On the main sequence, what type will have life spans of about ten billion years?

I took Earth Science last year so although I do not have them in front of me, I believe the are in the Earth Science Reference Tables (ESRT).

To determine the type of star that will have a life span of about ten billion years on the main sequence, we can refer to both the Hertzsprung-Russell (H-R) diagram and the Earth Science Reference Tables (ESRT).

1. Start by understanding the H-R diagram, which is a plot of stellar luminosity (brightness) versus temperature. The main sequence is a diagonal band on the H-R diagram where most stars, including our Sun, spend the majority of their lives.

2. On the main sequence, the life span of a star is primarily determined by its mass. More massive stars have a shorter life span, while less massive stars can live much longer.

3. Refer to the ESRT, specifically Table 4 (ESRT IV), titled "Estimated Ages of Objects." This table provides an estimate of the age of various celestial objects. It states that the estimated age for our Sun is about 4.6 billion years, which gives us an idea of the typical life span of a star like our Sun.

4. Considering that the Sun has an estimated life span of about 10 billion years, we can infer that stars with similar mass to the Sun will have a similar life span. Therefore, stars with a mass comparable to that of the Sun, known as solar-type stars or G-type stars, will have life spans of approximately ten billion years on the main sequence.

5. It is important to note that this estimate may not be precise for all G-type stars since the life span of a star can be influenced by other factors such as metallicity (element abundance) and stellar evolution.

Keep in mind that the ESRT is a valuable resource for Earth Science, but for more accurate and detailed information, specialized astrophysics textbooks or scientific databases are usually the most reliable sources.