Given That White Dwarf Supernovae Are Such Good Standard Candles,why

question 86

Multiple Choice

Given that white dwarf supernovae are such good standard candles,why don't we use them to measure the distance to all galaxies?

• A)They are rare events,so we have observed them in only a tiny fraction of all galaxies.
• B)We cannot see them beyond a distance of about 100 million light-years.
• C)They can occur only in spiral galaxies,not elliptical galaxies.
• D)We would,but we don't have enough telescopes.

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Definitions:

Endocrine Gland

Glands of the endocrine system that release hormones directly into the bloodstream, regulating various body functions.

Posterior Lobe

Refers to the back portion of an organ or gland, such as the posterior lobe of the pituitary gland in the brain.

True Endocrine Gland

A gland that secretes hormones directly into the bloodstream to regulate various bodily functions, without using a duct.

Hypothalamus

A region of the brain below the thalamus; it coordinates both autonomic nervous system and the activity of the pituitary, controlling body temperature, thirst, hunger, and other homeostatic systems.