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On the planet-watching side, it's been overcast all weekend, to a point where I doubt even the Moon, if on this side of the planet, would be visible. This evening, however, things cleared up, and my attempts were met with success. So, the inner solar system reaches 227 million kilometers - or 12.6 light-minutes - from the Sun to Mars. And from there distances grow quickly - at more than three times that, 43.3 light-minutes, lies Jupiter. The most faraway planet visible to the naked eye from here is Saturn at around 79 light-minutes, almost twice as far as Jupiter from the Sun (and once you've gone from the Sun to Saturn, it's more than twice as far again until you reach Uranus* - the planets might be big, but not compared to the distances separating them). Also, the every-day window from one location isn't very large. From when the sky gets dark enough for the planets to be visible (about one hour after sunset), you have around another hour to watch them until they set below the horizon. As for right now, it's getting late. I'm thinking it's time to take a shower, and be off to bed. *A lot of people have fun with this. Try to get it right, "YOOR-ah-nus", rather than "your anus" or "urine us". |