Kepler Found the Orbits of Planets Are Ellipses, Not Circles

question 67

True/False

Kepler found the orbits of planets are ellipses, not circles.

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Definitions:

Retinoscope

An instrument used by eye doctors to shine a light into the patient's eye to observe the reflection from the retina, helping to determine the patient's prescription for glasses or contact lenses.

Ophthalmoscope

A hand-held instrument with a light; used to view inner eye structures.

Slitlamp

A microscope combined with a bright light used to examine the eye's anterior and posterior segments, aiding in detecting eye diseases.

Refractometer

A refractometer is an instrument used to measure the extent of light refraction in liquids or gases, often utilized in the analysis of fluid properties.