AST 105 - Study guides, Class notes & Summaries

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Exam (elaborations)

AST 105 Quiz with Answers Rated A
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February 2026

2025/2026

A+
The following figures show various stages during the life of a star with the same mass as the Sun. Rank the stages based on when they occur, from first to last. - -first to last protostar main sequence g star red giant planetary nebula white dwarf Assume that all four H-R diagrams below represent a star in different stages of its life, after it starts to fuse hydrogen in its core. Rank the HR diagrams based on when each stage occurs, from first to last. - -star in the sequence a li...
MERCYTRISHIA
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Exam (elaborations)

AST 105 Exam 2 Ch 14 Last-Minute Lifesaver – Practice Exams & Answers
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May 2025

2024/2025

A+
AST 105 Exam 2 Last-Minute Lifesaver – Practice Exams & Answers
StudyMastermind
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Exam (elaborations)

Ast-105 Exam 1 Question and answer 100% correct 2023
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June 2023

2022/2023

A+
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Ast-105 Exam 1 Question and answer 100% correct 20231 astronomical unit (AU) = 150,000,000 km = average distance between Earth & Sun 1 light year (ly) = 9,500,000,000,000 km = distance light travels in a year Earth rocky planet with iron core Sun typical star - ball of hot gas, mostly hydrogen & helium. 100x larger in diameter than Earth Earth-Sun distance 1 AU Milky Way Galaxy about 100,000 ly across, contains about 100 billion stars Scienti...
flyhigher329
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