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A solar __________ is a sudden violent disruption around sunspots, releasing a tremendous amout of energy in almost all wavelengths.

As the Sun rotates, an individual sunspot can be tracked across its face.  From eastern to western limb, this takes about:

The Galilean moon of most interest to exobiologists is

Without the strong nuclear force, the universe would be make only of hydrogen.

The only particle we can directly observe coming out of the Sun’s core is the __________ .

The sunspot cycle averages about 11 years.

The __________ year solar cycle includes both peaks in sunspot numbers and the magnetic polarity reversals.

Fusion depends upon the ____________ nuclear force getting the protons to stick together.

At its current rate of consuming hydrogen, the Sun can stably shine for__________ .

Compared to the underlying photosphere and chromosphere, the corona is __________ in temperature.