Xplns is an astronomy simulation.
You can enjoy the past and future sky on the desk top as if you have traveled all around the world. In solar system projection mode, you can examine motion of solar objects.
You can observe motion of the stars with tracking an object. The information display function let you know the rise, set and meridian time of solar objects, when dusk ends, when dawn starts, moon age, etc.
These functions are helpful for observing stars under the real sky. There are fourteen projection mode in xplns, "Horizontal View Mode", "Equatorial Mode", "Ecliptic Mode", "Galactic Mode", "Planisphere Mode" and "Solar System Mode".
Here are some key features of "Xplns":
· Fourteen projection mode (Horizontal, Equatorial, Planisphere, Solar System, Planisphere mode, etc.).
· Display stars, nebulae, galaxies, planets, sun, moon, comets, minor planets, galilean satellites, etc.
· In addition to standard star catalog (up to magnitude 6.5), SAO star catalog and guide star catalog (GSC) supported.
· Display function of name of the constellations, planets, stars, nebulae, galaxies, etc.
· Magnified figure of planets.
· Grid of equatorial coordinates, ecliptic coordinates, horizontal coordinates, etc.
· Motional display of stars with continuous or real-time drive.
· Display function of Rise, set, meridian time of solar objects, moon age.
· Images of celestial objects.
· Linux 2.4 with libc5(ELF), glibc 2.1, 2.2 or 2.3 on i386
· FreeBSD 4.6.2, 4.7, 4.8 on i386
· XFree86 4.1 or later (256 or more colors)