Use this value for H o to estimate the age of the Universe. Mass is the main factor that determines the lifetime of a star. Label its axes . Main sequence ii. The Sun iii.
White dwarf stars iv.
Add to the H-R diagram a path to indicate the evolution of the Sun from protostar to white dwarf. Say as much as you can about the energy production at each phase. The above icons represent terms in the Drake equation. Describe concisely what each term represents. One of the terms, the number of stars with planetary systems, is becoming more accurately known.