The Center of Our Galaxy Contains a Very Intense Source

question 26

Multiple Choice

The center of our galaxy contains a very intense source of radio and X-ray radiation named Sgr A*. What is it about this source that supports the idea that the radiation comes from a black hole?

• A) The radiation is strongly blueshifted, indicating that the object is collapsing.
• B) The radiation is strongly redshifted indicating that the object is growing.
• C) The radiation is coming from an incredibly small object.
• D) Radio waves can only be produced by matter orbiting a black hole.
• E) Only radiation from a black hole could penetrate the giant molecular clouds between Sgr A* and Earth.

---

Definitions:

Short-Term Memory

The skill of maintaining a compact set of facts in an immediate, accessible state within the mind for a temporary phase.

Implicit Memory

A type of long-term memory that enables people to perform tasks without conscious awareness of these previous experiences.

Explicit Memory

A type of long-term memory involving the conscious recollection of facts and experiences, such as remembering a specific event or information.

Eidetic Memory

The rare ability to vividly recall images, sounds, or objects in memory with great precision and detail, often referred to as photographic memory.