- #1
ajith amboori
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hello
anyone have some notes on polar aurora?
thank you
anyone have some notes on polar aurora?
thank you
A polar aurora, also known as the aurora borealis in the Northern Hemisphere and aurora australis in the Southern Hemisphere, is a natural light display in the sky that primarily occurs in high-latitude regions. It is caused by the interaction of charged particles from the Sun with the Earth's magnetic field.
The colors in a polar aurora are caused by different gases in the Earth's atmosphere. Oxygen produces green and red colors, while nitrogen produces blue and purple colors. The specific color of a polar aurora depends on the altitude and energy of the charged particles.
The best time to see a polar aurora is during the winter months in the Northern and Southern Hemispheres. This is because the Earth's tilt allows for more direct interaction between the charged particles and the magnetic field. Additionally, the farther you are from light pollution, the better chance you have of seeing a polar aurora.
Studying polar auroras can provide insight into the Earth's magnetic field and its interaction with the Sun. It also helps scientists understand the effects of solar storms on Earth's atmosphere and can aid in predicting space weather events that can impact satellites and communication systems.
To photograph a polar aurora, you will need a camera with manual settings, a tripod, and a remote shutter release. Set your camera to a high ISO and a long exposure time (at least 10 seconds). Use a wide aperture and adjust the focus to infinity. Experiment with different settings to capture the best shot. It is also important to have a clear, dark sky and minimal light pollution for the best results.