Depression may be challenging to assess in a patient with dementia. In patients with AD, the presence of depression may range from 6% to 30%, depending on the diagnostic criteria employed (Cummings et al., 1995). The prevalence and course of depression in dementia are controversial, due to several confounding factors.
Astronauts use space shuttles(trasport people and equipment), Space probes (robotic exploration, Spacecrafts (trasport crew, equipment, and other technologies).
But things may change under President-elect Trump. Right now, NASA is developing a capsule called Orion and a massive rocket known as the Space Launch System (SLS) to get astronauts to distant destinations, such as Mars.