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Published on May 20, 2015
Rise of Jupiter. Timelapse by Maciej Zapiór ( www.maciejzapior.com ) Music by Juan Miquel Romero
On January 23, 2015 rise of Jupiter was observed from the Astronomical Observatory of the University of the Balearic Islands (Palma de Mallorca). On the video you can see three astronomical effects:
1. Extincion. At the beginning of the movie, when observed field-of-view (FOV) is close to the horizon, only Jupiter itself is visible. The width of the air is thicker when looking close to the horizon than looking to the zenith. The huge amount of air makes faint object invisible. One by one, consecutive Galilean satellites appear, as they have consicutive lower brighness. Finally faint background star appears.
2. Color change. The image of Jupiter is more reddish at the beginning of the movie. It is caused by fact, the atmosphere scatters more efectively the blue part of the light. That's the reason why the Sun during sunset is red also, and the sky is blue during a day.
3. Refraction. When looking near the horizon, apparent altitude of observed object (stars, planets) is higher than if the Earth would have no atmosphere. The light beam from lower objects is curved due to the different refractive index on different layers of the atmosphere. As the telescope was tracking Jupiter with the constant angular velocity (the telescope was pointed on the position of Jupiter as without the atmosphere), the refraction caused shift of Jupiter image in the FOV.
Also during observations the airplane occults Ganimedes for a while.
The second part of the movie is a free reference to the last part of the 2001: a Space Odyssey movie.
Note that the timelapse was created solely with the IDL software.
The music was composed by Juan Miquel Romero especially for the timelapse.