A Star Is in an Elliptical Orbit Around a Black

question 23

Essay

A star is in an elliptical orbit around a black hole (which can't be seen). You have been observing the motion of the star through a telescope and have followed the motion long enough to establish that it is elliptical. How can you determine on which focus of the ellipse the black hole is located?

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Definitions:

Illicit Drug

Substances whose production, sale, or use is prohibited by law, including drugs that are subject to drug control and prohibition policies.

Narcotic

A drug or other substance affecting mood or behavior and sold for nonmedical purposes, especially an illegal one.

Amphetamines

A class of stimulant drugs that affect the central nervous system, increasing alertness, concentration, and physical energy.

Epinephrine

Also known as adrenaline, it is a hormone and medication that plays a key role in the body's fight-or-flight response by increasing blood flow to muscles, output of the heart, pupil dilation, and blood sugar.