Which term denotes any of the very large groups of stars and associated matter found throughout the universe?

Which term denotes any of the very large groups of stars and associated matter found throughout the universe?

• A. Galaxy
• B. Nebula
• C. Comet
• D. Asteroid

Answer: (A)

A galaxy is a vast, gravitationally bound system that contains stars, gas, and dust, spanning enormous distances and housing billions to trillions of stars. This matches the description of very large groups of stars and associated matter found throughout the universe. Nebulae are large clouds of gas and dust, often where stars form, but they are not bound systems of many stars. Comets are small icy bodies orbiting the Sun, and asteroids are rocky or metallic fragments—both are much smaller and not the massive stellar assemblies described here. So the term that denotes those enormous collections is galaxy.

A galaxy is a vast, gravitationally bound system that contains stars, gas, and dust, spanning enormous distances and housing billions to trillions of stars. This matches the description of very large groups of stars and associated matter found throughout the universe. Nebulae are large clouds of gas and dust, often where stars form, but they are not bound systems of many stars. Comets are small icy bodies orbiting the Sun, and asteroids are rocky or metallic fragments—both are much smaller and not the massive stellar assemblies described here. So the term that denotes those enormous collections is galaxy.