Archive of the University Observatory

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o:292370 Kategorie A: Sonne
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o:102646 Effektiver Durchmesser eines Sonnenflecks

Effektiver Durchmesser eines Sonnenflecks
Effektiver Durchmesser eines Sonnenflecks show more
Effektiver Durchmesser eines Sonnenflecks
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o:345262 Sunspots of August 5, 1893

Sunspots of August 5, 1893
Sunspots from August 5, 1893. Photographed with the spectroheliograph at the Kenwood Observatory. show more
Sunspots from August 5, 1893. Photographed with the spectroheliograph at the Kenwood Observatory.
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o:345265 Evolution of the sun in the Hertzsprung Russell diagram

Evolution of the sun in the Hertzsprung Russell diagram
The figure shows the two Phaidra objects No.: o:73506 and No.: o:73507 combined in one image show more
The figure shows the two Phaidra objects No.: o:73506 and No.: o:73507 combined in one image
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o:345266 Sunspot group, July 25, 1903

Sunspot group, July 25, 1903
Spot Group of July 25, 1903, showing high-level calcium flocculi. Enlarged section of image Astr.-HGD-A-1.2. / Astr.-GP-0001 (o:345267) show more
Spot Group of July 25, 1903, showing high-level calcium flocculi. Enlarged section of image Astr.-HGD-A-1.2. / Astr.-GP-0001 (o:345267)
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o:345267 Sunspot group, July 25, 1903

Sunspot group, July 25, 1903
Sunspot group from July 25, 1903, showing a distinct zone of low calcium levels. Photographed with the Rumford Spectroheliograph. Image Astr.-HGD-A-1.1 / Astr.-GP-0484 (o:345266) shows an enlarged section show more
Sunspot group from July 25, 1903, showing a distinct zone of low calcium levels. Photographed with the Rumford Spectroheliograph. Image Astr.-HGD-A-1.1 / Astr.-GP-0484 (o:345266) shows an enlarged section
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o:345268 Sun in the visual spectrum of light

Sun in the visual spectrum of light
Sun with several groups of spots, photographed in the visible spectrum of light show more
Sun with several groups of spots, photographed in the visible spectrum of light
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o:345269 Sunspot group of August 7, 1893

Sunspot group of August 7, 1893
Sunspot group from August 7, 1893, photographed with the spectroheliograph. The bright zones of the calcium line are clearly depicted. show more
Sunspot group from August 7, 1893, photographed with the spectroheliograph. The bright zones of the calcium line are clearly depicted.
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o:345273 Sonne mit Kalzium Flockuli

Sonne mit Kalzium Flockuli
Sonnenscheibe mit Protuberanzen. Aufgenommen am 18. April 1895. Quelle: Kenwood Observatorium Entstehungsjahr: 1895 Format: 12 x 9 cm Farbe: Schwarz/Weiß Archivalie: Glasplattendia Signatur: Astr. HGD_A-3.0 show more
Sonnenscheibe mit Protuberanzen. Aufgenommen am 18. April 1895. Quelle: Kenwood Observatorium Entstehungsjahr: 1895 Format: 12 x 9 cm Farbe: Schwarz/Weiß Archivalie: Glasplattendia Signatur: Astr. HGD_A-3.0
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o:345274 Solar eclipse of August 18, 1868

Solar eclipse of August 18, 1868
The total solar eclipse of August 18, 1868, stretched from East Africa across southern Asia to the western Pacific Ocean. Its maximum duration of totality was exceptionally long, lasting 6 minutes and 47 seconds. During this eclipse, the astronomer... show more
The total solar eclipse of August 18, 1868, stretched from East Africa across southern Asia to the western Pacific Ocean. Its maximum duration of totality was exceptionally long, lasting 6 minutes and 47 seconds. During this eclipse, the astronomer Jules Janssen discovered an emission line in the solar spectrum that could not be associated with any previously known element. It was attributed to an element found on the Sun, named helium, which was not detected on Earth until 14 years later. The solar eclipse of 1868 was the second-longest eclipse of Saros Cycle 133. It was surpassed only by the preceding eclipse of August 7, 1850, which belonged to the same cycle and whose totality was 3 seconds longer at 6 minutes and 50 seconds
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o:347577 Spektrum der Sonnenfinsternis vom Jahr 1900

Spektrum der Sonnenfinsternis vom Jahr 1900
Sonnenfinsternis vom 28. Mai 1900. Spektrum der Sonnenfinsternis, die dunklen Linien erzeugen bei der Aufnahme Halbmonde. Am 28.05.1900 zog der Kernschatten des Mondes u.a. über Teile Spaniens und über Algier. Die British Astronomical Association... show more
Sonnenfinsternis vom 28. Mai 1900. Spektrum der Sonnenfinsternis, die dunklen Linien erzeugen bei der Aufnahme Halbmonde. Am 28.05.1900 zog der Kernschatten des Mondes u.a. über Teile Spaniens und über Algier. Die British Astronomical Association schickte gleich mehrere Expeditionen los. Berichte dokumentieren, welch enor­mer wissenschaftlicher Aufwand be­trieben wurde. In Santa Pola wurde sogar eine komplette Mauer frisch mit weißer Farbe getüncht, um die Fliegenden Schatten besser beobachten zu können. Doch damals gab es offenbar bereits Leute, die nicht aus wissenschaftlichen Gründen, sondern aus reiner Neugierde aus anderen Regionen Spaniens in die Totalitätszone reisten, wie man einem der britischen Expeditionsberichte entnehmen kann. Die Zentralzone zog sich auch über den Südosten der USA, wo das Er­eignis ebenfalls für zahlreiche Unter­suchungen genutzt wurde. Quelle Text: Sonnenfinsternis.org Entstehungsjahr: um 1900 Format: 12 x 9 Archivalie: Glasplattendia Signatur: Astr.-GP-0005 Alte Signatur: Astr.-HGD-A-5.0
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