Which is the largest a nebula a galaxy a neutron star a globular star or a nebulae?

Answer 1

Galaxies are by far the largest. Galaxies contain millions to trillions of stars, each orbiting the galaxy's centre of mass. Our own Milky Way is an example of a galaxy, of which our sun is just one of 200 to 400 billion other stars. The Milky Way is estimated to be in the region of 100,000 to 120,000 light years across.

Nebulae (the plural of nebula) are gas regions where stars are often formed. They exist within galaxies and are therefore much smaller. The famous Orion Nebula is estimated to be 24 light years across, while the larger Carina Nebula is in the region of 100 light years across. Both exist within the Milky Way.

A globular star, or globular cluster, is a cluster of stars. There are around 150 to 158 such clusters known to exist in the Milky Way, with perhaps 20 more yet to be discovered.

A neutron star is a stellar remnant, the result of a supernova (exploding star). They are much smaller than the original star would have been, but are incredibly dense and often rotate very rapidly, emitting electromagnetic radiation as pulsars.