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Miss Gayle

"Earth’s atmosphere is made up of different gases, mainly nitrogen and oxygen. The color of an aurora depends on the type of gas involved and how high up the collision occurs.

Aurora displays can occur at heights between approximately 80 and 500 km (50–311 miles) above Earth’s surface.

This also affects the colors that we see in the sky."

Article: timeanddate.com/news/astronomy

TimeAndDate.com Solar Maximum & the Aurora What Solar Maximum Means for Aurora Colors in 2025 By Eloise Elliott and Renate Mauland-Hus Published 26-Mar-2025 Will increased activity from the Sun affect the colors we see in the aurora this year? Find out the science behind these incredible lights in the sky. Aurora colors appear at different altitudes—this illustration shows an approximation, as actual heights can vary greatly. "It’s important to note that these are the typical altitudes for auroras, but they are famously unpredictable! Sometimes the ionized nitrogen molecules can travel up, and when sunlight hits them, they can create a blue color which can appear pink or purple if mixed with red emissions. This phenomenon is referred to as sunlit auroras. There have been some cases of blue auroras observed at heights of around 1000 km (621 miles), as well as red auroras at approximately 600 km (373 miles). This is likely the reason why many official sources on the aurora differ slightly when it comes to the altitudes where the different colors of the aurora are produced."
#Aurora#Astronomy#AstroPhotography
Mar 27, 2025, 07:48 PM·Public
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