\input a4_12.ltx
\usepackage{graphicx}

\ifx\pdfoutput\undefined
 \relax
\else
 \usepackage
  [bookmarks=false, pdfauthor={Jan Hollan}, pdftitle={Brno Planetarium info}]
  {hyperref}
 \usepackage{times} 
\fi

\input myhtml.lt

\begin{document}

  \newlength{\behindlogo}
  \setlength{\behindlogo}{\textwidth}
  \newlength{\logowidth}
  \setlength{\logowidth}{15mm}
  \addtolength{\behindlogo}{-1.4\logowidth}
 
\section*
 { 
  \parbox{\logowidth}
   {\ifx\pdfoutput\undefined
     \includegraphics[height=2\logowidth, width=\logowidth]{logo_boa}
    \else
     \includegraphics[height=2\logowidth, width=\logowidth]{logo_bog.pdf}
    \fi
   }
  \hfill
  \parbox{\behindlogo}
   {N. Copernicus Observatory and Planetarium in Brno \\
    \mdseries \large
    Krav\'\i{} hora 2 \\ 
    616 00 Brno, Czech Republic   \hfill  \wwwmt{e-mail@hvezdarna.cz} \\
    (use \emph{Brno Planetarium} as a short) 
   }
 } 
   
established 1954, has a lot of offers for visitors of Brno. 

\subsection*{The Planetarium}

dome with 200 seats serves mainly to school groups during the day,
but any group over 40 people can order a programme there. 
The entrance costs CZK 30 (20 for children and students, 15 for fairy tales). 
In Czech, we offer shows for children over 4 years up to programmes 
for adult people with a bit of experience in astronomy.
All these shows include an actor (astronomy teacher). 

For another languages, there is just one show (with no actor),
\emph{People and Stars}, having an English, German and French version. It
is necessary to book the programme in advance. The entrance fee is CZK 60,
groups over 15 people are welcome. The show takes 40 minutes.  A visit of
the observatory can follow. 

In the evening, there are regular astronomy shows in Wednesday and
Saturday and geography ones in Thursday. At least twice a month there
is a unique lecture on astronomy. 

\subsection*{The Observatory} 

has a unique projection apparatus, 
\emph{a heliostat, showing the Sun on the screen} 
in the lecture hall. The image is one metre
across, and shows even traces of granulation when the air is calm. 
Solar limb darkening is apparent at the first glance, 
faculae are very conspicuous, not to speak about sunspots.
Magnified thin clouds and visible convection of the air are interesting
another times. \emph{Solar spectrum} can be projected with the main  
lines being clearly visible. As the best view is from a close distance, 
a reasonable number of visitors is up to 15 in one group. 

(The same lecture hall is also used for demonstration of the laws and
phenomena of optics, for groups up to 30 people and booked in advance.) 

Most variability is offered during the \emph{observation of the evening sky}.
From October till March it takes place \emph{daily outside Sundays} 
and holidays at \emph{7 p.m.} 
During summertime it is at 9 p.m., just in September at 8 p.m., in
July and August the opening days are only Wednesday till Saturday. 

\emph{Plenty of telescopes} in several spaces, 
including a large open roof, can be employed. 
If the sky is overcast, the observatory equipment and spectra
of street lamps can be shown and a \emph{small planetarium} with 30 seats 
is used for an interactive star show. 

For groups of at least five people, a programme at the Observatory can be
ordered for any time, preferably afternoon. All of the astronomers leading
the programmes speak English, some German as well. The entrance fee is
CZK 15. 

\begin{center}
   For more information, phone, map etc. see: \\ 
     \large \http{www.hvezdarna.cz/en}
\end{center}

\end{document}