Trojan asteroids - follow Jupiter's orbit

Meteorite Types -

1) Primitive: Unchanged in composition since they first formed 4.6 billion years ago. Stony or carbon-rich.
2) Processed: Younger, have experienced processes like volcanism or differentiation. Can be metal rich (core like) or rocky (mantle like).

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All solar activity are related to magnetic fields:

Sunspots - occur where tightly wound magnetic fields poke straight from the solar interior. Tend to occur in pairs. Suppresses convection and prevents surrounding plasma from entering the sunspot. Cooler than surrounding regions.

Prominences - Last for days/weeks, trapped gas from the chromosphere, corona in the magnetic loops.

Solar flares - Magnetic activity that sends bursts of X-rays and charged particles into space. Occurs when highly twisted magnetic field lines snap to reorganize intto simpler form. Lasts minutes to hours.

Coronal holes - represent areas of broken open magnetic fields, along which particles spiral outwards as the solar wind. Dark regions in the X-ray picture.