My teacher did a bad job explaining this so I appreciate it- your easy to understand video helped me do my science homework at 2 In the morning. Thanks!
@LiacosEM2 жыл бұрын
Well done, but I wouldn't recommend staying up till 2 to do your homework!! Good luck with the rest of the unit.
@elizabethschraderking87063 жыл бұрын
Another excellent video. Your demonstrations with shadows is exactly how I would want to do it... if I had the time, patience, and technical expertise to pull it off. Bravo!
@LiacosEM3 жыл бұрын
Thanks.
@PerimeterPermaculture2 жыл бұрын
Nicely done. Nice to hear a southern hemisphere take on things for a change.
@Pining_for_the_fjords3 жыл бұрын
There is a formula to calculate the sun's angle at midday at the summer solstice, winter solstice and equinoxes, at any given latitude. Where L = latitude: 90-L = sun's highest point at the equinoxes 90-L+23.5 = sun's highest point at the summer solstice 90-L-23.5 = sun's highest point at the winter solstice 90 because there are 90 degrees between the horizon and looking directly overhead, ie a right angle, and 23.5 because that's the earth's tilt. This is why the tropical regions are defined as within approximately 23.5 degrees from the equator, because 90-23.5+23.5 is obviously 90, meaning 23.5 is the latitude where the sun reaches directly overhead on the summer solstice, and anywhere between 23.5 degrees north and 23.5 degrees south the sun will rise directly overhead at least once a year. This is also why the polar regions are defined at approximately 66.5 degrees north or south of the equator, because 90-66.5-23.5=0, so at the arctic and antarctic circles the sun rises to 0 degrees, or directly on the horizon, on the winter solstice, and anywhere at a higher latitude will see polar night where the sun only reaches a negative altitude, or remains below the horizon, for at least one day of the year.
@LiacosEM3 жыл бұрын
Great examples. The difference between the second two formulas will always be 47 degrees. 90 - L + 23.5 - (90 - L - 23.5) = 90 - L + 23.5 - 90 + L + 23.5 = 47
@r.a.64595 ай бұрын
I live at around 6° north latitude. On one part of the year the sun is at the south sky, another part at the north sky. Here where I live, on April 4th and September 8th every year the sun is directly overhead. If you put a metre ruler vertically on those days where I am, the length of the shadow casted by the ruler is... nil!!! This is the sun is at 90° altitude, and cot 90° = 0.
@joelwatson48674 жыл бұрын
That's a great explanation, planning my new patio and garden, great to begin getting a better understanding of this science.
@LiacosEM4 жыл бұрын
Thanks, Joel. I hope your project goes well. There's more information at www.liacoseducationalmedia.com/shedding-light-on-the-sun-and-earth-episode-3-following-the-sun. The other consideration is the prevailing wind direction. In Melbourne, the winds come most commonly from the west and the south west, so the rain can enter a space more easily that is exposed to those directions.
@joelwatson48674 жыл бұрын
@@LiacosEM Definitely worth considering, thanks for the tip. Up in Brissie, and It's mainly from the south east winds on my block, so will consider this.
@bigyanbhattachan9582 Жыл бұрын
Absolutely Loved the video content! great job guys!
@thedumbchannel75713 жыл бұрын
I live around 53 degrees north and the sun gets to 60 degrees above the horizon in summer and 13 degrees above the horizon in winter that’s at solar noon
@projjalghosh92513 жыл бұрын
I am located 22.5 degrees north (22.5 degrees N latitude) of the Equator. At Solar Noon, here the Sun makes an angle of 44 degrees above the horizon on Winter Solstice and 89 degrees on Summer Solstice.
@rafaelsevero58913 жыл бұрын
hi, here in Brazil it's the same thing as Australia, the midday sun in December, it's almost over your head, and it makes 30 cm of shade in winter it makes more than 2 m of shade,and the sun is always pointed to the north,Live in the Localization 30 degrees south
@LiacosEM3 жыл бұрын
Melbourne is 38 degrees south, so our shadows are always a little longer here than they they are where you live in Brazil. In Rio, the sun is pretty much directly overhead at around the time of the December solstice, since Rio is more or less on the Tropic of Capricorn.
