Why is there a minimum mass for an object to become a star? smaller objects cannot be detected from earth. smaller objects cannot hold planets in orbit. smaller objects cannot generate enough pressure to start hydrogen fusion. smaller objects do not have hydrogen for fusion. user: the core of a star must reach a temperature of degrees celsius for hydrogen fusion to begin. 10,000 100,000 1,000,000 10,000,000 100,000,000

1. smaller objects cannot generate enough pressure to start hydrogen fusion.

2. 10,000,000

Explanation:

1. Stars are born in stellar nurseries known as nebula. A nebula is cloud of dust and gases. The disk of dust and gases when spins and gathers more and more mass, the temperature and pressure rises. If sufficient mass is gathered and right temperature and pressure is achieved fusion reaction starts and a star is born. Thus, smaller objects cannot generate enough pressure to start hydrogen fusion.

2.  the core of a star must reach a temperature of  10,000,000  degrees Celsius for hydrogen fusion to begin.

Hydrogen fusion reaction in sun is:

Overall reaction for the above series of reactions is given by:

answer(20) psi;