< 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