Astronomy Question?

Question

Does anyone know where I could get an asnwer to an astronomy question?
Here's my question:
Sub: Precession of the Earth

I understand that equinoxes and solstices occur earlier each year due to the precession of the earth and that the precession cycle is of 25,800 years. Does it mean that winter in the Northern hemisphere will occur in the month of June and the earth will then be at the Aphelion after 12,900 years?

Answer 1

We determine the year based on the Sun and its relationship to the Earth's tilt. Therefore the Spring Equinox, the day the Sun appears to cross the equator as it's northward bound, determines the first day of spring. The calendar has been set up to stay in synch with equinoxes and the solstices, therefore you will never have winter in July/August in the northern hemisphere. However what you do see is the Vernal Equinox slowly progressing through the constellations as the millennia go by. It is currently moving into Aquarius. This is why the "Age of Aquarius" and all that. If on the other hand we were to go by the stars to determine the year (sidereal year), then we would see the seasons slipping.

When the axis is aligned so that summer comes to the northern hemisphere while the Earth is at the Aphelion of its orbit (farthest from the Sun), then the summers will be cooler, but the winters will be milder. But when summer comes when the Earth is at its parihelion, then the summers will be hotter and the winters will be colder.

Answer 2

Try the source below.

The year is defined as the time to complete an orbit from an equinox back to the same equinox and not time to complete an orbit with respect to the stars. This means that the equinoxes do not occur earlier each year and the seasons will not drift to different months, but the stars WILL drift to other months. In the far future, Orion will be a summer constellation and Cygnus will be a winter constellation.

Answer 3

No, but only because we continue to adjust the calendar to avoid that happening. Prior to 1752, this adjustment was not made in the Gregorian calendar and an 11 day correction was required. Wednesday, September 2, 1752 was immediately followed by Thursday, September 14, 1752.

Answer 4

Moondance - Van Morrison Cosmic element - B-fifty two's Universally speaking - RHCP On Mercury - RHCP i've got faith the Earth flow under My toes - Carole King, Martika area Cowboy - Steve Miller Band area Intro - ditto i desire to make the worldwide turn around - ditto Tequila first mild - Eagles area baby - Spirit 2000 mild Years from abode - Rolling Stones Maiden of the main cancers Moon - Quicksilver Messenger provider a million/2 Moon - Janis Joplin Intergalactic Laxative - Donovan :-) Cosmic Wheels - ditto Earth sign guy - ditto

Answer 5

right on campbelp2002!

I don't think changes in the season of aphelion have anything to do with precession of the equinoxes.

Answer 6

Yes. With the magnetic shift, the seasons will shift too.