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Hi all,
I guess that issue may be considered part of space policy as it is often where future astronomers and astronauts may first encounter the topic of what is "out there" and become fond of it. Also, it spreads a general knowledge of basic things like causes of day and night, seasons and other things where astronomy and earthly matters meet. I am very curious what it is like where you live in. In Poland astronomy used to be a regular subject at school around the time of the golden space era of the 1960s, then was degraded to becoming part of physics classes in the 1980s and driven completely out of school curricula around now. So, what are you opinions on that? Is astronomy still taught at school where you live? Should it be taught at school at all? Regards, Karol P. |
#2
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![]() wrote: Hi all, I guess that issue may be considered part of space policy as it is often where future astronomers and astronauts may first encounter the topic of what is "out there" and become fond of it. Also, it spreads a general knowledge of basic things like causes of day and night, seasons and other things where astronomy and earthly matters meet. I am very curious what it is like where you live in. In Poland astronomy used to be a regular subject at school around the time of the golden space era of the 1960s, then was degraded to becoming part of physics classes in the 1980s and driven completely out of school curricula around now. So, what are you opinions on that? Is astronomy still taught at school where you live? Should it be taught at school at all? Regards, Karol P. In the 1960's,terrestrial ballistics extended to sending rockets into space was a genuine human achievement but it is not astronomy although you would hardly know it. I see the Polish people watch the work of the countryman (Copernicus) destroyed by less careful men, without objection and even with their full support but then again, astronomy is an individual pursuit that does not pander to nationalistic sentiments.It is however open to false ideologies and although the spurt of interest generated by humanity's first endeavor into space in the 60's is a genuine achievement,the exotic and novelistic concepts of the eartbound creatures still moves in the opposite sub-geocentric direction. Even with imaging of the Earth from space and with priority given to climatology and global warming,these guys still can;'t provide the correct explanation for hemisopherical weather patterns (seasons).They still attribute a variable axial tilt to the Sun rather than adopt the changing orbital orientation against fixed axial orientation - http://en.wikipedia.org/wiki/Image:Seasonearth.png What is a little (unintentionally) off-putting with those correct images is that it gives no real idea of the Earth's change in orbital orientation and it can be easily fixed by not showing the difference between the orbital shadow and solar radiation facing in the same direction,at least in the June and Dec images. |
#3
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I teach astronomy at all levels all over the UK
It is still taught in all schools but at differeing levels Cheers Andy StarDome Planetarium - Your Window On The Universe - Officially Out Of This World! Mr Andrew R Green B.Sc(Hons) FRAS. www.stardome-planetarium.com www.stardomeplanetarium.co.uk wrote in message ps.com... Hi all, I guess that issue may be considered part of space policy as it is often where future astronomers and astronauts may first encounter the topic of what is "out there" and become fond of it. Also, it spreads a general knowledge of basic things like causes of day and night, seasons and other things where astronomy and earthly matters meet. I am very curious what it is like where you live in. In Poland astronomy used to be a regular subject at school around the time of the golden space era of the 1960s, then was degraded to becoming part of physics classes in the 1980s and driven completely out of school curricula around now. So, what are you opinions on that? Is astronomy still taught at school where you live? Should it be taught at school at all? Regards, Karol P. |
#4
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differing even!
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#5
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![]() "oriel36" laboured on in message ups.com... SNIP Even with imaging of the Earth from space and with priority given to climatology and global warming,these guys still can;'t provide the correct explanation for hemisopherical weather patterns (seasons).They still attribute a variable axial tilt to the Sun rather than adopt the changing orbital orientation against fixed axial orientation - http://en.wikipedia.org/wiki/Image:Seasonearth.png DEEP BREATH Let's try to get rid of some of your confusion about the seasons. The Earth's orbit is in the shape of an ellipse, so that sometimes the Earth is a tiny bit closer to the Sun than at other times. But this does not account for the seasonal weather change. You can imagine that if the seasons were caused by the Earth's orbit, people in the northern hemisphere and people in the southern hemisphere would have the same seasons. For example, if winter occurred because the Earth was further away from the Sun, everywhere on Earth would be cold at the same time. Summer in the northern hemisphere occurs at the same time as winter in the south, and vice-versa. It turns out that the Earth's orbit is nearly perfectly circular, and the difference between its closest point and its furthest point is very small. In actual fact, the Earth is furthest away from the Sun in June when it is summer in the northern hemisphere. The Earth is a very special planet in many ways. Just as Earth's unique atmosphere and its distance from the Sun work together to make Earth the right temperature to support life, Earth's orbit and its tilt work together to create the seasons. The tilt of Earth's rotational axis