You Observe Three Star Clusters and Construct Their Respective H-R

question 62

Essay

You observe three star clusters and construct their respective H-R diagrams.Cluster 1 has a main-sequence turnoff point at spectral type G, Cluster 2 has a turnoff point at spectral type A, and Cluster 3 has a turnoff point at spectral type B.Which cluster is the youngest and which is the oldest? Explain why.What is the approximate age of the oldest cluster?

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Definitions:

Water Table

The level below the Earth's surface where the ground is completely saturated with water, marking the boundary between the unsaturated soil above and the saturated zone below.

Permeable Rock

Rock that allows water to pass through it due to the presence of spaces, or pores, within its structure.

Unconformity

A surface of contact between two groups of unconformable strata, indicating a period of erosion or non-deposition between successive strata.

Water Table

The level below the Earth's surface where the ground is completely saturated with water, forming the upper surface of the groundwater.