This week I’m back at the Anglo-Australian Telescope (AAT, Siding Spring Observatory) as support astronomer. As the same time I’m helping visitors astronomer to get the best data using the 2dF instrument, I’m taking time-lapse sequences of the night sky using 2 CANON EOS 5D Mark III cameras. This afternoon, when checking the “preliminary” sequences of the previous night, I discovered a bright meteor in one of the frames. I was excited because at the beginning I thought it was a Leonid, but I checked and it seems to be a sporadic meteor or, perhaps, a meteor from the South Taurids shower.A reddish-greenish sky glow is also seen in the image. This glow has been also observed from the observatories in Chile as is consequence of chemical reactions involving oxygen (green colours, usually forming ozone) and nitrogen (red colours) molecules in our atmosphere. These chemical reactions are induced by ultraviolet emission from the Sun, which is much more intense when the solar cycle is in maximum, as it has been in the last few years.
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