Most responsible for the formation of a star is force. interstellar gravitational electromagnetic nuclear

Most responsible in the formation of stars is the GRAVITATIONAL Force. The gravitation force is a force that brings mass to one another to form the stars. Isaac Newton make a law of gravity. Star formation is included in the branch of Astronomy.

the aurora is formed when charged particles emitted from the sun during a solar flare penetrate the earth's magnetic shield and collide with atoms and molecules in our atmosphere. these collisions result in countless little bursts of light, called photons, which make up the aurora.

auroras are generated by charged solar particles hitting molecules in earth's atmosphere. this usually happens in high latitudes, because our planet’s magnetic field tends to funnel these particles toward the poles. that’s why it can be experienced in northern ohio.