A Moon 'Wobble' Is Coming

[Billy_Kinetta]

Oh GAWD! I posted about the Earth wobble three months back. Now comes the moon wobble.

Soon, it will be racist to dis the wobble. One wobble to rule them all.

Brace for flooding. A moon 'wobble' is coming, NASA warns

 

[Shelzin]

Oh GAWD! I posted about the Earth wobble three months back. Now comes the moon wobble.

Soon, it will be racist to dis the wobble. One wobble to rule them all.

Brace for flooding. A moon 'wobble' is coming, NASA warns

I strongly suggest you save this thread... If it happens, they are going to say global warming did it.

 

[skye]

But not until 2030.

who will be still here by then? not moi.

 

[Dogmaphobe]

Just promise us to refrain from any threads about how Uranus wobbles.


TIA.

 

[Gracie]

But not until 2030.

who will be still here by then? not moi.

That's only 9 years away. You will be here. Unfortunately, I probably will be too.

 

[Gracie]

You are SO photogenic, Skye. Dayum.

 

[skye]

But not until 2030.

who will be still here by then? not moi.

That's only 9 years away. You will be here. Unfortunately, I probably will be too.

Yes, that's true, it's not too far away, you are right!

 

[RodISHI]

Who has been jacking around with the moon?



According to NASA Goddard's website: "The Moon always keeps the same face to us, but not exactly the same face. Because of the tilt and shape of its orbit, we see the Moon from slightly different angles over the course of a month. When a month is compressed into 24 seconds, as it is in this animation, our changing view of the Moon makes it look like it's wobbling. This wobble is called libration. The word comes from the Latin for "balance scale" (as does the name of the zodiac constellation Libra) and refers to the way such a scale tips up and down on alternating sides. The sub-Earth point gives the amount of libration in longitude and latitude. The sub-Earth point is also the apparent center of the Moon's disk and the location on the Moon where the Earth is directly overhead. The Moon is subject to other motions as well. It appears to roll back and forth around the sub-Earth point. The roll angle is given by the position angle of the axis, which is the angle of the Moon's north pole relative to celestial north. The Moon also approaches and recedes from us, appearing to grow and shrink. The two extremes, called perigee (near) and apogee (far), differ by about 14%. The most noticed monthly variation in the Moon's appearance is the cycle of phases, caused by the changing angle of the Sun as the Moon orbits the Earth. The cycle begins with the waxing (growing) crescent Moon visible in the west just after sunset. By first quarter, the Moon is high in the sky at sunset and sets around midnight. The full Moon rises at sunset and is high in the sky at midnight. The third quarter Moon is often surprisingly conspicuous in the daylit western sky long after sunrise."