Pre-Main-Sequence Evolution

Topic Page

Questions

• How do moving charges change the evolution of a magnetic field?
• What is a magnetic field? How were they formed?
• What causes magnetic fields to occur?
• What is a magnetic field composed of?
• How does a magnetic field act on matter through space?
• How can magnetic fields be created?
• How do protoplanetary discs form?
• What are protoplanetary bodies and what do they do?
• Why do some newly formed stars form protoplanetary discs while others do not?
• What are protoplanetary objects?
• How much mass was there in the protoplanetary disk out of which the planets formed, compared to the mass of the Sun?
• What physical process generates a force inside a pre-main-sequence star to offset the force of gravity and stop the star from slowly condensing and shrinking, thus producing a stable, non shrinking main-sequence star?