In his latest blog entry from on board the International Space Station, André Kuipers writes about taking part in a NASA experiment that measures astronaut’s blood pressure and heart rhythm during long stays in space.

André writes: The ISS repeatedly flew across the “terminator” over the last weeks. The terminator is the border between day and night on Earth. Flying in this orbit is a weird feeling as we see the Sun continuously on the horizon. It came in handy to take pictures of the Venus transit but night-time photography was out of the question unfortunately. I focussed on the golden-yellow reflection of the Sun on Earth instead. This makes beautiful pictures as well. I don’t have much time to take pictures at the moment. It seems like my mission has gone into overdrive.

Read more in André’s blog: ICV: measuring blood flow and heart rhythm for 48 hours