Which of These Methods Has Provided Strong Evidence for the Existence

question 76

Multiple Choice

Which of these methods has provided strong evidence for the existence of hundreds of planetary systems around other stars?

• A) detection of very regular pulses of radio energy from some stars.
• B) spectroscopic evidence of large quantities of molecules such as ammonia and methane, which can exist only in planetary atmospheres.
• C) direct photography of actual planets near other stars.
• D) periodic wobbling of the positions and spectral line displacements of several nearby stars.

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Definitions:

Body Degeneration

The decline or deterioration of the body's tissues, organs, or functions, typically due to aging or disease processes.

Loss of Bone Density

A condition characterized by a decrease in the density of bones, making them more fragile and susceptible to fractures, often associated with osteoporosis.

Lack of Weight Bearing

A condition or scenario where an individual or limb does not apply weight or stress to a certain area, potentially affecting bone and muscle health.

Subarachnoid Hemorrhage

A form of stroke caused by bleeding into the space surrounding the brain, often leading to sudden, severe headache, loss of consciousness, or neurological deficits.