW DO ASTRONOMERS KNOW THE AGE OF PLANETS AND STARS? Various methods and tools are involved in stellar age estimation, an attempt to identify within reasonable degrees of confidence what the age of a star is. These methods include stellar evolutionary models, membership in a given star cluster or system, fitting the star with the standard spectral and luminosity classification system, and the presence of a protoplanetary disk, among others. Nearly all of the methods of determining age require knowledge of the mass of the star, which can be known through various methods. No individual method can provide accurate results for all types of stars.
Gyro-chronology is a method used to determine the age of field stars by measuring their rotation rate, and then comparing this rate with the rotation rate of the Sun, which serves as a precalibrated clock for this measurement. This method has been seen as a more accurate method for the determination of stellar ages than other methods for field stars.
This video used the following article under Creative Commons - CC BY-ND 4.0 DEED: "How do astronomers know the age of the planets and stars?" (theconversation.com/how-do-as...) Adam Burgasser, Professor of Astronomy & Astrophysics, University of California, San Diego (Published: October 2, 2023); slight stylistic modifications to original text.
Негізгі бет Ғылым және технология HOW DO ASTRONOMERS KNOW THE AGE OF PLANETS AND STARS?
Пікірлер: 6