Perihelion H-alpha Sun
4thJanuary 2025The image of our Sun above is from data taken with a few hours
of Earth's passage through solar
perihelion
The variation in the Sun's apparent size (about 3.4%) results
in only about a 7% increase in solar energy reaching the Earth at perihelion.
While scientifically detectable, the difference isn't enough
to cause significant temperature changes globally.
Astro-Physics AP130GTX + AP BARCON
Coronado 90mm Double-stack etalons + BF30
QHY533M
Copyright Peter J Ward 2025