You are now in the directory "astro".
Here are the one-line descriptions for each items in this directory:
ephem-4.28: an interactive terminal-based astronomical ephemeris program luna-1.9: Display her phase. sattrack-3.1.6: Real-time satellite tracking and orbit propagation program. stars-1.0: Star field demo. sunclock-1.3: Shows which portion of the Earth's surface is illuminated by the Sun. xearth-1.0: Set the root window to the image of earth. xephem-3.0: an interactive astronomical ephemeris program xphoon-91.9.18: Set the root window to the moon in its current phase