Process of Science: Evidence for Dark Matter in Galaxy Clusters

question 56

Essay

Process of Science: Evidence for dark matter in galaxy clusters can be seen in observations of the motions of individual galaxies,X-ray observations of hot intra-cluster gas,and gravitational lensing.What is different about lensing that further strengthens the case that dark matter really does exist.

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Definitions:

Rent Revenue

Income earned from leasing out property or equipment to another party, reported as part of the operating income in the profit and loss statement.

Accrued Expense

An accounting record of an expense that has been incurred but not yet paid, representing a company's obligation to make future payments for goods and services received.

Incurred

Refers to the recognition of expenses or liabilities that have been consumed or acquired in the course of business operations.

Accrued Expense

Expenses that have been incurred but not yet paid for, recognized in the financial statements through adjusting entries.