- Slovakia (Wikipedia)
Slovakia (/sloʊˈvækiə, -ˈvɑːk-/; Slovak: Slovensko [ˈslɔʋenskɔ]), officially the Slovak Republic (Slovak: Slovenská republika [ˈslɔʋenskaː ˈrepublika]), is a landlocked country in Central Europe. It is bordered by Poland to the north, Ukraine to the east, Hungary to the south, Austria to the west, and the Czech Republic to the northwest. Slovakia’s mostly mountainous territory spans about 49,000 square kilometres (19,000 sq mi), hosting a population exceeding 5.4 million. The capital and largest city is Bratislava, while the second largest city is Košice.
- B-type star (Wikipedia)
B-type stars are very luminous and blue. Their spectra have neutral helium lines, which are most prominent at the B2 subclass, and moderate hydrogen lines. As O- and B-type stars are so energetic, they only live for a relatively short time. Thus, due to the low probability of kinematic interaction during their lifetime, they are unable to stray far from the area in which they formed, apart from runaway stars.