Science Ideas. Please help w/ cells. 10 points BEST ANSWER.

I am making a science project, and my theme is outer space. I need to fit the parts of the cell with the parts of outer space.

For Example we thought of:
Ozone layer - Cell membrane

The parts of the cell that we have left to be matched are :
- Cell Membrane
- Cell Wall
- Chloroplast
- Cytoplasm
- Endoplasmic Reticulum
- Golgi Bodies
- Lysosome
- Mitochondria
- Nucleus
- Ribosomes
- Vacuole

The core of earth is the nucleus, Ribosomes/vacuoles/lysosomes are the chunks of diamonds and other minerals floating in the mantle, the mitochondria are the volcanoes (powerhouses), golgi bodies are the currents that move through the mantle, endoplasmic reticulum is... something (you think of it, please! :). Cytoplasm could be like the crust, cell membrane could be the stratosphere (where weather takes place), cell wall could be the ozone layer, and chloroplasts could be the reactions that occur in the earth to produce heat.
These are just suggestions, you can modify them!