## 18.8.13

### We're just a few months away from the sun flipping its magnetic field.

Solar observatories have been keeping an eye on changes in the sun that indicate the field reversal is imminent. Nobody on Earth is likely to wake up and notice a sudden change in the sun's magnetic field, so we'll have to wait for the official announcement from scientists.

We're hitting the peak of the solar cycle and the sun will be pulling off quite the gymnastics move to mark the occasion. The sun's polar magnetic fields weaken, go to zero, and then emerge again with the opposite polarity. This is a regular part of the solar cycle. As Earth orbits the sun, we dip in and out of the current sheet. Transitions from one side to another can stir up stormy space weather around our planet.

## Gravitational Force and Electromagnetic Base

Until a few years ago scientists believed that all forces could be categorized into five classes:

• Gravitational force - the force of attraction between any two objects with mass.
• Electric force - a force of attraction or repulsion between charged objects.
• Magnetic force - a force of attraction or repulsion between ferro magnetic objects.
• Strong force - the force holding protons and neutrons together in the nucleus.
• Weak force - the force which causes radioactive decay.

In recent years it has been shown that the magnetic, strong, and weak forces are all variations of the electric force now called the electro-weak force. Many scientists believe that the gravitational force may also have an electromagnetic base, but no proof exists as of now.
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