What Is the Current Status of Our Search for Inhabitable,Earthlike

question 27

Multiple Choice

What is the current status of our search for inhabitable,Earthlike planets circling other stars?

• A) Several stars have been found with Earth-mass planets orbiting at a distance suitable for liquid water and life, but we cannot yet see if they have oxygen-rich atmospheres.
• B) Many extrasolar planets have been discovered, but most are in orbits with eccentricities too high to provide a stable environment for life.
• C) No extrasolar planets of any kind have yet been confirmed.
• D) We have not yet discovered Earthlike planets orbiting Sunlike stars.

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Definitions:

Negatively Sloped

Characteristic of a line or curve on a graph that moves downward from left to right, indicating an inverse relationship between two variables.

Linear

A mathematical relationship or equation that describes a straight-line graph, often used to model simple proportional relationships between variables.

Seasonally Adjusted

Data that has been modified to eliminate effects of seasonal variations to provide a clearer view of trends.

Unemployment Rate

The rate of people within the labor force who are not employed but are actively seeking jobs.