Galaxies are large clusters of stars, gas, dust, and dark matter held together by gravity. They can contain anywhere from a few million to trillions of stars. Nebulae, on the other hand, are clouds of gas and dust in space. They can be found within galaxies and are often sites of new star formation. In short, a galaxy is a collection of various objects such as stars, dust, gas, and dark matter, while a nebula is a cloud of gas and dust.
Differences between galaxies and nebulae
