The nodes are points at which the Moon's orbit crosses the ecliptic. The Moon crosses the same node every 27.2122 days, an interval called the draconic month.
thank you for the animation. This is exactly the type of explaination that i was in search, although an complex and difficulty topic, i could make my head around understand enough to satisfy my curiosity of why we don't have eclipses twice an year.
A apresentação é muito boa mas falta uma melhor detalhamento dos alimentos modos e os eclipse assim daria para perceber que e possível sim ter dois até três eclipse solares por ano dois parcial e um total , o nó da eclpta se desloca uma média de 19 dias para trás e relação a um ano e a dois nós e a lua cheia e a nova mas próxima do nó ocorre eclipse.
This is the shortest of the four types of months: Draconic, Sidereal, Tropical, and Synodic. This Draconic month is the time it takes for the moon to go from one node back to meet that same node again. It is a short month because the nodes precess, or move opposite to the Moon's direction letting them run into each other a little before the Moon has completed one full revolution of the Earth with respect to the background of stars. That's the Sidereal month.
Your animation has many good points. The number of moon orbits of 12 per year is about right. But: 1. the earth is show spinning at 1/10 the rate it should. The earth is show n only revolving ~36 times in its orbit round the sun. The background starfield should be that of the Autumn showing Pisces and Pegasus. The depiction of 18.75 year cycle of the precession of the lunar orbit shown at the Autumn Equinox is strange the revolutions of the earth in that compressed timeframe should be a blur. The number of lunar orbits in 18.75 years is 229 . 229 orbits in 30 seconds is about 7 per second!
@@pulkit4975 Right. The Metonic cycle was developed by ancient cultures including the Greeks (Meton was an Athenian), Babylonians, Hebrews, and also most likely the people of Chaco Canyon and the Polynesians. The goal was to meld lunar and solar observations. But they are very close.
Absolutely phenomenal animations! How does this 18.6 year cycle affect the tides? I'm having a very hard time visualizing it (in the context of the new NASA study about the moon's cycle contributing to coastal flooding in the 2030s)
NOAA uses "tidal epochs" of 19 years or so, the National Tidal Datum Epoch (NTDE), to set the chart "datum," which is sea level or mean lower low water. Currently we're still using the 1983-2001 epoch which is set to be revised in 2026. The reason for averaging the datum over 19 years is that during this time the moon's orbit will go through the cycle displayed in the video. This has an effect of varying sea level to a degree, so averaging it gives us a usable reference. Local charts use the same datum as your tide book. Both will ideally be updated with the new datum.
Yes you are (approximately) correct and I think that is what Stermen indicated. Actually the Moon's inclination to the Ecliptic continually changes and has a minimum of 4 deg 58' 59" and a maximum of 5 deg 18' 11". with an average of 5 deg 8' 46" or 5.15 deg. These are my calculation for the 21st century.
The tilt of the Earths axis should be constant but in your animation it draws up the cone. So the northern hemisphere has the summer season all year long according to your a imation. It a big big biiiig mistake!
So does the moon spin on its on axis's? I thought they were tidal locked with each other. The earth and moon should both be spinning in your animation but only the earth is rotating on its axis's.
The moon is rotating. It rotates once per revolution around earth. That's why we always see the same side of it. Slow down the video, and observe it's rotation.
It's not clear in the animation, but the moon is tilted 1.5 degrees to its orbital path, and its axis is always pointing in the same direction while orbiting - just like earth's axis does. That's what makes the extremely slow rotation necessary to keep the same face pointed inward (tidally locked). Imagine how the moon's entire surface would be revealed to earth if it orbited with no rotation while always tilted in the same direction.
After searching for hours, I still cannot figure out why the moon path is at the north at ascending node. And why would the moon is at the south at the descending node? If the nodes are the intersection points of moon orbit and the ecliptic orbit, how would the moon appears at the highest or lowest point in the sky during the nodes?
How exactly is the Moon orbiting perfectly year after year without lagging behind the Earth? Is it attached with a string? Thanks for showing that the heliocentric model is a lie, good work.
thank you for the animation. This is exactly the type of explaination that i was in search, although an complex and difficulty topic, i could make my head around understand enough to satisfy my curiosity of why we don't have eclipses twice an year.
A apresentação é muito boa mas falta uma melhor detalhamento dos alimentos modos e os eclipse assim daria para perceber que e possível sim ter dois até três eclipse solares por ano dois parcial e um total , o nó da eclpta se desloca uma média de 19 dias para trás e relação a um ano e a dois nós e a lua cheia e a nova mas próxima do nó ocorre eclipse.
Yes I was searching for this kind of animation.Was finding hard to imagine how eclipses occure.
This is the shortest of the four types of months: Draconic, Sidereal, Tropical, and Synodic. This Draconic month is the time it takes for the moon to go from one node back to meet that same node again. It is a short month because the nodes precess, or move opposite to the Moon's direction letting them run into each other a little before the Moon has completed one full revolution of the Earth with respect to the background of stars. That's the Sidereal month.
