Awesome Free Astro Software

(Thanks to Sue Rose of the New York Amateur Astronomers for this list)


3D Solar System
Interactive 3D simulator in which, via a virtual video camera, the planets 
of the solar system and their satellites can be observed, and basic 
scientific data displayed.
http://www.3dsolarsystem.com

3D Space Tour screensavers
Animated 3D screensavers with cosmic scenes. Photo-realistic and 
scientifically correct graphics.
http://www.fpsoftlab.com/products.htm

Aberrator
Image generator that simulates a wide variety of distorsions, such as coma, 
astigmatism, atmospheric turbulence, spherical aberration, etc.
http://aberrator.astronomy.net

Adastra FreeStar
Accessible free planetarium with multiple viewplanes, accurate reports, live 
orbital tracking, and astronomical dictionary.
http://www.5star-shareware.com/Windows/Hobby/Astronomy/adastra.html

Astra Image
Image processing for astronomical images.
http://www.phasespace.com.au

Astro IIDC
Astronomy and Microscopy oriented application developed from the ground up 
to make FireWire camera imaging easier on the Mac.
http://www.outcastsoft.com/ASCASTROIIDC.html

Astro Timer PPC
Pocket PC Software designed for recording the timings of lunar grazings, 
ocultations, transits, meteor showers and any other astronomical observation 
that needs a record of the date and time to the nearest 10th of a second.
http://www.itslifejim.btinternet.co.uk/DawesAstro/software.htm

AstroCalc
Calculates the position of planets and give their appearance.
http://lastrophoto.fr/AstroCalc_en.html

AstroGrav
Allows you to study how astronomical objects move and interact under the 
force of gravity.
http://www.astrograv.co.uk

AstroImageBrowser
Front end to Digitized Sky Survey (DSS) internet repository of astronomical 
images.
http://homepage.mac.com/astrod/software/astroimagebrowser/aib.html

AstroMB
Manage astronomical images and catalogs, allow robotic observations, 
astrometry and photometry.
http://astrosurf.com/astromb

Astrometrica
Software for doing astrometry of asteoroid and comets.
http://www.astrometrica.at

Astronomy Calculator
Provides sunrise, sunset, moonrise, moonset and lunar phase information for 
any location on Earth. Converts the measured values for the stars and 
planets.
http://jumk.de/astronomie/astronomy-calculator.shtml

AstroPlanner
Observation planning and logging with telescope control.
http://www.ilangainc.com/astroplanner

AstroSnap
Astronomical imaging programs especially designed for webcams.
http://www.astrosnap.com

AstroStack
A program with a flexible and professional format for combining astronomical 
images and extrcting them from video.
http://www.astrostack.com

ATC Advancede Telescope Control
Telescope control and automated supernovae search.
http://www.omegalab-atc.com

AVIS FITS Viewer
FITS Image Viewers and Format Converters. The software packages display or 
manipulate the relatively simple class of FITS data files that containing 
2-dimensional images, often of celestial objects in the night sky.
http://fits.gsfc.nasa.gov/fits_viewer.html

Binary Stars
Free astronomical software for Macintosh computers, complete with manuals, 
teaching binary star concepts, for classroom or personal use.
http://www.uark.edu/misc/clacy/BinaryStars

Blink Comparator
Program to visualise a series of images in succession. Useful for detecting 
changes, such as movement, between one image and the next, such as that 
expected for comets and asteroids.
http://rbytes.net/software/blink-comparator-review

C2A
A basic but effective planetarium that allows remote telescope control and 
the locating of both solar system and deep sky objects. Compatible with the 
principal stellar catalogues (UCAC2, UCAC3, USNO etc). Allows the overlay of 
your own images or those downloaded from the PSS.
http://astrosurf.com/c2a/english/index.htm

CADET
Image processing program specific to astronomical images that supports FITS, 
Bitmap and JPEG formats.
http://www.terra.es/personal2/oscarcj/introeng.htm

Cartes du ciel
Free sky atlas for windows that provides access to catalogs and photographs 
(Sky charts in english).
http://www.stargazing.net/astropc/index.html

