The oldest stars are classified as population III stars [See related question]
Typically irregular galaxies have the oldest stars
The oldest stars are classified as population III stars [See related question]
The oldest stars in the universe are typically red or orange in color, indicating that they are cooler in temperature. These stars are often referred to as red dwarfs and are among the first generation of stars formed in the universe.
The youngest stars are protostars which are still forming within giant molecular clouds. The oldest stars in the universe are believed to be Population II stars, which are remnants from the early universe and can be found in globular clusters.
Irregular galaxy
supernovas
The oldest stars are typically red in color. These stars are referred to as red dwarfs, and they are some of the oldest objects in the universe, dating back to the early stages of star formation. Blue stars are younger and hotter than red stars.
Population II stars are the oldest in our Milky Way. Population III stars were the first stars in the Universe, but have yet to be discovered. See related question
M-type stars, also known as red dwarfs, are the most common type of star and have the longest lifespans, estimated to live for trillions of years. Some M-type stars that are still around today are thought to have formed within the first few hundred million years after the Big Bang, making them some of the oldest stars in the universe.
Well, my friend, the sun is not actually the oldest star in the universe. There are much older stars out there that have been shining bright for billions of years. Each and every star has its own beauty and story to tell, just like the sun bringing us warmth and light every day.
The age of a galaxy is determined by studying the oldest stars within it using methods like measuring the radioactive decay of elements, analyzing the chemical composition of stars, and calculating the expansion rate of the universe. By combining these techniques, astronomers can estimate the age of galaxies in the universe.
The oldest stars are almost as old as the Universe - perhaps a bit over 13 billion years.