@projjalghosh92513 жыл бұрын
@@LiacosEM To be precise, it's 37.81 degrees South.
@bedtimereads98553 жыл бұрын
Thank you! Very helpful and effective demonstration and explanation.
@techtinkerin2 жыл бұрын
Thanks, very helpful. I never really noticed how much lower the sun is in winter until I noticed my solar panels in shade!! 😄👍😎❤️
@carljohnsoncj68964 жыл бұрын
In the uk in 21st June the shadow is around 45cm with a 1 meter stick. However in 21st December it’s like 1 meter stick shodow is like 4 meters long
@LiacosEM4 жыл бұрын
Wow. The UK is a lot further north of the equator than Melbourne is south of the equator.
@BrandonshanesProductions3 жыл бұрын
That should give the sun an angle of 15° in Winter and 65° in Summer. In New York the sun angle is usually 24° in winter and in Los Angeles its 32° in winter
@carljohnsoncj68963 жыл бұрын
@@BrandonshanesProductions winter sucks...
@LiacosEM3 жыл бұрын
@@BrandonshanesProductions The difference in the elevation of the sun at solar noon between the two solstices should always be about 47 degrees (which is 2 times 23 1/2 degrees, the tilt of the Earth).
@LiacosEM3 жыл бұрын
@@carljohnsoncj6896 It does. It's not just the cold, it's the short days!
@HSDesign3 жыл бұрын
Amazing sir
@b_bacon45342 жыл бұрын
Solar moon for me is at 11:53Am and in summer the sun climbs to a height of 86 degrees in summer and a height of 39 degrees in winter
@noahpalmer7191Ай бұрын
does the sun move faster in the winter and slower in the summer?? i think it does
@kaizarkthetitan04 жыл бұрын
I feel like I wouldn’t survive living in the Southern Hemisphere knowing that the sun faces north in mid day Yeah no thanks
@LiacosEM4 жыл бұрын
I went on a holiday to Europe and whenever I pulled a map out, I had to take a moment to get used to the fact that the map was facing north but the sun and the equator were behind me!!
@kaizarkthetitan04 жыл бұрын
@@LiacosEM you live in the Southern Hemisphere?
@LiacosEM4 жыл бұрын
I do! In the beautiful city of Melbourne.
@kaizarkthetitan03 жыл бұрын
@@LiacosEM noice
@projjalghosh92513 жыл бұрын
I am located 22.5 degrees north (22.5 degrees N latitude) of the Equator. At Solar Noon, here the Sun makes an angle of 44 degrees above the horizon on Winter Solstice and 89 degrees on Summer Solstice.
@LiacosEM3 жыл бұрын
So the sun must pass directly over head for you about a week before and about a week after the summer solstice. At solar noon on the day of the summer solstice, your (very short) shadow will be pointing southwards, unlike for most of the rest of the year.
@projjalghosh92513 жыл бұрын
@@LiacosEM Yeah! The fact is that the Sun is being 90° above the horizon starting today, and will continue till 10th June. Again this will be repeated from around 30th June for another 10 days.
@projjalghosh92513 жыл бұрын
@@LiacosEM We had our solar noon today at 11:34 AM. Now it's 1:00 PM, but still the angle is quite sharp.
@projjalghosh92513 жыл бұрын
@@LiacosEM Yup, the shadow length would be insignificant.
@samBrightuel3 жыл бұрын
I always wonder why the sun never goes completely overhead
@LiacosEM3 жыл бұрын
It does twice a year if you're in the tropics!
@katonalothbrok50193 жыл бұрын
The sun is rotating around the earth in the winter time the sun makes big circles around the earth in the summertime it makes small circles around the earth it’s just as it seems!
@LiacosEM3 жыл бұрын
Yes, the size of the circle above the horizon changes!