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Thursday, July 24, 2014

Our neighbor star on June 4th, 2014

Image: The Sun on June 4th, 2014

Many large  sunspots indicate high solar activity. A couple of them were visible in the photosphere of our neighbor star on June 4th, 2014. The photosphere is the lowest layer of the Sun's atmosphere. It is 400 km thick and its temperature varies from 7500°K to 4500°K. Sunspots and granules are visible through an amateur telescope equipped with special safety film [see also Baader Astrosolar (R)], which is mandatory for Sun observations and photography.

Thursday, July 17, 2014

Saturn: The ring planet on July, 16th 2014

Image: The ring planet in July 2014

Yesterday night, I spontaneously decided to make some shots of Saturn, since the ring planet will loose on altitude in the next years making it a difficult target. Saturn was 9.5AU away from the Earth and had an angular size of 18" and a brightness of 0.45mag.

Sunday, July 13, 2014

A six days old moon (2014)

Image: The six days old Moon

Up on the terminator line: Aristoteles and Eudoxus craters.
Up-right: the Hercules and Atlas craters.
Below the Posidonius crater is the landing site of the Apollo 17 mission.
Middle: The Apollo 11 landing site, the Theophilus, Cyrillus and Catharina craters
Down: Maurolycus (black wolf) crater
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HiRes image: http://bit.ly/1s8kK8f