Your animation has many good points. The number of moon orbits of 12 per year is about right.
But: 1. the earth is show spinning at 1/10 the rate it should. The earth is show n only revolving ~36 times in its orbit round the sun.
The background starfield should be that of the Autumn showing Pisces and Pegasus.
The depiction of 18.75 year cycle of the precession of the lunar orbit shown at the Autumn Equinox is strange the revolutions of the earth in that compressed timeframe should be a blur. The number of lunar orbits in 18.75 years is 229 . 229 orbits in 30 seconds is about 7 per second!
This is a good dream like animation. Thank you very much.
God Thank you this is excactly what I needed!!!
Excellent demonstration!
A full procession of the moon's orbit (the 18.6 years) is called a "Metonic cycle" and was well known already in ancient times.
precession : )
Metonic is 19 years.. when the Moon Phases repeat. Different than the nodal cycle IMO
@@pulkit4975 Right. The Metonic cycle was developed by ancient cultures including the Greeks (Meton was an Athenian), Babylonians, Hebrews, and also most likely the people of Chaco Canyon and the Polynesians. The goal was to meld lunar and solar observations. But they are very close.
Absolutely phenomenal animations! How does this 18.6 year cycle affect the tides? I'm having a very hard time visualizing it (in the context of the new NASA study about the moon's cycle contributing to coastal flooding in the 2030s)
NOAA uses "tidal epochs" of 19 years or so, the National Tidal Datum Epoch (NTDE), to set the chart "datum," which is sea level or mean lower low water. Currently we're still using the 1983-2001 epoch which is set to be revised in 2026. The reason for averaging the datum over 19 years is that during this time the moon's orbit will go through the cycle displayed in the video. This has an effect of varying sea level to a degree, so averaging it gives us a usable reference. Local charts use the same datum as your tide book. Both will ideally be updated with the new datum.
The moons orbit is only tilted 5.05° the earth orbit around the sun not the earths axial tilt
Yes you are (approximately) correct and I think that is what Stermen indicated. Actually the Moon's inclination to the Ecliptic continually changes and has a minimum of 4 deg 58' 59" and a maximum of 5 deg 18' 11". with an average of 5 deg 8' 46" or 5.15 deg. These are my calculation for the 21st century.
Good animation albeit simplified model - the common M/E orbit is the barycentre of course - and we rotate around it.
Very well done.
Thanks for you presentation... But it is much better without the sound and with 0,25 speed...
Super animation easy to understand
Fabulous
Thank you for this. Would only add the yellow line moving up and down for the solstices and equinox.
The visual of the simulation is exceptional. The Earth's rotation though to me seems slower than what I'm imagining it ought to be...?
I think the physical values such as velocity and tilt are deliberately exaggerated for a more clear demonstration .
Thank you
Why is there a skull and crossbones moving around with the moon?
Wondered the same. Draconic ...dracula perhaps?
Why wouldn't there be?
Rahu ketu 😂
In the animation, it looks like the nodes aren’t actually always positioned on the points of intersection of the two planes? What am I missing here?
Yeah i double that
how long does it take for the moon to spin around the earth?
a moonth.....
The tilt of the Earths axis should be constant but in your animation it draws up the cone. So the northern hemisphere has the summer season all year long according to your a imation. It a big big biiiig mistake!
I'm seeing winter in the northern hemisphere around the 0:15 mark and summer around the 0:35 mark. Looks correct to me.
Siva linga shape
what software was used to make this model? Nice job
So does the moon spin on its on axis's? I thought they were tidal locked with each other. The earth and moon should both be spinning in your animation but only the earth is rotating on its axis's.
The moon is rotating. It rotates once per revolution around earth. That's why we always see the same side of it. Slow down the video, and observe it's rotation.
It's not clear in the animation, but the moon is tilted 1.5 degrees to its orbital path, and its axis is always pointing in the same direction while orbiting - just like earth's axis does. That's what makes the extremely slow rotation necessary to keep the same face pointed inward (tidally locked). Imagine how the moon's entire surface would be revealed to earth if it orbited with no rotation while always tilted in the same direction.
After searching for hours, I still cannot figure out why the moon path is at the north at ascending node. And why would the moon is at the south at the descending node?
If the nodes are the intersection points of moon orbit and the ecliptic orbit, how would the moon appears at the highest or lowest point in the sky during the nodes?
Please make orbit plane of planets
Can you add eccentricity of both orbits and days of the year?
Why the earth's rotational axis not tilting?
Excuse me? The axis is already tilted.
How exactly is the Moon orbiting perfectly year after year without lagging behind the Earth? Is it attached with a string? Thanks for showing that the heliocentric model is a lie, good work.
this is where physics fails...
Utter bullshit, if the moon orbits like this we would see a horizontal shadow instead of a vertical one. The moon would look completely different.