Hoag’s Object is a Galaxy within a Galaxy within a Galaxy & nobody knows why…
Ring Galaxies account for less than 0,1% of all known galaxies, and so they aren't the easiest objects to study
NASA’s plans for the 2020s include humans on the moon, detecting quakes on Mars & defending Earth from deadly asteroids
NASA has planned an explosion of new space exploration projects
European Space Agency gets astronomical budget
ESA is still playing catch up to its US counterpart in terms of achievements and financial clout