維基百科

File:N pole precession.png

原本檔案 ‎（1,248 × 1,248 像素，檔案大細：693 KB ，MIME類型：image/png）

摘要

描述
English: The outer line with timescale shows the projection of the precession path of the north pole of the Earth on the fixed sky of the epoch J2000.0 for the time interval from 48000 BCE to 52000 CE. The inner line shows the projection of the precession path of the north pole of the Earth's orbit for the same time interval. The dependencies ψA and ωA are used for the precession of the Earth rotation, the dependencies PA and QA are used for the precession of the ecliptic [1]. The white plus indicates the direction of the north pole of the invariable plane [2]. A cyan grid indicates an ecliptic coordinate system and yellow indicates the equatorial coordinate system for the epoch J2000.0. The stars are shown no darker than the magnitude 5.
日期
來源 自己作品
作者 Voproshatel

協議

我，呢份作品嘅作者，決定用以下許可發佈呢件作品：
Creative Commons CC-Zero This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication.
The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.

  1. ↑ Vondrák, J. (2011-10-01). "New precession expressions, valid for long time intervals". Astronomy & Astrophysics 534: A22. DOI:10.1051/0004-6361/201117274. ISSN 0004-6361.
  2. ↑ Souami, D. (2012-07-01). "The solar system’s invariable plane". Astronomy & Astrophysics 543: A133. DOI:10.1051/0004-6361/201219011. ISSN 0004-6361.

Captions

Add a one-line explanation of what this file represents
The projection of the precession path of the North Pole on the fixed sky of the epoch J2000.0 for the time interval from 48000 BCE to 52000 CE.

Items portrayed in this file

圖中顯示嘅係

成立日

23 1 2023

MIME 類型

image/png

檔案歷史

撳個日期／時間去睇響嗰個時間出現過嘅檔案。

日期／時間縮圖尺寸用戶註解
現時2023年1月23號 (一) 08:50響2023年1月23號 (一) 08:50嘅縮圖版本1,248 × 1,248（693 KB）VoproshatelUploaded own work with UploadWizard

以下嘅1版用到呢個檔：

全域檔案使用情況

下面嘅維基都用緊呢個檔案：

睇呢個檔案嘅更多全域使用情況。

Metadata

呢個檔案有額外嘅資料。佢應該係數碼相機或者掃描器整出來嘅。如果佢整咗之後畀人改過，裏面嘅資料未必同改過之後相符。

由「https://zh-yue.wikipedia.org/wiki/File:N_pole_precession.png」收