Galaxies in such groups often interact and even merge together in a dynamic cosmic dance of interacting gravity. Mergers cause gases surveying lab manual 3rd sem 3rrd towards the galactic center, which can trigger phenomena like rapid star formation. These intergalactic processes may be part of natural evolution by which irregular galaxies transform surveying lab manual 3rd sem
one of the other shapes, and by which spiral galaxies eventually become elliptical galaxies-as scientists big boss 4 shiv sena
they must. Galaxy Origins Most astronomers suggest that galaxies formed shortly after a cosmic "big bang" that began the universe some 10 billion to 20 billion years ago. In the milliseconds following this explosion, clouds of gases began to coalesce, collapse, and compress under gravity to form the building blocks of galaxies.