The Andromeda Spiral Galaxy Is Almost Edge-On to Us

question 139

Multiple Choice

The Andromeda spiral galaxy is almost edge-on to us. Astronomers have detected the orbital motion of this and other such galaxies' disk material by

• A) using Hubble's law.
• B) the big bang theory of 3-Kelvin radiation.
• C) the steady state theory.
• D) measuring Doppler shifts of different parts of the disk.
• E) watching the stars travel around the nucleus back to where they started.

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Definitions:

Inferential Statistics

A branch of statistics that allows us to make predictions or inferences about a population based on data collected from a sample.

Central Tendency

A statistical measure that identifies a single value as representative of an entire distribution of data, such as the mean, median, or mode.

Descriptive/Correlational Research Method

A type of non-experimental research method where researchers observe and record participants' behavior to establish relationships between variables without influencing the study's outcomes.

Conclusions Concerning Cause

Final judgments or decisions reached by reasoning, especially about why something happens or the reason for a particular effect.