As nouns the difference between protoplanet and nebula
is that protoplanet is an astronomical object, approximately the size of the moon, formed from the mutual gravitational attraction of planetesimals; they are thought to collide with each other and slowly form planets while nebula is (astronomy) a cloud in outer space consisting of gas or dust (eg a cloud formed after a star explodes).
protoplanet
English
Noun
(
wikipedia protoplanet)
(
en noun)
An astronomical object, approximately the size of the Moon, formed from the mutual gravitational attraction of planetesimals; they are thought to collide with each other and slowly form planets
Derived terms
* protoplanetary
nebula
Noun
(en-noun)
(astronomy) A cloud in outer space consisting of gas or dust (e.g. a cloud formed after a star explodes).
(archaic, medicine) A white spot or slight opacity of the cornea.
(obsolete, medicine) A cloudy appearance in the urine
Derived terms
* dark nebula
* diffuse nebula
* emission nebula
* planetary nebula
* preplanetary nebula
* protoplanetary nebula
* reflection nebula
* solar nebula
* stellar nebula
Related terms
* nebulosity
* nebulous
* nebular
See also
* plerion
* nova remnant
* supernova remnant
* Herbig-Haro object
* Bok globule
* interstellar cloud
* intergalactic cloud
* high velocity cloud
