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< 0.50 mag < 1.50 mag < 2.50 mag < 3.50 mag < 4.50 mag < 5.50 mag < 6.50 mag < 7.50 mag Maps for GLOBE at Night at latitude 50◦, February 23, 21 h local time (deep night), assuming rather transparent air. Orion’s belt is 30◦ to the right from the south, at 35◦ height. The brightest fixed star, Sirius, is at lower left. Jan Hollan, Ecological Institute Veronica and http://www.astro.cz/darksky < 0.50 mag < 1.50 mag < 2.50 mag < 3.50 mag < 4.50 mag < 5.50 mag < 6.50 mag < 7.50 mag Maps for GLOBE at Night at latitude 50◦, March 2, 21 h local time (deep night), assuming rather transparent air. Orion’s belt is 38◦ to the right from the south, at 33◦ height. The brightest fixed star, Sirius, is at lower left. Jan Hollan, Ecological Institute Veronica and http://www.astro.cz/darksky Betelgeuse Pollux Arcturus Procyon Sirius Sirius S < 0.50 mag S < 1.50 mag Big Dipper Big Big Dipper Big Betelgeuse Betelgeuse Pollux Pollux Arcturus Procyon Arcturus Procyon Sirius Sirius Regulus Denebola Regulus Saturn Saturn S < 2.50 mag S < 3.50 mag Regulus Regulus Denebola Denebola < 4.50 mag < 5.50 mag Regulus Regulus Denebola Denebola < 6.50 mag < 7.50 mag Maps for GLOBE at Night at latitude 50◦, March 23, 21 h local time (Sun at -25◦). Lines from N(E,S,W) to zenith shown (crosses each 10◦). Regulus (α Leonis) is 25◦ to the left from S, at 50◦ height. Detailed maps vertical size 50◦, the first four maps 100◦. Jan Hollan, Ecol. Inst. Veronica and http://www.astro.cz/darksky Betelgeuse Pollux Arcturus Procyon Sirius Saturn Sirius < 0.50 mag < 1.50 mag S S Big Dipper Big Big Dipper Big Betelgeuse Betelgeuse Pollux Pollux Arcturus Arcturus Procyon Procyon Denebola Denebola Saturn Regulus Sirius Saturn Regulus Sirius < 2.50 mag < 3.50 mag S S Pollux Pollux Denebola Regulus Denebola Regulus < 4.50 mag < 5.50 mag Pollux Pollux Denebola Regulus Denebola Regulus < 6.50 mag < 7.50 mag Maps for GLOBE at Night at latitude 50◦, March 30, 21 h local time (Sun at -23◦). Lines from N(E,S,W) to zenith shown (crosses each 10◦). Regulus (α Leonis) is 15◦ to the left from S, at 51◦ height. Detailed maps vertical size 50◦, the first four maps 100◦. Jan Hollan, Ecol. Inst. Veronica and http://www.astro.cz/darksky Arcturus Arcturus Pollux Betelgeuse Saturn Procyon Sirius Sirius < 0.50 mag < 1.50 mag Big Dipper Big Big Dipper Big Pollux Arcturus Pollux Arcturus Betelgeuse Betelgeuse Saturn Denebola Procyon Saturn Denebola Procyon Regulus Regulus Sirius Sirius < 2.50 mag < 3.50 mag Pollux Pollux Denebola Denebola Regulus Regulus < 4.50 mag < 5.50 mag Pollux Pollux Denebola Denebola Regulus Regulus < 6.50 mag < 7.50 mag Maps for GLOBE at Night at latitude 50◦, April 6, 21 h local time (Sun at -21◦). Lines from N(E,S,W) to zenith shown (crosses each 10◦). Regulus (α Leonis) is 4◦ to the left from S, at 52◦ height. Detailed maps vertical size 50◦, the first four maps 100◦. Jan Hollan, Ecol. Inst. Veronica and http://www.astro.cz/darksky.

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