Answer: not a
First when gas and dust grains collide they agglomerate by microphysical processes like van der Waals forces and electromagnetic forces forming micrometer-sized …
Stellar evolution is the process by which a star changes over the course of time. Depending on the mass of the star its lifetime can range from a few million years …
During the merger if there is enough gas the increased gravity will force the gas to the centre of the forming elliptical galaxy. This may lead to a short period of …
Gravitational collapse is the contraction of an astronomical object due to the influence of its own gravity which tends to draw matter inward toward the centre of gravity. Gravitational collapse is a fundamental mechanism for structure formation in the universe. Over time an initial relatively smooth distribution of matter will collapse to form pockets of higher density typically creating a …
A more compact site of star formation is the opaque clouds of dense gas and dust known as Bok globules so named after the astronomer Bart Bok. These can form in …
The study of galaxy formation and evolution is concerned with the processes that formed a heterogeneous universe from a homogeneous beginning the formation of the first galaxies the way galaxies change over time and the processes that have generated the variety of structures observed in nearby galaxies. Galaxy formation is hypothesized to occur from structure formatio…