The Center of the Milky Way Was an Active Galactic

question 21

Multiple Choice

The center of the Milky Way was an active galactic nucleus in the past.What direct observational evidence supports this?

• A) gamma-ray bubbles extending thousands of light-years above and below the galactic plane
• B) rapid motions of stars near the galactic center
• C) X-ray emission near the galactic center
• D) All of the above.

---

Definitions:

Eyedrops

A liquid medication administered into the eye to treat various conditions or provide lubrication.

Cornea

The transparent front part of the eye that covers the iris, pupil, and anterior chamber, responsible for focusing most of the light entering the eye.

Eyedropper Position

The correct way to hold and use an eyedropper for administering medication directly into the eye.

Aspiration Risk

The potential danger of inhaling food, liquid, or foreign objects into the lungs, which can cause choking or respiratory complications.