RA & DEC with the current EPOCH?

[AstroImageJ / AstroCC]

• GUI Coordinate Converter
• http://www.astro.louisville.edu/software/astroimagej/
  (built-in plug-ins)
• http://www.astro.louisville.edu/software/astrocc/

[PyEphem]

• A python package for performing astrometric calculations
• http://rhodesmill.org/pyephem/

Update your MacPorts :D

剛剛有人問我說要怎樣更新 MacPorts 裝好的套件，

其實最簡單的作法就是以下三步驟：

1. sudo port selfupdate
2. sudo port outdated
3. sudo port upgrade outdated

至於其他指令，
我還是建議去官方網頁看說明手冊～

http://guide.macports.org/

回答完畢！

WCSTools Quick Installation

I know someone will ask me about this very soon,
so I write down my steps here:

• Visit http://tdc-www.harvard.edu/wcstools/
• Download the source code via http://tdc-www.harvard.edu/software/wcstools/wcstools-3.8.7.tar.gz
• Switch to ROOT, then copy the installing file to /usr/local/bin
• Unzipped it, removed the GZ file, and jumped into the new folder
• Run `make all`
• Edit your startup file (e.g: .profile) and insert the words below:
• export WCSTOOLS="/usr/local/bin/wcstools"
• export PATH="/usr/local/bin/wcstools/bin:$PATH"
• Restart your terminal and you will find those WCSTools commands :P

Enjoy it!