Despite their similar and sometimes confusing acronyms and their overall purpose of allowing tax-free reimbursement of various types of medical expenses, health savings accounts (HSAs) and health reimbursement arrangements (HRAs) are quite different when you get down to the details.
A full rotation of Pluto takes 6 Earth days, 9 hours, and some minutes; so the day part should be about half that amount (3 days and 5 hours), at least on average.
Image caption This image of Pluto was taken on Tuesday and was downlinked just before the flyby. Nasa's New Horizons spacecraft has made the first visit to Pluto, speeding past at 14km per second. Earlier, the space agency released the most detailed picture yet as it hurtled towards the dwarf planet on Tuesday.