Celestia
A scientifically accurate 3D space simulation (uses OpenGL), contains 3D 
positions of everything from stars to asteroids and artifical satellites 
(also a large amount of expansion addons are available).
http://www.shatters.net/celestia

Charon
Minor planet astrometry software.
http://www.projectpluto.com/charon.htm

CNebulaX
Deep sky astronomy software for star charts with 25 million stars and 1.25 
million deep sky objects.
http://www.uv.es/jrtorres/CNebulaX.htm

CyberSky
Colorful, easy-to-use planetarium program.
http://www.cybersky.com

Deep Sky Database
Online resource for building customized observing lists.
http://www.virtualcolony.com/sac

Deep Sky Stacker
Freeware for astrophotographers that simplifies all the steps of combining 
images taken with CCD or DSLR cameras by automatically combining light, 
dark, bias and flat frames. Images can be saved in a variety of formats for 
subsequent editing, including fits. Available in several languages.
http://deepskystacker.free.fr/english/index.html

Delphinus
Freeware designed to control Canon DSLR Cameras by Serial Port (RS-232).
http://www.softsea.com/review/Delphinus.html

Desktop Lunar Calendar
Simple, fun and easy to use calendar. It is accurate anywhere in the world.
http://www.moonphasesoftware.com/moon_calendar

Digital Universe
Atlas for 3D visualisation of Galactic and extragalactic objects.
http://www.haydenplanetarium.org/universe

Distant Suns
Planetarium program that allows you to input the orbital parameters of any 
object.
http://www.distantsuns.com/downloads.html

Dome View
Complete program for the observation of lunar domes.
http://luna.uai.it/luna.htm

DS9
Professional level, stand alone application for the visualisation of fits 
format files. Supports binary tables, multiple frame buffers, colour maps, 
masaicing, blinking and much more.
http://hea-www.harvard.edu:80/saord/ds9

DSLR shutter
Utility to control the "B" shutter setting of digital SLR cameras. Exposure 
time, number of images and delay between one image and the next can all be 
set. Available for Windows and Mac.
http://www.stark-labs.com/DSLR_Shutter.html

EasySky
Star charting (planetarium software), 3D solar system, and animations.
http://www.easysky.de/eng

Eclipse
Freeware to calculate all the lunar and solar eclipses visible from a given 
location.
http://www.eclipse.org

Eclipsing Binary Simulator
Visualise the orbit and synthetic light curve of binary star systems.
http://cosmion.net/software/ebs

EfeCalc
Calculates the position, rise times, and set times of the Sun, Moon, 
Planets, Stars; Solar and Lunar Eclipses (with maps generation).
http://www.mat.uc.pt/~efemast/netscape/efecalc/index.html

Encyclopedia Galactica
Planetarium software, explore the moon features, 3D solar system.
http://www.eureka.ya.com/javastro

EquinoX
13 different filters for organizing deep sky objects and many controls to 
adjust the sky display, can run your astro-imaging webcam, has SBIG camera 
support, and will control your telescope with voice commands.
http://www.microprojects.ca

Find Orb
Determines the orbital parameters of solar system bodies, such as asteroids, 
comets or satellites, from astrometric observations. 
http://www.projectpluto.com/find_orb.htm

Fireball
Program to calculate the atmospheric trajectory and orbit of meteoroids.
http://www.fis.unipr.it/~albino/ITASN/documenti/fireball.html

Fv
Graphical tool for viewing and editing fits files. Easy to use and very 
light in terms of disk space.
http://heasarc.gsfc.nasa.gov/ftools/fv

Gravitation3D
Uses OpenGL to simulate star fields, planet trails, sun lighting, gravity 
wells, and much more
http://www.gravitation3d.com

Gravity 3D
Simulates the gravitational interaction between galaxies in collision.
http://www.mars3d.com/PWGravity3D.htm

Gravity Simulator
Celestial mechanics simulator that uses numerical integration to create 
dynamical models of celestial bodies.
http://www.orbitsimulator.com/gravity/articles/what.html