and the Earth's orbit work together to create the seasons. As the Earth travels around the Sun, it remains tipped in the same direction, its axis pointing towards the star Polaris. This means that sometimes the northern half of the Earth is pointing towards the Sun (summer), and sometimes it is pointing away (winter). These points in the Earth's orbit are called solstices. The Earth's tilt remains an almost constant 23.5 degrees to the plane of the ecliptic, apart from a very very slow and tiny precession which takes place over thousands of years. Notice that when the northern hemisphere is tilted towards the Sun, the southern hemisphere is tilted away. This explains why the hemispheres have opposite seasons. The link http://en.wikipedia.org/wiki/Image:Seasonearth.png demonstrates this perfectly. Halfway between the solstices, the Earth is neither tilted directly towards nor directly away from the Sun. At these times, called the equinoxes, both hemispheres receive roughly equal amounts of sunlight. Equinoxes mark the seasons of autumn and spring and are a transition between the two more extreme seasons, summer and winter. There is no black magic or mumbo-jumbo to all this, Gerald. If you point your backside towards the fire it will get hot - if you point it away at an angle it won't get so warm. Even first year primary school children can understand this simple 3-dimensional trick of the light, so it is is difficult to understand why you drag ancient figures and heliocentricity into your endless drivel. We all KNOW the earth orbits around the sun. We all KNOW its axis is tilted and that combined with its 12 month orbit this yields the seasons. You can dress the mechanism up any way you want; it doesn't change what is fundamentally a very simple concept. But if you feel the need to challenge any part of the above explanation (an explanation that is shared by the same scientists who successfully send probes with pinpoint accuracy to the furthermost planets of our Solar System) then please state clearly where you think the errors lie. I wait with baited breath. |
#6
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![]() "oriel36" wrote in message ups.com... SNIP http://en.wikipedia.org/wiki/Image:Seasonearth.png What is a little (unintentionally) off-putting with those correct images is that it gives no real idea of the Earth's change in orbital orientation and it can be easily fixed by not showing the difference between the orbital shadow and solar radiation facing in the same direction,at least in the June and Dec images. The only thing 'wrong' with the presentation of those images, in an astronomical sense, is that they show the Earth with its polar axis vertical rather than at 23.5 degrees to the vertical. The shadow and illuminated portions are precisely what happens in reality. |
#7
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![]() Andy G wrote: I teach astronomy at all levels all over the UK It is still taught in all schools but at differeing levels Usually as a part of the physics syllabus, but it is available as a separate GCSE exam qualification through Edexcel (formally London board). Details available at: http://www.edexcel.org.uk/quals/gcse...specification/ (it was an easy extra certificate for anyone keen on astronomy) A quick glance at the modern syllabus suggests that it has become more qualitative and all the spherical trig for rising setting and coordinate transforms has been removed. Regards, Martin Brown |
#9
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![]() This is an exercise in keeping things local. Hemispherical weather patterns (seasons) are not due to variable axial tilt to the Sun,the seasons are a subset of a global change in orbital orientation against fixed axial orientation.Trying to account for seasons by saying that the Northern hemisphere tilts towards the Sun in summer and away in winter is tantamount to a variable tilting Earth whatever way you try to put it. Here is what you do. 1 Drop the Earth's axial/Equatorial reference to the Sun or celestial background and acknowledged that it remains fixed and a consequence of axial rotation. http://photojournal.jpl.nasa.gov/jpe...114_modest.jpg 2 Acknowledge a change in the relationship between the orbital orientation (determined by the seperation between solar radiation and the orbital shadow) and fixed axial orientation due to the motion and path of the Earth's orbit around the Sun - http://upload.wikimedia.org/wikipedi...easonearth.png 3 Use the oscillation of temperature bands to determine that hemispherical weather patterns (seasons) are influenced by the length of time a location spends in the Earth's orbital shadow or in direct solar radiation more than inclination to solar radiation. - http://www.climateprediction.net/ima...ges/annual.gif Stick to those few basic tenets which drop referencing the Earth to the distant Sun and create a more productive view based on the behavior of axial and orbital motions/orientation in received solar radiation and in the Earth orbital shadow. Of course you have developed the variable tilting Earth and its attendent celestial sphere geometry to the point where you simply cannot see the new approach to climate and to seasons - http://www.dur.ac.uk/john.lucey/users/solar_year.html By referencing everything off axial co-ordinates to celestial sphere geometry and refusing to consider orbital motion in isolation, you fail to see that the orbital path of the Earth which causes the orbital shadow to change against fixed axial orientation generates global climate which in turn can be reduced to hemispherical weather patterns. I do not know why meteorologists or climatologists do not pick up on the required astronomical modification required to bring excellent imaging and data in line with 21st century climate studies.It is an enormous task yet the benefits are incredibly powerful and different than the poor way of varying the tilt of the Earth to the Sun to explain the seasons.Perhaps it is laziness,perhaps indoctrination or something worse but