- A-type star (Wikipedia)
A-type stars are among the more common naked eye stars, and are white or bluish-white. They have strong hydrogen lines, at a maximum by A0, and also lines of ionized metals (Fe II, Mg II, Si II) at a maximum at A5. The presence of Ca II lines is notably strengthening by this point. About 1 in 160 (0.625%) of the main-sequence stars in the solar neighborhood are A-type stars, which includes 9 stars within 15 parsecs.
- Prague (Wikipedia)
Prague (/ˈprɑːɡ/ PRAHG; Czech: Praha [ˈpraɦa] is the capital and largest city of the Czech Republic and the historical capital of Bohemia. Situated on the Vltava river, Prague is home to about 1.4 million people. The city has a temperate oceanic climate, with relatively warm summers and chilly winters.