Guide
Complete Star Charting software.
http://www.projectpluto.com

Guide Dog
Stand alone software for autoguiding with a webcam. Controls various mounts 
via the ASCOM platform. Works with Windows XP and earlier.
http://www.barkosoftware.com/GuideDog

Hallo Northern Sky
Planetarium complete with SAO, PPM and Tycho-2 catalogues. Supports the 
import of external catalogues and can control ASCOM compatible telescope 
mounts.
http://www.hnsky.org/software.htm

Helio
Suite of three programs for calculating the geometrical and physical 
parameters of sunspots.
http://www.petermeadows.com/html/software.html

HomePlanet
Astronomy, space, and satellite tracking package.
http://www.fourmilab.ch/homeplanet/homeplanet.html

INFO-MAC Science and Math
MoonClock, Moon Tool, NightSky, Planet, StarAtlas, MacAstro, MAIA, etc.
http://www.info-mac.org/viewforum.php?f=94

IRAF
Professional data analysis software.
http://iraf.noao.edu

IRIS
Complete program for the reduction and analysis of astronomical images.
http://www.astrosurf.com/buil/us/iris/iris.htm

JupSat
Calculates and displays the positions of Jupiter's four main (Galilean) 
moons.
http://indigo.ie/~gnugent/JupSat95

JupView PPC
The positions of Jupiter's satellites, Great Red Spot and a map of Jupiter's 
features.
http://www.itslifejim.btinternet.co.uk/DawesAstro/software.htm

K3CCDTools
Includes video-capturing, autoguiding, frame aligning and stacking and 
simple post-processing.
http://www.pk3.org/Astro

L.O.W. Lunar Occultation Workbench
Computes predictions of occultations by the Moon of the planets and stars.
http://low4.doa-site.nl

LunarPhase
Graphically displays the current phase of the moon and much more.
http://www.nightskyobserver.com/LunarPhase/index.htm

Mars MOLA Viewer
View the actual terrain of Mars, at any point on the surface, as a 
fly-through real-time 3D rendering.
http://cgibin.starpower.net/mmacdonald31/demo3d/mars/index.html

Maxclock 3.1
High-precision clock, displays sidereal and solar times, equation of time, 
Julian dates, Delta-T, aequatorial and ecliptic coordinates of sun and moon.
http://www.umark.de/maxclock/maxclock_main_e.html

Meteor Observation Log
Log is designed around a 3 hour observation session with the capablity to 
record up to 20 meteors an hour.
http://kf4yre.tripod.com/databases.html

MicroObservatory
An astronomical image processing program that works with FITS and GIF files.
http://mo-www.harvard.edu/MicroObservatoryImage

Minor Planet Observer
MPO Connection and Canopus.
http://www.minorplanetobserver.com

MODAS
Modern Optical Design and Analysis Software.
http://www.myoptics.at/modas

MoonDock
Shows moon phase on desktop plus other info.
http://www.macupdate.com/app/mac/6238/moondock-x

Moovastar
Proper motion simulation, simulates star positions in the future and past.
http://www.xs4all.nl/~sahjps/astro.html

MPL3D Solar System
Explore the solar sytem and thousands of real extrasolar objects in a 3D 
interactive simulation of the close universe.
http://www.mpl3d.com/solar.htm

NASA World Wind
Freeware by NASA to monitor earthquakes, floods, seaquakes and other natural 
events all over the world.
http://worldwind.arc.nasa.gov/java

Night & Day
Calculates Sunrise and set times for any location on Earth.
http://www.marcomenichelli.it/programma_ND.asp

NightCal
Produces a single A4 sheet monthly calendar telling the user when it gets 
dark, when the Moon rises and sets and what the Moon should look like when 
it does make an appearance.
http://www.nightcal.co.uk

Open Universe
Real time 3D simulator of the solar system.
http://www.openuniverse.org/index.php?pag=seccion&seccion=6

OpTiX
Comprehensive optical design software
http://www.optenso.de/index.html

Orbit Explorer
Physics educational software for high school and college students and 
teachers.
http://www.ottisoft.com/orbit_x.htm

