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Post by johnofgwent on Dec 10, 2022 20:58:44 GMT
Back in the seventies studying physical chemistry we did a bit of physical cosmology. One of the reasons for leap seconds is the fact that the moon’s gravitational pull on the water in our oceans which causes the height difference as the earth rotates through it causes a slight drag on the earth’s mass to say nothing of erosion of course.
As a direct result of that drag, I was told, the day is longer than when Chaeops ordered the Great Pyramid built.
Another thing to note. The moon is slowly moving away from the earth.
Those who question the moon landings might care to note that two young ladies pressed me into assisting them with a bit of a science project back in the mid 70s. We were one of many who did this. After getting clearance from the CAA, the Astronomical Society shone a green laser straight at the moon through a telescope on one elevated location, pointed another some miles away at the surface of the moon and looked for the reflection.
By pulsing the light and varying the intervals and comparing transmission and reception in real time through phone lines the distance was measured apparently to a couple of centimetres.
As the only heavenly bodies I had any interest in were worn by the two individuals who sought my help solely because I was using a spectrophotometer a lot, and knew how to use its interfaces, I thought no more of this beyond ‘hey, it works, that’s cool’
But some time during the pox lockdown I watched a sort of sky at night show, but longer, with Brian cox and this woman who talked about these very experiments done decades ago which were recently repeated and showed the moon was further from the earth than it was when the astronauts landed in Apollo 11
This means future generations will not see the diamond ring effect in eclipses as the moon will be further out and provide a more total exclusion of the suns disc.
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Post by Montegriffo on Dec 10, 2022 22:12:03 GMT
Back in the seventies studying physical chemistry we did a bit of physical cosmology. One of the reasons for leap seconds is the fact that the moon’s gravitational pull on the water in our oceans which causes the height difference as the earth rotates through it causes a slight drag on the earth’s mass to say nothing of erosion of course. As a direct result of that drag, I was told, the day is longer than when Chaeops ordered the Great Pyramid built. Another thing to note. The moon is slowly moving away from the earth. Those who question the moon landings might care to note that two young ladies pressed me into assisting them with a bit of a science project back in the mid 70s. We were one of many who did this. After getting clearance from the CAA, the Astronomical Society shone a green laser straight at the moon through a telescope on one elevated location, pointed another some miles away at the surface of the moon and looked for the reflection. By pulsing the light and varying the intervals and comparing transmission and reception in real time through phone lines the distance was measured apparently to a couple of centimetres. As the only heavenly bodies I had any interest in were worn by the two individuals who sought my help solely because I was using a spectrophotometer a lot, and knew how to use its interfaces, I thought no more of this beyond ‘hey, it works, that’s cool’ But some time during the pox lockdown I watched a sort of sky at night show, but longer, with Brian cox and this woman who talked about these very experiments done decades ago which were recently repeated and showed the moon was further from the earth than it was when the astronauts landed in Apollo 11 This means future generations will not see the diamond ring effect in eclipses as the moon will be further out and provide a more total exclusion of the suns disc. It's the other way around. As the moon moves further away it won't be big enough to blank out the sun. In about 600 million years there will be no more total eclipses. |
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Post by johnofgwent on Dec 11, 2022 7:54:38 GMT
Back in the seventies studying physical chemistry we did a bit of physical cosmology. One of the reasons for leap seconds is the fact that the moon’s gravitational pull on the water in our oceans which causes the height difference as the earth rotates through it causes a slight drag on the earth’s mass to say nothing of erosion of course. As a direct result of that drag, I was told, the day is longer than when Chaeops ordered the Great Pyramid built. Another thing to note. The moon is slowly moving away from the earth. Those who question the moon landings might care to note that two young ladies pressed me into assisting them with a bit of a science project back in the mid 70s. We were one of many who did this. After getting clearance from the CAA, the Astronomical Society shone a green laser straight at the moon through a telescope on one elevated location, pointed another some miles away at the surface of the moon and looked for the reflection. By pulsing the light and varying the intervals and comparing transmission and reception in real time through phone lines the distance was measured apparently to a couple of centimetres. As the only heavenly bodies I had any interest in were worn by the two individuals who sought my help solely because I was using a spectrophotometer a lot, and knew how to use its interfaces, I thought no more of this beyond ‘hey, it works, that’s cool’ But some time during the pox lockdown I watched a sort of sky at night show, but longer, with Brian cox and this woman who talked about these very experiments done decades ago which were recently repeated and showed the moon was further from the earth than it was when the astronauts landed in Apollo 11 This means future generations will not see the diamond ring effect in eclipses as the moon will be further out and provide a more total exclusion of the suns disc. It's the other way around. As the moon moves further away it won't be big enough to blank out the sun. In about 600 million years there will be no more total eclipses. I must lay off the gin while logged in here. You’re right of course. The impact is the same though, our descendants will never see what we have. Mind you, when I went to Cornwall in 1999, it was magnificently set for a clear view then Sky News persuaded some tossers to do a rain dance on a Neolithic monument near Marazion and within minutes rain clouds started to form. NEVER take the piss out of ancient religion especially when standing on the burial grounds they used to perform their rituals. Having said that, the shadow of the moon racing across the clouds above your head was awesome and terrifying at the same moment. You had to be there but I shit you not if four dodgy guys on horses and a chap in a white robe with wings and a trumpet had come walking up the hill that overlooked the River Tamar I would not have been unduly surprised |
