I've been getting requests to explain phenomenon occurring on earth as well..
I saw this perfect picture by @seanscottphotography which captures a stunning site of lightning hitting the ocean.. Some regions of the cloud are electrically charged. When a sudden electrical discharge occurs between two clouds or a cloud and the ground we experience lightning. The charged regions in the atmosphere temporarily equalize themselves through this discharge. Lightning creates light in the form of black body radiation from the very hot plasma created by the electron flow, and sound in the form of thunder.
In order for an electrostatic discharge to occur, two preconditions are necessary: firstly, a sufficiently high electric potential between two regions of space must exist, and secondly a high-resistance medium must obstruct the free, unimpeded equalization of the opposite charges.
Objects struck by lightning experience heat and magnetic forces of great magnitude. The heat created by lightning currents traveling through a tree may vaporize its sap, causing a steam explosion that bursts the trunk. Lightning also serves an important role in the nitrogen cycle by oxidizing diatomic nitrogen in the air into nitrates which are deposited by rain and can fertilize the growth of plants and other organisms.
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A red variable star and it's light echo in Monoceros
Last October, I wrote an article for @landscapephotomag regarding my experience shooting single exposures with the @skywatcherusa StarAdventurer tracker. I discuss pushing the limits of the Rule of 500 to create single exposures of the Milky Way. Head over to their website to read the article. This is one of the images I captured using the Skywatcher. It is a 38 second single exposure taken with a Canon 6D and a Rokinon 14mm 2.8. Flash placement and timing of that flash is the key to making sure you don't get foreground streaks during tracking.
Btw...I've got new photo workshop dates for Spring 2018 in the link in my bio. Join me in Malibu!