Sciencescience

Sun Feb 17, 2019, 08:25 PM

In the summer, days get shorter.

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Reply In the summer, days get shorter. (Original post)
Micrometer Feb 2019 OP
Gamle-ged Feb 2019 #1
Mr Daffy Duck Feb 2019 #2

Response to Micrometer (Original post)

Sun Feb 17, 2019, 08:35 PM

1. Yes, after the Summer Solstice...

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Response to Micrometer (Original post)

Mon Feb 18, 2019, 09:36 AM

2. True: Longest days accompany December solstice

“When we say the longest days of the year come each year around the December solstice, we’re talking about the day not as a period of daylight, but as the interval from one solar noon or midday to the next. In December, a day – one rotation of Earth relative to the noonday sun – is about one-half minute longer than the average 24 hours....

Days are always longer – as measured from one solar noon to the next – than 24 hours around the solstices, and less than 24 hours around the the equinoxes.

The days are at their longest now – for the whole globe – because we’re closer to the sun on the December solstice than we are at the June solstice. Earth’s perihelion – closest point to the sun – always comes in early January. When we’re closest to the sun, our planet is moving a little faster than average in its orbit. That means our planet is traveling through space a little farther than average each day. The result is that Earth has to rotate a little more on its axis for the sun to return to its noontime position. Hence the longer solar day....”

https://earthsky.org/tonight/longest-days-of-year-accompany-the-december-solstice


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