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File:Precession and seasons.svg

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這個文件來自維基共享資源
维基百科,自由的百科全书

原始文件 (SVG文件,尺寸为787 × 639像素,文件大小:54 KB)


摘要

描述
English: Effects of precession on the seasons (using the Northern Hemisphere terms).
日期
来源 自己的作品
作者 Krishnavedala
SVG开发
InfoField
 
SVG的源代码为有效代码.
 
矢量图使用LaTeX创作 and converted to SVG using dvisvgm
源代码
InfoField

SVG code

Source Code
\documentclass[12pt,border=1pt,crop,multi=false,tikz,class=scrartcl]{standalone}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{lmodern}
\usepackage{mathtools}
\usepackage{setspace}
 
\usetikzlibrary{arrows,shapes,calc,positioning,fit,decorations.markings}

\begin{document}
\sffamily
\footnotesize
\setstretch{1}
  \begin{tikzpicture}[>=latex',semithick,auto,remember picture]
  \node at (-7,0) (o1) {\begin{tikzpicture}[scale=1,>=latex',
  decoration={markings, mark=at position 0.85 with {\arrow[scale=3]{>} } }]
  	\draw [fill=cyan!30,opacity=.6,postaction={decorate}] (0,0) ellipse (2.5981 and 3);
	\draw (0,-3) -- (0,3) (-2.25,-1.5) -- (2.25,-1.5);
	\draw [fill=yellow] (0,-1.5) circle (.3);
	\draw [->,red,ultra thick] (-.5,-3) -- (.5,-3);
	\draw [->,red,ultra thick] (-.5,3) -- (.5,3);
	\draw [->,red,ultra thick] (-2.75,-1.5) -- (-1.75,-1.5);
	\draw [->,red,ultra thick] (1.75,-1.5) -- (2.75,-1.5);
	\draw [fill=blue] 
		(0,-3) circle (.2)
		(0,3) circle (.2)
		(-2.25,-1.5) circle (.2)
		(2.25,-1.5) circle (.2);
	\node [text centered] at (-1.2,.8) {Spring};
	\node [text centered] at (1.2,.8) {Winter};
	\node [text centered] at (-1,-2) {Summer};
	\node [text centered] at (1,-2) {Fall};
	\node [text centered, text width=5em] at (0,3.8) {Spring Equinox};
	\node [text centered, text width=5em] at (0,-3.8) {Fall Equinox};
	\node [text centered, text width=5em] at (-3.5,-1.5) {Summer Solstice};
	\node [text centered, text width=5em] at (3.5,-1.5) {Winter Solstice};
	\end{tikzpicture}
	};
    \node [text centered,text width=16em] at (-7,-4.7) (t1) {\normalsize 5000 years ago and 15000 years from now};
    \node at (7,0) (o2) {\begin{tikzpicture}[scale=1,>=latex',
  decoration={markings, mark=at position 0.85 with {\arrow[scale=3]{>} } }]
  	\draw [fill=cyan!30,opacity=.6,postaction={decorate}] (0,0) ellipse (2.5981 and 3);
	\draw (0,-3) -- (0,3) (-2.25,-1.5) -- (2.25,-1.5);
	\draw [fill=yellow] (0,-1.5) circle (.3);
	\draw [<-,red,ultra thick] (-.5,-3) -- (.5,-3);
	\draw [<-,red,ultra thick] (-.5,3) -- (.5,3);
	\draw [<-,red,ultra thick] (-2.75,-1.5) -- (-1.75,-1.5);
	\draw [<-,red,ultra thick] (1.75,-1.5) -- (2.75,-1.5);
	\draw [fill=blue] 
		(0,-3) circle (.2)
		(0,3) circle (.2)
		(-2.25,-1.5) circle (.2)
		(2.25,-1.5) circle (.2);
	\node [text centered] at (-1.2,.8) {Fall};
	\node [text centered] at (1.2,.8) {Summer};
	\node [text centered] at (-1,-2) {Winter};
	\node [text centered] at (1,-2) {Spring};
	\node [text centered, text width=5em] at (0,3.8) {Fall Equinox};
	\node [text centered, text width=5em] at (0,-3.8) {Spring Equinox};
	\node [text centered, text width=5em] at (-3.5,-1.5) {Winter Solstice};
	\node [text centered, text width=5em] at (3.5,-1.5) {Summer Solstice};
	\end{tikzpicture}
	};
  \node [text centered,text width=16em] at (7,-4.7) (t2) {\normalsize 5000 years from now};
  \node at (0,-4.5) (o3) {\begin{tikzpicture}[scale=1,>=latex',
  decoration={markings, mark=at position 0.85 with {\arrow[scale=3]{>} } }]
  	\draw [fill=cyan!30,opacity=.6,postaction={decorate}] (0,0) ellipse (2.5981 and 3);
