The universe formed most of its stars when it was just two or three billion years old, with star-formation dropping ever since.
New observations show that fully half of the most massive galaxies lost all their star-forming material by ~3 billion years of age, and they never got it back.
This great galactic genocide poses an enormous puzzle for astronomers, who are still struggling to understand why.
SOLUTIONs? The most massive galaxies where formed by the most massive Big Bang splitted equalsized (Herbig Haro) Black Holes. ( presenting the first GABHs, see BELOW)
In that 3 billion years, there was MANY SMALLER galaxy merging which made the gravitating (pressing with dark energy) space structure more complex. ( see below)
As a consequance Spiral Galaxies became a complex bulge growing into an elliptic galaxy. The smaller Merger galaxies merge also in a more prependicular position forming the thickness of the bulge.
Second, the gravity distribution inside the bulge, by the extra GABH black hole distribution increases the complexity of the vacuum gravity.
Origin: the Q-FFF Theory says: 1: the vacuum is anoscillating Axion pressure network of fluxtubes varying in length due to Herbig Haro SABH / GABH black hole dark matter content.
2, The formation of equal sized Herbig Haro black holes is decreased by the complexity of the bulge vacuum structure.
Conclusion: the larger the bulge, there is more vacuum complexity and less Herbig Haro ( star) formation in the bulge and in Elliptical galaxies. second
Conclusion : the bulge of the Milky Way is formed by these smaller Merger Spiral Galaxies each with at least two smaller GABHs at both sides most symmetrical at the spiral plane.
The Q-FFF Rigid String Theory says: (1) There is only one CONSTRUCTIVE Topological and Resilient TRANSFORMING STRING (Axion/vacuum Dark Energy building block ), forming direct after the Black Hole Splitting Big Bang. so called Travelling TADPOLE Black Hole based Filaments, expanding the Cosmic Lyman Alpha Structure. (2) A Raspberry Entangled 12x Mirror Copy Multiverse is Postulated as base for uncertainty (ER=EPR) and Libet's FREE VETO WILL . SO We live inside an exploded BH