allowing the orbital path and consequently orbital orientation to drift longitudinally and latitudinally against fixed axial orientation is the only way to go. Spare me your deep breaths or whatever silly emoticon I have to put up with,climatology will become far more interesting and dynamic once it starts to mesh accurately with astronomy and what is known about the motions of the Earth in direct solar radiation. TeaTime wrote: "oriel36" laboured on in message ups.com... SNIP Even with imaging of the Earth from space and with priority given to climatology and global warming,these guys still can;'t provide the correct explanation for hemisopherical weather patterns (seasons).They still attribute a variable axial tilt to the Sun rather than adopt the changing orbital orientation against fixed axial orientation - http://en.wikipedia.org/wiki/Image:Seasonearth.png DEEP BREATH Let's try to get rid of some of your confusion about the seasons. The Earth's orbit is in the shape of an ellipse, so that sometimes the Earth is a tiny bit closer to the Sun than at other times. But this does not account for the seasonal weather change. You can imagine that if the seasons were caused by the Earth's orbit, people in the northern hemisphere and people in the southern hemisphere would have the same seasons. For example, if winter occurred because the Earth was further away from the Sun, everywhere on Earth would be cold at the same time. Summer in the northern hemisphere occurs at the same time as winter in the south, and vice-versa. It turns out that the Earth's orbit is nearly perfectly circular, and the difference between its closest point and its furthest point is very small. In actual fact, the Earth is furthest away from the Sun in June when it is summer in the northern hemisphere. The Earth is a very special planet in many ways. Just as Earth's unique atmosphere and its distance from the Sun work together to make Earth the right temperature to support life, Earth's orbit and its tilt work together to create the seasons. The tilt of Earth's rotational axis and the Earth's orbit work together to create the seasons. As the Earth travels around the Sun, it remains tipped in the same direction, its axis pointing towards the star Polaris. This means that sometimes the northern half of the Earth is pointing towards the Sun (summer), and sometimes it is pointing away (winter). These points in the Earth's orbit are called solstices. The Earth's tilt remains an almost constant 23.5 degrees to the plane of the ecliptic, apart from a very very slow and tiny precession which takes place over thousands of years. Notice that when the northern hemisphere is tilted towards the Sun, the southern hemisphere is tilted away. This explains why the hemispheres have opposite seasons. The link http://en.wikipedia.org/wiki/Image:Seasonearth.png demonstrates this perfectly. Halfway between the solstices, the Earth is neither tilted directly towards nor directly away from the Sun. At these times, called the equinoxes, both hemispheres receive roughly equal amounts of sunlight. Equinoxes mark the seasons of autumn and spring and are a transition between the two more extreme seasons, summer and winter. There is no black magic or mumbo-jumbo to all this, Gerald. If you point your backside towards the fire it will get hot - if you point it away at an angle it won't get so warm. Even first year primary school children can understand this simple 3-dimensional trick of the light, so it is is difficult to understand why you drag ancient figures and heliocentricity into your endless drivel. We all KNOW the earth orbits around the sun. We all KNOW its axis is tilted and that combined with its 12 month orbit this yields the seasons. You can dress the mechanism up any way you want; it doesn't change what is fundamentally a very simple concept. But if you feel the need to challenge any part of the above explanation (an explanation that is shared by the same scientists who successfully send probes with pinpoint accuracy to the furthermost planets of our Solar System) then please state clearly where you think the errors lie. I wait with baited breath. |
#10
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![]() TeaTime wrote: "oriel36" wrote in message ups.com... SNIP http://en.wikipedia.org/wiki/Image:Seasonearth.png What is a little (unintentionally) off-putting with those correct images is that it gives no real idea of the Earth's change in orbital orientation and it can be easily fixed by not showing the difference between the orbital shadow and solar radiation facing in the same direction,at least in the June and Dec images. The only thing 'wrong' with the presentation of those images, in an astronomical sense, is that they show the Earth with its polar axis vertical rather than at 23.5 degrees to the vertical. The shadow and illuminated portions are precisely what happens in reality. Funny,funny,funny !. Keeping the Earth's orientation fixed to Polaris and allowing the Sun to drift up and down against the horizon denoting a variable axial tilt to the Sun is remarkable in an era which requires a clear conception of the relationship between axial and orbital motions and the consequences for climate and meteorology. The images from Wikipedia are fine apart from a minor adjustment which could be made to demonstrate the global asymmetry between June and December in terms of the Earth's orbital position and the direction from which it receives solar radiation - http://en.wikipedia.org/wiki/Image:Seasonearth.png Celestial sphere geometers are inclined to construct a variable axial tilt to the imaginary orbital plane whereas a more accurate view allows the orbital path to generate the drift in the orbital shadow against fixed axial orientation. I well understand just how established the variable inclination is and do not unduly criticise anyone for taking a fresh look at what causes global climate and then what causes hemispherical weather patterns.It is well worth the effort. |
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