Orbiter
Flight simulator that takes the user beyond the terrestrial atmosphere.
http://orbit.medphys.ucl.ac.uk

OrbiterViewer
OrbitViewer is an interactive applet that displays the orbit of small bodies 
(comets or asteroids) in the solar system in 3D.
http://www.astroarts.co.jp/products/orbitviewer/index.html

Orbitron
Satellite tracking software for visual observers and radio amateurs.
http://www.stoff.pl

Peranso
Period analysis software for variable stars.
http://www.peranso.com

Perseus
A vector engine-based planetarium, with USNO2 support, real images 'melt' 
into the background, 3D graphics for solar system bodies.
http://www.perseus.it/it

PHD guiding
Freeware autoguiding software. Carries out automatic axis calibrationonce 
the guide star is selected. Available for Windows and Mac.
http://www.stark-labs.com/phdguiding.html

PIXY system 2
Automated astronomical image examination system.
http://www.aerith.net/misao/pixy/index.html

PP3
Free tool for drawing celestial chars in resolution-independent format 
(PDF).
http://pp3.sourceforge.net

PixInsight
A modular, open-architecture, portable image processing platform available 
on Linux/UNIX and MS Windows.
http://pixinsight.com

Planetarium
Displays star charts and other astronomical data on Palmtops.
http://www.aho.ch/pilotplanets

Planetary, Lunar, and Stellar Visibility
Program that generates a 3-colour diagram showing when a planet, star or the 
Moon are visible from a given point on the Earth.
http://www.softpedia.com/get/Others/Home-Education/Planet-s-Visibility.shtml

Pocket Stars PDA
A star chart, ephemeris, and Celestial Navigation calculator for the Pocket 
PC.
http://www.nomadelectronics.com

Registax
Excellent application for registering, summing and reducing images of the 
Sun, Moon and planets.
http://www.astronomie.be/registax

RSI New Moon
Easy-to-use educational software for middle school through college. 3D views 
of the Moon's phases, the Solar System, and more.
http://www.riversci.com/newmoon.shtml

RTGUI: Windows Real-Time Interactive Astronomy Software
Controls most 'goto' telescopes, rapidly locate planets, deep-sky objects, 
and bright stars from catalogs.
http://www.debunker.com/astro/rtguipage.html

Satellite Tracking Software
Real Time Tracking of an Unlimited Number of Satellites, for many types of 
telescopes including the full line of Celestron, Meade, Astro-Physics, etc.
http://www.nlsa.com

Scope Calculator
Calculates and compares the magnification, field of view, and exit pupil of 
up to 7 eyepieces when used with a specific telescope.
http://homepage.mac.com/nmonks/index.html

Sideralis
Little application for mobile phones showing sky maps. Works on almost all 
new generation mobile phones except "blackberry".
http://sideralis.free.fr

SimSolar
Solar System Simulator with Moon Phase display & Galilean Moons of Jupiter 
Simulator.
http://www.pwr-tools.com/simsolar

Sky Atlas
A program for anyone that wants to know how to identify constellations and 
other space objects: stars, galaxies, nebulas, planets.
http://www.skyatlas.eu

Sky Charts
Program that produces personalised star charts. The database contains 16 
star catalogues and asteroids, comets and planets can also be inserted.
http://www.ap-i.net/skychart/start

SkyMap
Planetarium software with telescope control features.
http://www.skymap.com

SkyORB VR
A real time visual space simulation with ephemeris
http://www.realtech-vr.com/skyorb

StarCalc
Professional astronomy planetarium & star mapping program for Windows 
9x/ME/NT/2000/XP with plugin support.
http://homes.relex.ru/~zalex

StarChartGL
OpenGL star chart with photo-realistic views of 110,000 stars, 110 messiers 
and all the planets.
http://www.starchartgl.cjb.net

StarStrider
A software planetarium, a virtual space-ship, an three dimensional star 
chart, and more.
http://www.starstrider.com

StellaNavigator
Astronomy Simulation Software.
http://www.astroarts.co.jp/products/software.shtml

