Hey, I missed this! Great link, P.G. Studying the picture, I wondered why the moon’s intensity seemed so high compared to earth’s, since its reflectivity is much less than earth’s. The answer is given on the web page, which says that the earth image was over exposed, and it had to be highly processed, otherwise the continents wouldn’t even appear.
Yes, thanks PG. (I saw and enjoyed, but didn’t think to comment.) And thanks, rak, for mentioning intensity. I did not know that Earth’s reflectivity is greater than the moon’s. So, that’s the third reason for Earthshine — (1) when the moon is a crescent, Earth would appear almost full, (2) Earth’s diameter is about 4x so the reflecting area would be about 16x, and (3) the reflectivity is higher?
And around about now you-all are wishing my comments would start going back to the spam filter, I guess.
Hey, I missed this! Great link, P.G. Studying the picture, I wondered why the moon’s intensity seemed so high compared to earth’s, since its reflectivity is much less than earth’s. The answer is given on the web page, which says that the earth image was over exposed, and it had to be highly processed, otherwise the continents wouldn’t even appear.
Comment by rakkity — March 30, 2008 @ 7:20 pm
Yes, thanks PG. (I saw and enjoyed, but didn’t think to comment.) And thanks, rak, for mentioning intensity. I did not know that Earth’s reflectivity is greater than the moon’s. So, that’s the third reason for Earthshine — (1) when the moon is a crescent, Earth would appear almost full, (2) Earth’s diameter is about 4x so the reflecting area would be about 16x, and (3) the reflectivity is higher?
And around about now you-all are wishing my comments would start going back to the spam filter, I guess.
Comment by jennifer — March 30, 2008 @ 8:13 pm
I can take of that… .
P.G. updated his blog for the first time in five months.
Comment by michael — March 30, 2008 @ 8:50 pm
Ouch.
Comment by jennifer — March 30, 2008 @ 10:52 pm