There are five 3 word clues for each of the things related to the sun.
Corona- Aura of plasma, The sun's crown, Observed with coronagraph, Has High Temperature, Hard to see
Solar Prominence- Flame-like ember tongues, Large sun eruptions, One day formation, Affect solar atmosphere, Lasts for days
Solar Flare- Flash of brightness, Over sun's surface, Spectrum of emissions, Occur around sunspots, Ejects electron clouds
Sunspots- A temporary phenomena, On sun's surface, 11-year solar cycle, It appears dark, Expand and contract