I am trying to identify an animated TV show for children that I watched as a child (younger than 6) between 1980 and 1986 in the UK.
The opening of each episode set the back story for the central character - a little girl - who accidentally ends up on a rocket ship which is launched to another world. She possibly might be accompanied by either her dog or a cuddly toy, I am not sure - I vaguely remember it being her dog that escaped and got her trapped in the rocket while she chased after it.
The natives of the planet she lands on are generally friendly, and again vaguely I remember them having circular heads split into two (similar to the South Park baby). The environment is jungle like.