|Last: 7. Giant Worlds and Satellites||Next: 9. How Far the Stars?|
A thought-experiment: if we could transport a pint of gas from the center of the Sun to Earth, what would happen?
One of the largest eruptions ever observed is shown in this image. This huge arch is created by gas flowing along magnetic field lines.
A close-up of a large group of sunspots. These cool regions result when powerful magnetic fields prevent convection from transporting heat from the solar interior.
This image, taken using ultra-violet light, shows gas at temperatures of 1,500,000°K. Such gas reveals the inner part of the Sun's magnetic field.
The solar corona is a thin envelope of very hot gas gas surrounding the Sun. It becomes visible during a solar eclipse when the Moon blocks out the Sun's disk. The long streamers of the corona follow the Sun's magnetic field.
Sun and inner atmosphere, imaged using ultra-violet light.
Homework 8: Spectral Lines, due 10/18.
Quiz 8: Composition Of The Sun