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Post by Montegriffo on Dec 11, 2022 8:24:27 GMT
It's the other way around. As the moon moves further away it won't be big enough to blank out the sun. In about 600 million years there will be no more total eclipses. I must lay off the gin while logged in here. You’re right of course. The impact is the same though, our descendants will never see what we have. Mind you, when I went to Cornwall in 1999, it was magnificently set for a clear view then Sky News persuaded some tossers to do a rain dance on a Neolithic monument near Marazion and within minutes rain clouds started to form. NEVER take the piss out of ancient religion especially when standing on the burial grounds they used to perform their rituals. Having said that, the shadow of the moon racing across the clouds above your head was awesome and terrifying at the same moment. You had to be there but I shit you not if four dodgy guys on horses and a chap in a white robe with wings and a trumpet had come walking up the hill that overlooked the River Tamar I would not have been unduly surprised I saw it in Reims on the way to Grenoble for the European juggling convention. Cloudy there too. |
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Post by Orac on Dec 13, 2022 16:43:04 GMT
It's slightly more complicated than the traditional school simplified explanation you might have heard - that being, the sea rises because the gravity of the moon pulls it 'up'. High tide on the moon's side is not a really consequence of the moon pulling the sea up (say) 60 ft. The moon pulls the sea around a fair bit, but, if it could have that sort of effect then liquids on earth would be completely out of control lol. It's all to do with fluids bunching up as they are dragged about by the moon - mostly sideways - and hitting continents. The clue is in the med that has no tide because water can't be pulled into it to do the bunch up. It's one of those simple explanations that's technically true (the bunching is caused by water being attracted to the moon) but can also be somewhat deceptive.
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Post by Red Rackham on Dec 20, 2022 2:42:48 GMT
I saw it in Reims on the way to Grenoble for the European juggling convention. Cloudy there too. LOL. We once camped near Reims, motorbikes parked up next to our small tent. We were woken because our sleeping bags were the only things that were keeping us above water. We were camping overnight on an approved site that we payed for, and it flooded. That was the begining of that particular tour, we didn't bother paying for camp sites after that. But it was a brilliant two weeks of freedom to let off steam. |
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Post by Toreador on Dec 20, 2022 7:50:55 GMT
I saw it in Reims on the way to Grenoble for the European juggling convention. Cloudy there too. LOL. We once camped near Reims, motorbikes parked up next to our small tent. We were woken because our sleeping bags were the only things that were keeping us above water. We were camping overnight on an approved site that we payed for, and it flooded. That was the begining of that particular tour, we didn't bother paying for camp sites after that. But it was a brilliant two weeks of freedom to let off steam. Happened to about 30 of us on the first night of school camp. Camp was on the slopes of the highest cliff on the south coast, Golden Cap. We'd arrived late, erected the (army) tents but didn't dig a trench around them to divert the water; everyone of us soaked to the skin. |
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Post by patman post on Jan 10, 2023 12:56:59 GMT
Back in the seventies studying physical chemistry we did a bit of physical cosmology. One of the reasons for leap seconds is the fact that the moon’s gravitational pull on the water in our oceans which causes the height difference as the earth rotates through it causes a slight drag on the earth’s mass to say nothing of erosion of course. As a direct result of that drag, I was told, the day is longer than when Chaeops ordered the Great Pyramid built. Another thing to note. The moon is slowly moving away from the earth. Those who question the moon landings might care to note that two young ladies pressed me into assisting them with a bit of a science project back in the mid 70s. We were one of many who did this. After getting clearance from the CAA, the Astronomical Society shone a green laser straight at the moon through a telescope on one elevated location, pointed another some miles away at the surface of the moon and looked for the reflection. By pulsing the light and varying the intervals and comparing transmission and reception in real time through phone lines the distance was measured apparently to a couple of centimetres. As the only heavenly bodies I had any interest in were worn by the two individuals who sought my help solely because I was using a spectrophotometer a lot, and knew how to use its interfaces, I thought no more of this beyond ‘hey, it works, that’s cool’ But some time during the pox lockdown I watched a sort of sky at night show, but longer, with Brian cox and this woman who talked about these very experiments done decades ago which were recently repeated and showed the moon was further from the earth than it was when the astronauts landed in Apollo 11 This means future generations will not see the diamond ring effect in eclipses as the moon will be further out and provide a more total exclusion of the suns disc. It's the other way around. As the moon moves further away it won't be big enough to blank out the sun. In about 600 million years there will be no more total eclipses. Isn't the whole universe said to be expanding?
If that's so, won't the Earth, Moon, Sun, etc, all be moving further away from each other? And if that happens won't the Sun also appear smaller thus allowing a "smaller" Moon to still eclipse it given all the right parameters...?
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Post by Montegriffo on Jan 10, 2023 13:06:11 GMT
It's the other way around. As the moon moves further away it won't be big enough to blank out the sun. In about 600 million years there will be no more total eclipses. Isn't the whole universe said to be expanding?
If that's so, won't the Earth, Moon, Sun, etc, all be moving further away from each other? And if that happens won't the Sun also appear smaller thus allowing a "smaller" Moon to still eclipse it given all the right parameters...?
Only if the ratio remains the same. In a giant cosmic coincidence human life happens to be on Earth at a time when the Sun is 400 times larger than the moon while also being 400 times further away. This is happening for an incredibly short amount of time during our Sun's brief lifetime of around 9 billion years. |
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