The three new crew members of the International Space Station - Alexander Gerst, Maxim Suraev and Reid Wiseman - launched today from Baikonur Cosmodrome at 3:57 pm Eastern Daylight Time.

When they dock Expedition 40 will be at full strength.

One year ago today another Soyuz craft (pictured below) launched with Fyodor Yurchikhin, Karen Nyberg and Luca Parmitano on board to round out Expedition 36.

All images via NASA