A Key Piece of Evidence That Leads Astronomers to Conclude

question 46

Multiple Choice

A key piece of evidence that leads astronomers to conclude that most galaxies include a supermassive black hole in the center is that ____.

• A) high-speed disks of gas are observed in the central parsecs of other galaxies
• B) streamers of gas from stars that have been torn apart are detected in most galactic centers
• C) stars near the center of other galaxies are orbiting more rapidly than expected
• D) the mass of all galaxies is much more than expected based on the visible material in the galaxy
• E) the disks of all spiral galaxies rotate more quickly than Kepler's laws predict

---

Definitions:

Nutrient

Substances obtained from food that are vital for growth, metabolism, and overall body function.

Polysaccharide

A carbohydrate molecule composed of long chains of monosaccharide units bound together by glycosidic linkages.

Glycogen

A multibranched polysaccharide of glucose that serves as a form of energy storage in animals, fungi, and bacteria.

Vitamin Deficiency

A condition resulting from the lack of essential vitamins in the diet, leading to various health problems.