Question

What holds the constituents of a galaxy together? [3 marks]

Answer 1

A galaxy is defined as a big group of stars, gas, and dust. (1 mark)
The universe has many galaxies, and each galaxy carries millions of stars and other celestial bodies which are bounded by the gravitational force. (1 mark)
Hence gravity, which is a property of matter by the virtue of its mass, binds all the components of a galaxy together. (1 mark)