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Philippe and the first solar Balloon UV experiments

Discover the groundbreaking UV experiments conducted by Philippe with the first solar balloon on June 5, 1783. This historical event explored the Magnesium II (h) line at 2803 Å and Carbon I line at 1993.65 Å. The study utilized advanced calibration techniques and instruments such as the UVS lamp by Philips and Osram's Hg arc light. Philippe's research, linked to his thesis and exploration of atmospheric transmission through the stratosphere, sheds light on the early interactions between science and celestial observation. A poignant farewell to both the Sun and Philippe's pioneering legacy.

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Philippe and the first solar Balloon UV experiments

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  1. Philippe and the first solarBalloon UV experiments Philippe and the first solarBalloon UV experiments

  2. 5 juin 1783

  3. Magnesium II(h) line 2803 Å Carbon I line 1993,65 Å

  4. Calibration Étalonnage lampe UVS Philips n°126066 Calibration

  5. Miroir Quartz nu avec micromamelonnage de 3 à 5 microns. Les points brillants sont des poussières.

  6. Spectres: arc au charbon / lampe Hg UVS Osram

  7. First Thesis(1965)

  8. Rocket instrument and balloon instrument (RM Bonnet) rocket  balloon 

  9. Altitude = f (transmission)

  10. Magnesium II(h) line 2803 Å

  11. 1950-2050 Å Transmission through the stratosphere calculated while in flight with diatomic oxygen and ozone as the absorbers at 39 km altitude and 42° of Sun elevation.

  12. Carbon I line 1993,65 Å

  13. Instrument n°1

  14. 1967

  15. 1967times series 140 s apart Mg II h line

  16. Instrument n° 2

  17. 1969

  18. 1970

  19. Philippe’s Thesis 1971

  20. 2730 - 2930 Å 1950 - 2230 Å

  21. Is Philippe really making a salutation to his experiment ? NO! He is saluting his beloved Star.It’s an ancient custom used by old astronomers to see if our Sun is coronal or not.

  22. But if it’s a real retirement, it could be :Good-bye, the Sun For us, it’s: good-bye, Philippe and thank you! Should the time of your retirement be as long as 0,00000001 of the Sun’s life !

  23. First episodeThe EndFirst episode The End

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