The Leading Explanation for the Existence of Spiral Arms Is

question 58

Multiple Choice

The leading explanation for the existence of spiral arms is

• A) shock waves from cyclic supernovae explosions.
• B) shock wave from the quasar-like eruption of the Galactic core.
• C) passages of spiral density waves through the interstellar medium.
• D) passages of massive globular clusters through the Galactic plane.
• E) tidal streams of small galaxies being torn up by our monster Galaxy.

---

Definitions:

Bar Chart

A graphical representation of data using rectangular bars to show the comparative size of various values.

Finding Stories

The process of uncovering interesting or newsworthy narratives for reporting, often requiring research, investigation, and creative thinking.

Visuals

Images, charts, and other graphical elements used to complement text or data and enhance understanding.

Line Graph

A type of graph that displays information as a series of data points connected by straight line segments, useful for showing trends over time.