Test yourself on Universe with AI-generated multiple-choice questions, answers, and explanations.
Because Andromeda is the closest galaxy to the Milky Way.
Because Earth is a terrestrial planet with a solid surface, rather than a gas giant planet composed mostly of hydrogen and helium gas.
Because a black hole is a region in space where the gravitational force is so strong that nothing, not even light, can escape it.
Because dark energy has been confirmed by multiple observational studies to be the force behind the accelerating expansion of the universe, countering the gravitational pull of matter.