Sentences with phrase «round planetary nebulas»

Not exact matches

The term planetary nebula is something of a misnomer, which arises from the fact that they are often round and resemble planets in low - resolution observations.

But most planetary nebulas are not round.

The first of these are planetary nebulae, so called because they're round objects that resemble planets.

The name «planetary nebula» refers only to the round shape that many of these objects show when examined through a small telescope.