What Is a Cepheid Variable

question 26

Multiple Choice

What is a Cepheid variable?

• A)a bright source of variable X- ray emission, thought to harbor a supermassive black hole
• B)a main- sequence star of spectral type B5
• C)a type of galaxy that varies in its light output
• D)a type of very luminous star that makes an excellent standard candle

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Definitions:

Inner Speech

The process of talking to oneself mentally, which plays a key role in self-regulation, problem-solving, and cognitive development.

Williams Syndrome

Williams syndrome is a rare genetic disorder that causes various developmental problems, including unique facial characteristics, heart issues, and a strong verbal aptitude often paired with social extroversion.

Mental Retardation

An outdated and now considered offensive term for intellectual disability, which refers to significant limitations in intellectual functioning and adaptive behavior.

Cognitive Ability

refers to the mental capacity for processing information, solving problems, and making decisions; it encompasses functions like memory, reasoning, and understanding.