Stellar Masses Are Measured Directly by Observations of the Motions

question 16

Multiple Choice

Stellar masses are measured directly by observations of the motions of

• A) eclipsing binary systems.
• B) visual binary systems.
• C) spectroscopic binary systems.
• D) All of the above can give us their masses.
• E) Stellar masses cannot be measured directly by any method.

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Definitions:

Residual Value

The estimated value that an asset will have at the end of its useful life, also known as salvage value.

Net Book Value

The value of an asset as recorded on the balance sheet, calculated as the original cost minus accumulated depreciation and impairments.

Straight-Line Depreciation

A method of allocating the cost of a tangible asset over its useful life in an equal annual amount.

Depreciable Cost

The cost of a fixed asset minus its salvage value, which is the total amount that can be depreciated over its useful life.