Add to ORKGLong term variations in the diameter and the shape of the Sun were studied. Daily observations of the Sun's diameter made at the Greenwich Observatory between 1836 and 1953 were analysed and interpreted. The data was converted into digital form and then screened and processed. It was found that the horizontal diameter of the Sun measured at Greenwich appears to have decreased systematically between 1880 and 1953 at a rate of 1.2 plus or minus 0.6 minutes of arc per century
Context. For the past thirty years, modern ground-based time-series of the solar radius ha...
Old UBV and recent uvby photometry of solar-type dwarfs and other standard stars yield an upper limi...
The role of solar variability in climate evolution remains a topic of considerable scientific and so...
Changes in solar shape and diameter were detected as a possible probe of variability in solar lumino...
Cape and Paris meridian observations of the solar limbs which permit an estimate to be made of the s...
International audienceFor the past thirty years, modern ground-based time-series of the solar radius...
Observational evidence from surface temperature records is presented and discussed which suggests a ...
International audienceFor the past thirty years, modern ground-based time-series of the solar radius...
The equatorial rotation rate of the photosphere was measured at effect data. It was found that scatt...
Focus is given to possible variations in solar luminosity and accurate methods of monitoring it. Asi...
Stellar astronomy tells us much about the long-term evolution of our Sun while forensic evidence (fo...
Major results from paleoclimatic investigations are investigated, and background material is include...
From time immemorial men have strived to measure the size of celestial bodies. Among them,...
The advantages of a dedicated, ground-based observatory over measurements from spacecraft are its re...
Context. For the past thirty years, modern ground-based time-series of the solar radius ha...
Context. For the past thirty years, modern ground-based time-series of the solar radius ha...
Old UBV and recent uvby photometry of solar-type dwarfs and other standard stars yield an upper limi...
The role of solar variability in climate evolution remains a topic of considerable scientific and so...
Changes in solar shape and diameter were detected as a possible probe of variability in solar lumino...
Cape and Paris meridian observations of the solar limbs which permit an estimate to be made of the s...
International audienceFor the past thirty years, modern ground-based time-series of the solar radius...
Observational evidence from surface temperature records is presented and discussed which suggests a ...
International audienceFor the past thirty years, modern ground-based time-series of the solar radius...
The equatorial rotation rate of the photosphere was measured at effect data. It was found that scatt...
Focus is given to possible variations in solar luminosity and accurate methods of monitoring it. Asi...
Stellar astronomy tells us much about the long-term evolution of our Sun while forensic evidence (fo...
Major results from paleoclimatic investigations are investigated, and background material is include...
From time immemorial men have strived to measure the size of celestial bodies. Among them,...
The advantages of a dedicated, ground-based observatory over measurements from spacecraft are its re...
Context. For the past thirty years, modern ground-based time-series of the solar radius ha...
Context. For the past thirty years, modern ground-based time-series of the solar radius ha...
Old UBV and recent uvby photometry of solar-type dwarfs and other standard stars yield an upper limi...
The role of solar variability in climate evolution remains a topic of considerable scientific and so...