Just calling it "nebula" is fine.
a nebula !
It is sometimes called the Solar nebula.
cassiopeia
cassiopeia
A cloud in outer space consisting of gas or dust and planetry nebula is one of the types also called ring nebula or A planetary nebula is an emission nebula consisting of a glowing shell of gas
it is called a nebula
It is called a Nebula (nebulae for plural). no sorry but your wrong it is a coma It can be both it just depends. The question needs to be more specific
a nebula
NEBULA
A nebula is a cloud of dust and gas in space. Some of the clouds block out the light from the stars behind. These are called dark nebulae. One of the best-known is the Horsehead Nebula. Other dust clouds reflect the light from the stars and shine brightly. These are called bright nebulae. : Edit: The Great Orion Nebula is M42. M43 is a close nebula close to M42.
nebula
nebula