Astrology signs?

As already said, the symbols are in both package wasysym and package marvosym. They can also be found in the The Comprehensive LaTeX Symbol List.

\documentclass{article}

\usepackage[T1]{fontenc}
\usepackage{lmodern}

\usepackage{wasysym}
\usepackage{marvosym}

\usepackage[unicode,psdextra]{hyperref}[2012/08/13]%
% [2012/09/04]% v6.83e contains fix for \capricornus
\usepackage{bookmark}

\newcommand*{\entry}[2]{%
  \pdfbookmark{%
    \csname #1\endcsname/\csname #2\endcsname\space
    (\textbackslash #1/\textbackslash #2)%
  }{#1/#2}%
  \ttfamily \textbackslash #1
  & \csname #1\endcsname
  & \csname #2\endcsname
  & \ttfamily \textbackslash #2
  \tabularnewline
}

\begin{document}
\begin{tabular}{@{}ll|ll@{}}
\multicolumn{2}{@{}r|}{\textsf{wasysym}}&
\multicolumn{2}{l@{}}{\textsf{marvosym}}\\
\hline
\entry{aries}{Aries}
\entry{taurus}{Taurus}
\entry{gemini}{Gemini}
\entry{cancer}{Cancer}
\entry{leo}{Leo}
\entry{virgo}{Virgo}
\entry{libra}{Libra}
\entry{scorpio}{Scorpio}
\entry{sagittarius}{Sagittarius}
\entry{capricornus}{Capricorn}
\entry{aquarius}{Aquarius}
\entry{pisces}{Pisces}
\end{tabular}
\end{document}

The symbols are also supported in bookmarks with package hyperref (option unicode/psdencoding=auto and option psdextra except for \capricornus that will be fixed in v6.83e:

This website Detexify² can help you to identify commands for particular latex symbols by drawing them.

The first two raised by my drawing were \capricornus from the wasysym package and \Capricorn from the marvosym package.