Why do you think a nebula needs a lot of mass in order to form a star? In your answer, be sure to explain the role that gravity plays in the formation of stars.

the bal will not change its velocity.

total distance/total time

(85 + 82)/(5+3)

167/8

20 just over

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.