In this Research report, you must make your own reference-search for "Two current discovery/issues" in astronomical events/discovery only in the fields of stars, clusters, nebulae, galaxies and Cosmology (i.e., except for the Solar system/planets/comets etc.). Please choose 2 subjects among them.,,! Note) The "current" means: Recently published [news/events/papers] within 5 years from now. (2019. March. 01st ~ now)