Generally, Many has been done by Nasa. For instance, explore the human into space, the many celestial body into sky observed by the Hubble space telescope, sent to human on Lunar surface,

and also explore human on Martian surface in future. but major problem is normal people do not under how space agency do that like stuff, therefore My main motto is understand the falks, how space organization (especially NASA) put their effort persistent in one direction Of explore the Space.