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Theories that imagined a companion star coexisting with the sun are called:
ASteady state
BBinary theories
CNebular theories
DBig Bang theories
Answer & Solution
Correct answer: B. Binary theories
1. They came after the wandering star idea.
2. They are the binary theories.
3. Schmidt and Weizsacker revised the nebular idea in 1950.
_Source: NCERT Class 11 Fundamentals of Physical Geography, Chapter 2, The Origin and Evolution of the Earth._
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