Which Idea Has Been Borne Out by Actual Astronomical Observations

question 46

Multiple Choice

Which idea has been borne out by actual astronomical observations over the past few centuries?

• A) The probability of life existing elsewhere in the universe, even elsewhere in our own solar system, is extremely great.
• B) Earth appears to occupy a unique position in the universe, unrepeated anywhere, since the Sun is unique in properties and position in a remarkable galaxy.
• C) All the observational evidence so far suggests that conditions for the evolution of life exist only on Earth in its position near the Sun.
• D) The Sun is an unremarkable star in a commonplace galaxy, and many similar stars exist in the universe around which life might evolve on planets.

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Definitions:

TCP/IP Layer

A set of protocols governing communications among all computers on the Internet. It has four abstraction layers defined by the Transmission Control Protocol and the Internet Protocol.

Ethernet

A technology for connecting devices in a wired local area network (LAN) enabling the transmission of data over a physical cable.

LAN Protocol

A set of rules and standards used for communication within a Local Area Network to ensure the smooth transmission of data.

SMTP

Simple Mail Transfer Protocol (SMTP) is a protocol used for sending emails across the Internet.