There are a couple of quick ways to check the number of people in space, right now there are 3. Usually the ISS has a crew of 6. The launch planned for the other 3 crew was delayed indefinitely due to a technical issue with the Soyuz craft:
in a one-sentence announcement on its web page early Saturday, Roscosmos, the Russian federal space agency, said the launch had been delayed “for technical reasons after tests at the Baikonur Space Center.”
It is not yet know how long the Soyuz might be grounded or what impact the delay might have on downstream flights.
Sometimes when crews are rotated, briefly there are 9 people on the ISS until the crew being relieved go home. I had thought that would be the preferred method, actually, to avoid being short-staffed, in case something just like this happened. Is it common for there briefly to be only 3 people on the station?
It looks possible that this delay could stretch out to weeks. Will the current crew be able to perform all the needed duties alright if they are in this situation for that long? Could some duties be foregone to keep their work load manageable?