	\draw (0,-3) -- (0,3) (-2.25,-1.5) -- (2.25,-1.5);
	\draw [fill=yellow] (0,-1.5) circle (.3);
	\draw [->,red,ultra thick] (0,-3.5) -- (0,-2.5);
	\draw [->,red,ultra thick] (0,2.5) -- (0,3.5);
	\draw [->,red,ultra thick] (-2.25,-2) -- (-2.25,-1);
	\draw [->,red,ultra thick] (2.25,-2) -- (2.25,-1);
	\draw [fill=blue] 
		(0,-3) circle (.2)
		(0,3) circle (.2)
		(-2.25,-1.5) circle (.2)
		(2.25,-1.5) circle (.2);
	\node [text centered] at (-1.2,.8) {Winter};
	\node [text centered] at (1.2,.8) {Fall};
	\node [text centered] at (-1,-2) {Spring};
	\node [text centered] at (1,-2) {Summer};
	\node [text centered, text width=5em] at (0,3.8) {Winter Solstice};
	\node [text centered, text width=5em] at (0,-3.8) {Summer Solstice};
	\node [text centered, text width=5em] at (-3.5,-1.5) {Spring Equinox};
	\node [text centered, text width=5em] at (3.5,-1.5) {Fall Equinox};
	\end{tikzpicture}
	};
  \node [text centered,text width=16em] at (0,-9.2) (t3) {\normalsize Earth's orbit 10000 years from now};
  \node at (0,4.5) (o4) {\begin{tikzpicture}[scale=1,>=latex',rotate=-18,
  decoration={markings, mark=at position 0.85 with {\arrow[scale=3]{>} } }]
  	\draw [fill=cyan!30,opacity=.6,postaction={decorate}] (0,0) ellipse (2.5981 and 3);
	\draw (0,-3) -- (0,3) (-2.25,-1.5) -- (2.25,-1.5);
	\draw [fill=yellow] (0,-1.5) circle (.3);
	\draw [<-,red,ultra thick] (0,-3.5) -- (0,-2.5);
	\draw [<-,red,ultra thick] (0,2.5) -- (0,3.5);
	\draw [<-,red,ultra thick] (-2.25,-2) -- (-2.25,-1);
	\draw [<-,red,ultra thick] (2.25,-2) -- (2.25,-1);
	\draw [fill=blue] 
		(0,-3) circle (.2)
		(0,3) circle (.2)
		(-2.25,-1.5) circle (.2)
		(2.25,-1.5) circle (.2);
	\node [text centered] at (-1.2,.8) {Summer};
	\node [text centered] at (1.2,.8) {Spring};
	\node [text centered] at (-1,-2) {Fall};
	\node [text centered] at (1,-2) {Winter};
	\node [text centered, text width=5em] at (0,3.8) {Summer Solstice};
	\node [text centered, text width=5em] at (0,-3.8) {Winter Solstice};
	\node [text centered, text width=5em] at (-3.5,-1.5) {Fall Equinox};
	\node [text centered, text width=5em] at (3.5,-1.5) {Spring Equinox};
	\end{tikzpicture}
	};
  \node [text centered,text width=8em] at (-2.5,7) (t4) {\normalsize Earth's \\orbit today};
  \draw [->,ultra thick] (o1.north) .. controls ++(0,1.5) and ++(-1.5,0) .. (t4.west);
  \draw [->,ultra thick,red] (-7.9,7.5) -- (-8.9,7.5);
  \node [text centered,text width=11em] at (-8.4,6) {\normalsize Direction North Pole points\\(actually inclined only 23.5$^\circ$)};
  \draw [->,ultra thick] (o4.30) ++(-1,0) .. controls ++(1.5,0) and ++(0,1.5) .. (o2.north)
  	node [pos=.5,above right,text centered,text width=8em] {\normalsize Precession direction};
  \draw [->,ultra thick] (t2.south) .. controls ++(0,-1.5) and ++(1.5,0) .. (t3.north east)
  	node [pos=.5,right=2em,text centered,text width=8em] {\normalsize Indicated seasons are for northern hemisphere};
  \draw [->,ultra thick] (t3.west) ++(.8,0) .. controls ++(-1.5,0) and ++(0,-1.5) .. (t1.south);
  \end{tikzpicture}
\end{document}

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当前2015年4月19日 (日) 15:342015年4月19日 (日) 15:34版本的缩略图787 × 639(54 KB)Krishnavedalafrom the corrected source-code
2015年1月8日 (四) 15:292015年1月8日 (四) 15:29版本的缩略图787 × 645(69 KB)Krishnavedala{{Information |Description ={{en|1=Effects of precession on the seasons (using the Northern Hemisphere terms).}} |Source ={{own}} |Author =Krishnavedala |Date =2015-01-08 |Permission = |other_vers...

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