AST-1A Lecture Notes - Lecture 1: Scientific Notation, The Moons
Document Summary
Astronomy is defined as the objects that lie beyond our planet earth and the processes by which these objects interact with one another. While evidence is strong and in large quantities that dark energy makes up the bulk of the universe, scientists have no convincing explanation for what dark energy actually is. A hypothesis must be a proposed explanation that can be tested. Astronomy is sometimes called an observational science. Must of astronomy is also a historical science. The general theory of relativity proposed by albert einstein. It led us to predict and observe, a strange new class of objects that astronomers call black holes. One important problem in describing scientific models has to do with the limitations of language. This problem is the reason scientists often prefer to describe their models using equations rather than words. Scientific notation- a system for writing large and small numbers.
