Brain › Science & NatureWhat lies at the center of our galaxy?A wormholeA black holeA supernovaA quasarAnswerThe correct answer is B) A black hole.More Science & Nature questionsHow many planets make up our Solar System?Human cells typically have how many copies of each gene?What is the standard SI unit for temperature?The human heart has how many chambers?What is the hottest planet in the Solar System?What is the "powerhouse" of the Eukaryotic animal cell?Play Brain · Practice