Why does the universe form multiple galaxies instead of one super galaxy?
Galaxies are gravitationally anchored by extreme masses like supermassive black holes at their cores. A "universal galaxy" would require a single core that is able encompass the whole universe within its dominant gravitational influence. Gravity is too weak to work so effectively across such univ…
The Short Answer
Galaxies are gravitationally anchored by extreme masses like supermassive black holes at their cores. A "universal galaxy" would require a single core that is able encompass the whole universe within its dominant gravitational influence. Gravity is too weak to work so effectively across such universe-spanning distances. The idea is that there would always be a more local dominating field for matter to fall into. The presence of multiple accretion points like that across the universe pulled matter into the relatively distinct clumps we see today. The universe also continued to expand between these clumps to push them apart and further highlight the distinction. "Why was the universe lumpy in the first place?" is a big unknown.
Analysis
Key Concepts: Universe, across, matter
This explanation focuses on universe, across, matter and spans 116 words across 7 sentences. At 71% above the average Space & Astronomy explanation (68 words), this is one of the more thorough answers in this category, reflecting the complexity of the underlying question.
What This Answer Covers
The explanation opens with: “Galaxies are gravitationally anchored by extreme masses like supermassive black holes at their cores.” It then elaboratesultimately building toward a complete picture across 7 connected points.
How This Compares in Space & Astronomy
Ranked #74 of 500 Space & Astronomy questions by answer depth (top 16%). This places it in the comprehensive tier — the top quarter of most thoroughly answered questions. Questions at this depth typically involve multi-faceted topics requiring nuanced explanation.
Frequently Asked Questions
Is there a simple explanation for why the universe form multiple galaxies instead of one super galaxy?
Galaxies are gravitationally anchored by extreme masses like supermassive black holes at their cores. A "universal galaxy" would require a single core that is able encompass the whole universe within its dominant gravitational influence. Gravity is…
How detailed is this explanation compared to similar Space & Astronomy questions?
This is one of the most thorough answer at 116 words, ranked #74 of 500 Space & Astronomy questions by depth. The key concepts covered are universe, across, matter.
What approach does this answer take to explain the universe form multiple galaxies instead of one super gal?
The explanation uses direct explanation across 116 words. It is categorized under Space & Astronomy and addresses the question through 1 analytical lens.