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DateTime::Astro implements functions used in astronomical calendars: - Solar Longitude - Solar Terms - Lunar Longitude - New Moons ... etc This module is best used in environments where a C compiler and the MPFR arbitrary precision math library is installed. It can fallback to using Math::BigInt, but that would pretty much render it useless because of its speed and loss of accuracy that may creep up while doing Perl to C struct conversions.

The SWISS EPHEMERIS is the high precision ephemeris developed by Astrodienst, largely based upon the DE406 ephemeris from NASA's JPL. Developers can license the Ephemeris library.Ephemeris users find 3200 years of read-made printable files of ephemerides, containing 19'200 print pages in PDF quality. The Swiss Ephemeris is available under a dual licensing model: GPL2 or Swiss Ephemeris Professional License.

py-RO is a collection of utilities including general algorithms, astronomical transformations and Tkinter widgets.

Stellarium is a free open source planetarium for your computer. It shows a realistic sky in 3D, just like what you see with the naked eye, binoculars, or a telescope. It is being used in planetarium projectors. Just set your coordinates and go. This is current stable version based on Qt 5. For the previous, Qt 4 based one, please install `astro/stellarium-qt4' port instead.

Stellarium is a free open source planetarium for your computer. It shows a realistic sky in 3D, just like what you see with the naked eye, binoculars, or a telescope. It is being used in planetarium projectors. Just set your coordinates and go. This is legacy version based on Qt 4. For the latest Qt 5 based one please install `astro/stellarium' port instead.

Set of tools for manipulating and reading geographic data, in particular ESRI shapefiles; C code used from shapelib. It includes binary access to GSHHS shoreline files. The package also provides interface wrappers for exchanging spatial objects with packages such as PBSmapping, spatstat, maps, RArcInfo, Stata tmap, WinBUGS, Mondrian, and others.

Accrete is a physical simulation of solar system planet formation, originally published to Usenet-- probably comp.sources.unix-- in 1991 by Joe Nowakowski. This software is in the public domain. This simulation works by modelling a dust cloud around a Sun-like star, injecting a series of masses which collect dust, and form planets. The simulation then determines what the planetary environments will be like in terms of temperature, atmospheric composition, and other factors. The system description is saved to a file named "New.System".

Astrometry engine aims to create correct, standards-compliant astrometric meta data for every useful astronomical image ever taken, past and future, in any state of archival disarray. The engine will take any image and return the astrometry world coordinate system (WCS) -- i.e., a standards-based description of the (usually nonlinear) transformation between image coordinates and sky coordinates -- with absolutely no "false positives" (but maybe some "no answers"). It will do its best, even when the input image has no -- or totally incorrect -- meta-data.

SETI - Search for Extra-Terrestrial Intelligence -- AstroPulse The project listens for broad-band, short-time pulses that might represent extraterrestial intelligence, or other phenomena such as rapidly rotating pulsars or exploding primordial black holes. The port automatically optimizes for the host CPU using the CPUTYPE variable in /etc/make.conf

SETI - Search for Extra-Terrestrial Intelligence -- Version 7 Use your unused CPU cycles to aid in computations analyzing radio telescope information for possible signs of extra-terrestrial intelligence. The port automatically optimizes for the host CPU using the CPUTYPE variable in /etc/make.conf