Author: Anonymous

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.

The corona can only be glimpsed from Earth during a __________ .

Which of these are not associated with the active Sun?

Pluto is most similar to

What natural barrier prevents two protons from colliding and fusing?

Methane drives the weather of Titan, for there it can be liquid, solid, or gas.

Unlike the nuclear reactions in the Sun, everyday chemical reactions involve only the electromagnetic forces.