Yes, aurora happens in Pittsburgh... a couple times a year. Aurora happens because particles ejected by the sun (solar wind) hit atoms in Earth's upper atmosphere. Visually an aurora is gray/green and by no means this colorful, because human can't see color well under low light conditions. Aurora prediction is available online.
See my
aurora section
for more photos.
Tip: to search within my pages only, keep inurl:zhuxj in your query. For example, inurl:zhuxj venus transit.
All images by Jerry Xiaojin Zhu unless noted otherwise. Feel free to use them for your personal enjoyment. For other usage please contact the author at jerryzhu@gmail.com
