What Are the Characteristics of an Open Cluster of Stars

question 36

Multiple Choice

What are the characteristics of an open cluster of stars?

• A) Mostly found above and below the galactic plane
• B) Old age and millions of members
• C) A few hundred, mainly main sequence stars
• D) All stars are much more massive than our Sun.
• E) All stars are about the same age and luminosity.

---

Definitions:

Water

A clear, flavorless, scentless, and almost colorless substance that forms the primary part of the Earth's hydrosphere and the liquids within most living beings.

Hydrobromic Acid

A strong acid formed by dissolving the diatomic molecule hydrogen bromide (HBr) in water.

Strong Acid

An acid that completely dissociates into its ions in water, releasing all of its hydrogen atoms as hydrogen ions.