Which of These Observations Was Key to Estimating the Size

question 50

Multiple Choice

Which of these observations was key to estimating the size of Sagittarius A*?

• A) an X-ray flare that faded over a few hours
• B) synchrotron radiation from the surrounding magnetic fields
• C) the Doppler shifts of stars orbiting the black hole
• D) the rate gas falls onto the black hole

---

Definitions:

Mack Sennett

An iconic American film director and producer, known as the "King of Comedy" for his pioneering work in slapstick comedy during silent film era.

Burlesque

A theatrical genre known for its humorous and provocative stage shows that combine satire, performance, and adult entertainment.

Vaudeville

A theatrical genre of variety entertainment in the United States and Canada from the early 1880s until the early 1930s, featuring a mixture of specialty acts such as burlesque comedy, song, and dance.

New Woman

A concept originating in the late 19th century that describes a woman who is independent, educated, and seeks personal and sexual autonomy.