protoplanet

As a noun 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.

As an adjective undefined is

lacking a definition or value.

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).

As a noun 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.

As an adjective nebular is

of or pertaining to a nebula.

As nouns the difference between protoplanet and planetary

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 planetary is a planetary nebula.

As an adjective planetary is

(astronomy) of, or relating to planets, or the orbital motion of planets.

As nouns the difference between protoplanet and planetessimal

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 planetessimal is misspelling of lang=en.

As nouns the difference between protoplanet and planets

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 planets is .

As nouns the difference between protoplanet and planetoid

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 planetoid is an asteroid of any size.

As nouns the difference between taxonomy and protoplanet

is that taxonomy is the science or the technique used to make a classification while 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.

%20 is likely misspelled.

%20 has no English definition.

As a noun 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.