Examlex
A black hole can be produced if the stellar core left over after a supernova is larger than 3 M⨀.
Free Lunch
An idiom expressing the idea that it is impossible to get something for nothing, disputing the possibility of receiving a benefit without providing compensation.
Economic Thinking
The analytical approach to address economic problems, considering costs and benefits in decision making.
Historical Generalizations
Broad statements derived from studying patterns and trends in history, often used to explain or predict social, political, or economic phenomena.
Statistical Data
Quantitative or qualitative information collected systematically for analysis, interpretation, and presentation for various purposes, including forecasting and decision making.
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Q83: The oldest disk stars are both _