# Tag Info

## New answers tagged fundamental-astronomy

0

When talking about the longitude of ascending node you must be very careful to define the reference plane that you are using. As you state, due to the Earth's axial precession, the First Point of Aries moves along the ecliptic over ~26,000 years. This is because the celestial equator is slowly precessing about the ecliptic. Now, in the case of the orbital ...

2

The Earth does spin like an unbalanced top. The Earth's rotation axis is not fixed. It instead moves in a complex manner due to a combination of external torques exerted by the Moon and Sun, a torque-free nutation due to the oblate shape of the Earth, and also due to changes on and in the Earth. The torque-induced motions are called precession and nutation, ...

16

It wouldn't be too apparent, but there are a few objects that you can see in good viewing conditions with the naked eye that would disappear. Here they are in order of brightness. I marked the objects in a reddish color. The Large Magellanic Cloud, apparent magnitude 0.9, located in the constellation Dorado. Only visible from the southern hemisphere. ...

23

I feel sure this is a repeat, but couldn't immediately find it. The only things in the night sky we can see (with the naked eye) that are not part of our own Galaxy are (on a good night) the Andromeda galaxy and the Large and small Magellanic clouds. Every individual star brighter than $V=6$ and visible to the naked eye is in the Milky Way. So it would ...

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