What is the process by which a star changes over time?

Which type of galaxy has a distinct spiral shape?

What is the name given to regions in space where gravity is so strong that nothing, not even light, can escape?

What causes the seasons on Earth?

What is the final stage in the life cycle of a massive star?

Which galaxy is closest to the Milky Way?

What is the name of the supermassive black hole at the center of our galaxy?

What is the term for the path an object takes as it moves around another object in space?

What is the name of the process by which a star generates energy?

What is the most common type of galaxy in the universe?

What is the name of the theory that explains how the universe expanded from a very high-density and high-temperature state?

What is the name of the galaxy cluster that contains the Milky Way?

What is the name of the boundary around a black hole beyond which nothing can escape?

What is the name of the phenomenon where light from a distant object is stretched as the universe expands?

What is the name of the star closest to Earth?