thunder science

An Example of the Electric Charge from Lightning Striking “From the Ground Up”.

Lightning is the movement of electric charge across a potential, striking more commonly when the potential is higher, such as the top of a tree. 

However although we tend to think of lightning “striking” the ground, the movement of charge can occur in either direction where the potential dictates, usually in both directions. 

In fact, the final strike coming from the ground to the sky is often the largest and brightest, as seen in the gif.


I fear Benedict. He is the Master of Arms for Amber. Can you conceive of a millennium? A thousand years? Several of them? Can you understand a man who, for almost every day of a lifetime like that, has spent some time dwelling with weapons, tactics, strategy? All that there is of military science thunders in his head. He has often journeyed from shadow to shadow, witnessing variation after variation on the same battle, with but slightly altered circumstances, in order to test his theories of warfare. He has commanded armies so vast that you could watch them march by day after day and see no end to the columns. Although he is inconvenienced by the loss of his arm, I would not wish to fight with him either with weapons or barehanded. It is fortunate that he has no designs upon the throne, or he would be occupying it right now. If he were, I believe that I would give up at this moment and pay him homage. I fear Benedict.

Chronicles of Amber, Roger Zelazny

It’s CATS IN SPACE week.

This is Mr. Wibbles.  He is a 5-time grand champion kashmir cat, and his hobbies include loafing on the sunny spot on the floor and chasing the ball with the bell in it. Do not piss him off. By the power of Grayskull, do not piss him off!

Buy it HERE.

Tonight, the evening of July 1, depending on the weather, you might get a glimpse of the full moon. That heavenly body will then be about five degrees of arc (the width of three fingers viewed at arm’s length) to the northwest of Pluto. This year, the little world is located in the direction of the starry teaspoon asterism in Sagittarius, but even with a rather large telescope, moonlight would make it impossible to discern that faint distant object.

July’s first full moon is sometimes known in tradition as the Full Thunder Moon. And on Friday night, July 31, we may see the second full moon of this month—a “Blue Moon.”

Learn more about July’s night sky from the SKY REPORTER