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Plan 5 treats the original eight worlds as historical origins, not mandatory top-level navigation.

Flagship system · Scale & Structure Explorer

Scale & Structure

Move from a galaxy’s central region outward to the environment around it. The explorer uses order-of-magnitude language because galaxies vary enormously.

Schematic cross-section of a galaxy showing nucleus, bulge, disk and halo as nested regions.

ICU-authored schematic · interpretive · not documentary imagery.

Use arrow keys on the slider. A textual description updates below.

Nucleuscentral
Bulgekpc
Disk10s kpc
Halobeyond bright disk
Environmentgroup / cluster
sourced

Bright structure is not all the mass

Dark matter is inferred from gravitational effects rather than ordinary emission or reflection of light. The halo in this teaching model should not be mistaken for a directly photographed dark-matter shell.

Source: GX-SRC-011

unknown

Centers remain research territory

Galaxies and their central supermassive black holes appear linked, but the exact order and mechanisms of early co-development remain active research questions.

Source: GX-SRC-003

interpretive

Diagram boundary

The nested drawing compresses many scales into one frame. Real component shapes, sizes and alignments vary, and no single viewing angle captures the full 3D system.