The Proper Motion of a Star, Its Distance, and Doppler

question 88

True/False

The proper motion of a star, its distance, and Doppler shift can give us its space velocity.

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Definitions:

Hyperopia

A vision condition where distant objects are seen more clearly than near objects because the eyeball is too short or the lens cannot become round enough.

Farsightedness

A common vision condition where distant objects can be seen clearly, but close ones do not come into proper focus.

Convex Lens

A lens that converges light rays to a point, having a curved shape that is thicker in the middle than at the edges, used to correct farsightedness.

Visual Acuity

The clarity or sharpness of vision, measured as the capability to identify letters or numbers at a standardized distance.