The Hubble Law Is One of the Most Important Relations

question 70

Multiple Choice

The Hubble law is one of the most important relations in modern astronomy because it ____.

• A) allows astronomers to measure the distance to very distant galaxies using only their spectrum
• B) explains the difference in the types of galaxies seen in different directions
• C) relates the rotation curve of a galaxy to the amount of dark matter it contains
• D) connects the mass of a spiral galaxy's bulge to the size of its central black hole
• E) determines the mass of a cluster using the rotation period of the galaxies it contains

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Definitions:

Forestry

The science and craft of creating, managing, using, and conserving forests and associated resources for human and environmental benefits.

Selective Cutting

A forestry practice where only certain trees are cut down, allowing for a mix of tree ages and types to remain, promoting a healthier forest.

Uneven-aged Stand

A forestry term referring to a forest, woodland, or stand of trees that has trees of mixed ages within it, which can enhance biodiversity and resilience.

Mature Trees

Fully grown trees that have reached their full size and are often considered crucial for providing habitat and ecosystem services.