Stellarium
Complete planetarium for realistic 3D visualisation of the celestial sphere 
as it would appear to the naked eye, through binoculars or a telescope.
http://www.stellarium.org

Stig's Sky Calendar
Program that generates ephemerides in graphical form, implemented in a 
simple planetarium.
http://www.skycalendar.com/download

Sun and Moon Almanac
Graphical Sun and Moon Almanac.
http://www.almanac.com/moon

SUNDI
Designed to allow you to quickly and easy design and plan the most popular 
sundials.
http://www.softpedia.com/get/Science-CAD/Sundi.shtml

Swiss Ephemeris Info
High precision ephemeris.
http://www.astro.com/swisseph

TachyonNET for PocketPC
A complete astronomical package for serious amateurs. It includes Meade 
Telescope Control.
http://tachyonweb.net

Terra et Caelum
Visualiser for terrestrial and celestial physical phenomena such as 
earthquakes, terrestrial rotation, the Doppler effect, expansion of the 
Universe, precession, nutation, lunar motion, cyclones etc. etc.
http://web.tiscali.it/geoanim

The Nine Planets
A collection of information, images, scientific and historical notes on the 
planets of the solar system.
http:/www.astrofilitrentini.it/tnp/

TPoint
Telescope pointing analysis software.
http://www.tpsoft.demon.co.uk

Tria Image Processing
The Tria program enables fast and effective deconvolution and blind 
deconvolution, image math, and image registration. Version 2.0 provides 
faster processing, improved display, and unique image analysis tools.
http://quarktet.com/Tria.html

TUMOL
Database che contiene un rilevante numero di informazioni su tutti gli 
oggetti di Messier. Ottimo supporto per coloro che desiderano trovare nel 
cielo gli oggetti del celebre catalogo.
http://www.davidpaulgreen.com/tumol.html

Uniview
Uniview is a realtime 3D computer graphics platform for astronomy- and 
Earth-based sciences, used by leading planetariums like Hayden (New York) 
and Gates (Denver).
http://www.scalingtheuniverse.com

VirGO
Plug-in per Stellarium (in realtà dal link si scarica tutto il software, 
compreso Stellarium stesso) che permette di navigare i dati dell'archivio 
ESO (spettri e immagini).
http://archive.eso.org/cms/tools-documentation/visual-archive-browser

Virtual Moon Atlas
Excellent program for the exploration and study of the lunar surface.
http://www.ap-i.net/avl/en/download

VITO AstroNavigator
GPS application that displays sky map above you accordingly to your current 
position, time and direction of movement.
http://www.vitotechnology.com/astronavigator.html

VRMars-Spirit - The Red Planet Mars 3D
Virtual Reality Astronomy Software presenting the Mars Exploration Rover 
Spirit Mission, powered by the VRPresents technology. It gives the feel of 
being on the surface of Mars.
http://www.vrmars.com/VRMars-Spirit-The-Red-Planet-Mars-3D.htm

VSPEC
Program for the reduction of digital astronomical images.
http://astrosurf.com/vdesnoux

Where is M13?
Program to locate deep space objects with respect to our galaxy. Provides a 
lot of information for the objects in its database.
http://www.thinkastronomy.com/M13/common/download.html

Winjupos
Freeware for the reduction of images of the Sun, Moon and planets. Very rich 
in mathematical functions, including the possibility of producing real 
surface maps on which calculations can be performed.
http://www.grischa-hahn.homepage.t-online.de/astro/winjupos/index.htm
Winstars
Planetarium, showing you the appearance of the sky, as seen from anywhere on 
Earth, for any date.
http://www.winstars.net/english/index.html

Xephem
Star-charting, sky-simulating, ephemeris-generating software
http://www.clearskyinstitute.com/xephem

YoMama
Yale Observatory iMAge Manipulation Application
http://www.physics.drexel.edu/~goldberg

Zubot Suite
This is a group of programs which allow you to align, rotate, stack, and 
enhance astronomy pictures.
http://www3.telus.net/public/blzubot/Programs.htm

Other useful links on Dan Bruton's software webpage.
Please contact us to point out bad links and/or new freeware to add to this 
list.