Has anyone noticed if the length of their cycle is shorter when closer to the equator, and longer when further away???
216237
I've never found that, but I have found that at Daylight Savings Time, it will change.  It doesn't even sound plausible, but it always works like that. I'm really not sure why, but my mom and best friend have the same problem.  Who knows.
329625
Well the tropopause height increases as you move towards the equator (warmer air takes up more volume).  From what i remember, the tropopause becomes very blurry in the tropics, whereas it's very defined further north.  Perhaps that's partially because lapse rates are much lower in the tropics because of the consistant heat release from moist convection.  It also may be that the statosphere doesn't warm up as quickly because there is less of a depth of ozone to the incoming sunlight due to the angle.\n\nAs for jetstreams, there are different versions.  The well known and most persistant polar jet streams that mark the boundary from "polar air" to "tropical air" doesn't reach that far south... though it is always found just below the tropopause height because of the Thermal Wind balance.  The subtropical jet is found near the same general height, but is based on weak midlevel temperature gradients, is much less continuous through the year, and is located near the edges of the tropics.\nThe only real jets you get in the tropics are due to elevation features.  As such, many are low-level jets... and none are specifically located near the tropopause... because that location would suggest significant temperature gradients... which the tropics don't have.\n\n\nI took a look at soundings, and it does appear there is at least some version of a tropopause... usually at or above 100 mb... in the tropics.  You can use this site (UWyoming) to look at soundings from around the world (change type to GIF to 10mb or skewt):\nhttp://www.weather.uwyo.edu/upperair/sounding.html\n\n\nHope that helps answer your questions!  God bless,\nShane
395987
Actually there are two effects going on here, both of which result in New Hampshire having an earlier sunset.  One effect is exactly what your husband said.  The people on the western edge of a time zone will have later sunrises and sunsets than those on the eastern edge.  The other factor is that NH is farther North than GA, which means it will have shorter days in the winter.
382503
for every 15 degrees of longitude, there is essentially 1 hour difference in when the sun rises.  360 degrees/24 hours.   -  that set's up the time zones, basically.\n\nbut - it's not like the time just comes in 1 hour chunks :)\n\nevery degree on longitude is roughly 4 minutes away (sunrise, sunset...that is) from the next degree.  and in there....15 arc-minutes (1/4 degree) = 1 minute.   and so on. :)\n\nand...since the earth is constantly revolving, but we assign the same "local time" to a huge swath of the earth. - every spot on the earth sees the sun rise at a different moment as measured by "local time".\n\n:)
451930
Sometimes when you are under a lot of stress your period lasts longer. Sometimes that happens to me. Or it could have been a miscarriage you didn't know about.
99025
It depends on the toilet, not the hemisphere.\n\nYou are thinking of something called "the coriolis effect".  This is the effect which causes water to try to spin clockwise in the southern hemisphere and clounter-close wise in the northern hemisphere.  Although this effect is real, it has a negligible effect in everyday life, like in the draining of toilets.  Compared to other factors, the coriolis effect is extrememly weak and for all intensive purposes, does not influence the effect of water draining out of a toilet.
553431
Actually, me too!  I look at the clock all the time-- morning and night, and it's 9:11!  I thought, it's amazing.  I went through a period of about 6 months whenever I looked at the clock, it was specifically that time.  I thought maybe it was just in sync with my biological clock, but I couldn't shake the significance of those numbers.  I'm not sure what it all means-- but I do not believe in coincidences.  It's something worth looking into, definitely.  I'll be interested to find out your results.
623349
I don't know if it's true, but it's fascinating...as is when women live together or are together for a few months, their menses start to match each other, regardless of what their cycle may have been before.
22568
Actually, the Earth does move ever so slightly closer and farther from the sun at different times of the year. However, this is not what causes the change in temperature. The change in temperature is mainly caused by the tilt of the earth towards or away from the sun. So, for us in the Northern Hemisphere....during the winter, the northern axis of the earth is tilted slightly away from the sun. This means that the suns rays during the day are less direct on this part of the world. It's also why the sun seems to always be in your eyes during winter driving. It never rises far above the horizon.
571020
I'm not sure what he means by his explanation, but he's not totally off to think there would at least be a possibility of the longest 'day' not being adjacent to the shortest 'night'.\n\nAs measured from the Sun's local zenith to the next local zenith, solar days are not the same length of time (24 hours is just the average amount of time to get from noon to noon).  It takes longer to get from local noon to the next local noon at the solstices when the Earth is tilted directly toward or directly away from the Sun.  The shortest solar days (noon to noon) should be at the equinoxes.  (In other words, if there are more total seconds in the solar day at the solstice, then having the most daylight seconds doesn't necessarily mean having the shortest night time seconds).\n\nAdditionally, the Earth's orbit is slightly elliptical.  At perihelion (closest point to the Sun), the Earth is traveling faster and sweeping out a bigger angle per second.  That means the Earth has to rotate further to get back to noon the next day.  Solar days near perihelion are longer while solar days near apohelion (furthest from Sun) are shorter.  This is where your dad's argument starts to break down.  The Earth is at apohelion around the first week of July and at perihelion the first week of January.  In other words, there are more seconds in a solar day in the winter than there are in the summer.  The tilt of the Earth is more significant, so there are still more seconds in a solar day near the summer solstice than either equinox, even if the longest solar day (noon to noon) isn't in the summer.\n\nThe biggest reason his argument breaks down is sheer magnitude.  The variation in the length of a solar day is in seconds/day while the difference in the amount of daylight/darkness can be minutes/day (the amount of variation depends on a person's latitude)\n\nFor 2006, the longest daytime period will be on Jun 21, with the shortest nightime period being Jun 20 or 21 (the Naval Observatory's charts only list hours and minutes).
538347
Eliptical orbits. If the orbit were circular, then you'd expect the period to be the same. ...The planet speeds up and slows down and spends more time at the part of the orbit more distant from the sun.
97482
The equator is definetely an imaginary line. There cannot be a width to the equator, as it marks the middle of the earth, and the degrees either go north and south from it. If there was a possible width, it would be less than a nano second.
430085
Alot of things can change your cycle. Food, activity, stress, alcohol, age, etc., any differences really can effect to a certain degree. I'd take a few deep breaths and give it a few months to see if it levels out. If your having more pain than usual or more unusual symptoms then see your doctor. Good luck.
60174
If I understand your question, Earth's velocity around the Sun changes as its distance from the Sun changes; we are farthest from the Sun during summer (northern hemisphere "summer")and our orbital velocity is at its lowest. When our orbit takes us in closer to the Sun in winter, our velocity increases. Kepler determined the principles behind this relationship hundreds of years ago.
204764
The earth rotates on an axis. In the summer, your hemisphere is tilted towards the sun. This results in longer days, and the sunlight hitting the earth more straight on.\n\nIn the winter, your hemisphere is tilted away from the sun. This results in shorter days, and the light hits the earth at a greater angle. More light is reflected off the atmosphere and off the earth itself, which contributes to less heat absorbed. Also, the same area of sunlight is spread over a greater area (like shining a torch sideways along the ground), this reduced density of sunlight on the earth also means less heat is absorbed.\n\nThe seasons are more distinct further from the equator where the tilt has more of an effect. On the equator, there are actually 2 longest and 2 shortest days each year and less distinct seasons, as when the earth is on either side of the sun (during autumn/spring seasons) the sun is directly above the equator, no matter which side of the sun the earth is on.
585014
Of course! Everyone grows in different spots faster then others. That has happened to me and i still don't have my period yet. So don't worry, thats perfectly normal for some like you and me.
367678
length of equator is approximately 24,901.5 miles