Labels: text | screenshot OCR: FIRST OBSERVATIONS THE CANALS OF MARS OBSERVATIONS OF SPACE PROBES A star observed from Earth in turbulent atmospheric conditions, for example, appears to flicker. This phenomenon had been observed as early as the 17th century by Sir Isaac Newton, who wrote: "Even if we could put into practice everything we know in theory about building telescopes, we would always come up against certain limitations. Because the air through which we observe the heavens is never still. These difficulties can be remedied only in the calmest and most peaceful atmosphere, like that one finds on the highest mountain peaks, well above the clouds." MARS BETAT
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