Approximately what core temperature is required before hydrogen fusion can begin in a star?
A) 10,000 K
B) 10 million K
C) 1 billion K
D) 10 billion K
E) 10 trillion K
Answer: B
Approximately what core temperature is required before hydrogen fusion can begin in a star?
A) 10,000 K
B) 10 million K
C) 1 billion K
D) 10 billion K
E) 10 trillion K
Answer: B