Which of the Following Observations First Led Astronomers to Believe

question 12

Multiple Choice

Which of the following observations first led astronomers to believe that the Sun is located in a disk-shaped collection of stars?

• A) Stars appear uniformly scattered over the celestial sphere.
• B) The distances to Cepheid variables revealed the position of the Sun within the galaxy.
• C) The Milky Way is composed of stars and has a ring shape on the celestial sphere.
• D) Globular clusters are preferentially found in the direction of Sagittarius.

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Definitions:

RAM

Short for Random Access Memory, it's a form of computer memory that can be read and changed in any order, typically used to store working data and machine code.

Hardware

The physical components of a computer system, including the CPU, memory, and input/output devices.

Input Device

Hardware used to enter data and commands into a computer system; examples include keyboards, mice, and scanners.

Touchscreens

Input devices that allow users to interact with a computer or other devices by touching the screen directly with one or more fingers or a stylus.