Look out for the lunar eclipse tonight at sunset (which should be around 10pm). When the moon rises, it will already be in Earths shadow and if you were further east in Europe, this would be the longest eclipse of the century.
The Blackrock Observatory has some good advice – “Observers are encouraged to estimate the Danjon value at different times during the eclipse. André Danjon was a one eyed French astronomer who measured Earthlight on the Moon in the early part of the last century and developed at 5 point scale to record how bright or dark the Moon appears. On his scale zero corresponds to a very dark eclipse, with the Moon almost invisible, up to 4 – a very bright copper-red or orange eclipse.”
“It is difficult to predict the exact colour and intensity of the eclipse on the Moon. It’s worth paying special attention to the colour of the totally eclipsed moon, since it varies from eclipse to eclipse, depending on atmospheric conditions on the Earth. It is likely that we will see a coppery-red Moon, since even when the Moon is in the deepest shadow of the Earth, sunlight still manages to reach it. This sunlight has first passed deep through the Earth’s atmosphere which scatters out most of the blue light. The remaining light is a deep red or orange in color and is much dimmer than pure white sunlight. Earth’s atmosphere also refracts some of this light so that a small fraction of it can reach and light up the Moon.”
Have fun moongazing tonight, x