The Type II Supernova That Created the Crab Nebula Was

question 21

Multiple Choice

The Type II supernova that created the Crab Nebula was seen by Chinese and Arab astronomers in the year 1054 CE..Assuming that the nebula is about 6,500 light-years from us, we know the star must have exploded approximately in the year

• A) 554 CE.
• B) 1054 CE.
• C) 1054 BCE.
• D) 5447 BCE.
• E) 7555 BCE.

---

Definitions:

Derivative Suit

A lawsuit brought by a shareholder on behalf of a corporation against a third party, often the corporation's executives or directors, due to failure in their corporate duties causing harm to the company.

Similarly Situated Shareholders

Shareholders in a corporation who are in comparable positions, typically concerning their rights and interests.

Current Shareholder

An individual or entity that currently owns shares in a company.

Derivative Action

A lawsuit brought by a corporation's shareholder(s) on behalf of the corporation against a third party, often the corporation's executives or directors, when the corporation fails to take action.