Special & General Relativity Questions and Answers
What is curved space-time?
Physically, curvature just represents a change in the strength of a gravitational field produced by either mass of energy that is located in some particular location in space, and at some particular instant in time.
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All answers are provided by Dr. Sten Odenwald (Raytheon STX) for the NASA Astronomy Cafe, part of the NASA Education and Public Outreach program.