French astronomy amateur Daniel Defourneau has been using The Imaging Source astronomy camera for six months. Last month he sent us this spectacular picture:
In his e-mail, he said (translated from French):
The camera works on the spectrum ranging from UV to infrared. A RG1000 filter was mounted in front of the camera to remove other spectrum but let infrared go through, so that the picture will reveal the dark part of Venus. The infrared emission on the planet's surface with temperature of 400°C can be seen in this picture. You have to set the DMK's exposure to 9 seconds to see the invisible side. The part that is not emitting infrared was replaced by the classic Venus image taken without filter.
Thanks Daniel for the great image!