Mark Oak Park Observatory (aka my backyard) Bortle 7 Orion 90mm AstroView; EQ-2; 1.25" 25mm, 10mm Plossl Celestron Eyepiece Kit; 1.25" Barlow x2, 32mm, 17mm, 13mm, 8mm, 6mm Plossl; filters UO Super Abbe Orthos; 1.25" 7.7mm, 16.8mm Meade 60mm StarFinder; modified alt/az video camera tripod (it works!); .965" 25mm, 12.5mm, 9mm, 4mm; Moon filter. Meade 60mm Jupiter; Antares .965" 25mm, 12.5mm 10mm Super Plossl Bushnell 7x35 binos Simmons 10x50 binos Beach Chair
Quote:Weird question. I've been doing a little research on our sun and have learned that it can take upwards of 100,000 years for a light photon emitted by the core to travel through the radiation zone and outward to where we can see it here on earth.Does the sun also absorb photons emitted or reflected from outside sources (e.g.,from planets or moons, or from distant stars) and add them back into the mix?
I ache, therefore I am
Quote:Does the sun also absorb photons emitted or reflected from outside sources (e.g.,from planets or moons, or from distant stars) and add them back into the mix?
--Dawg, the Russell "Akita mani yo." Observe everything as you walk. (--Lakota) Celestron Celestar 8 Standard SCT, f10 Celestron C80ED ref., f7.5 Celestron 80mm Wide View ref., f5 Orion 120ST ref., f5 Criterion RV-6 Dynascope, Newt., f8, (c. 1962) Sears Discoverer 60mm ref., f7, (c. 1973) Celestron Ultima DX 10x50 Nikon Action Extreme 10x50 Tasco 7x35 wide
Quote:What happens to photons once they hit our retina?
Quote:Quote:What happens to photons once they hit our retina? The energy is absorbed. What happens is that some of the energy is used to break a bond in special molecules (rhodopsin) present in the retinal cells & this generates a nerve signal which travels to the brain. The rest of the energy just makes the retina very slightly warmer, the heat is carried away by the bloodstream. The rhodopsin is regenerated by ongoing metabolic activity in the retinal cells.