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Interactive Web Resources
Earth and Moon ViewerInteractive server which lets you view the Earth and Moon, as illuminated by the Sun at the time of your request, from a variety of viewpoints.
Orbits in Strongly Curved SpacetimeAn interactive Java applet which illustrates how orbits around compact objects such as neutron stars and black holes depart drastically from Kepler's laws, and explains why. Source code for the applet is available.
Solar System LiveSolar System Live, an interactive Orrery for the Web, lets you view the solar system in a variety of ways for any date between 4713 B.C. and A.D. 8000. An ephemeris can be displayed for any location on Earth and, given orbital elements in the form published in the IAU Circulars, the orbit and position of asteroids and comets can be plotted.
TerranovaAs life inexorably expands from the home planet throughout the galaxy and beyond, there will come a time when our descendents render a new planet habitable every day. Terra-nova invites you to visit the terra-formed planet of the day. New: 2006 update provides larger JPEG images with improved planet image quality and more realistic star fields including star clusters.
Your SkyYour sky makes custom maps of the sky for any location on Earth and any date from 4713 B.C. into the distant future. Maps can include stars as faint as magnitude 6.5, constellation names, outlines, and boundaries, the Moon and planets, deep sky objects from a database of more than 500, and a comet or asteroid whose position is calculated from its orbital elements. A variety of display options allow customizing the map for its intended use.
Free Software STELLARIUM PLANETARIUM SOFTWARE 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. SOME ASTRONOMICAL OBJECT CATALOGS Not software. LUNAR OCCULTATION WORKBENCH This program computes occultations by the moon of eight planets and 54 thousand stars. See homepage for more info. (14MB) MERIDIAN Calculates many planetary events. Position of planet satellites and phases of planets. Rise and set times and much more. (724KB) AVIS Avis is a FITS viewer. FITS files are used in scientific applications like astronomy and medical imaging. (830KB) ANALEMMA Displays a full year of solar visibility. Includes sunrise/sunset, equinoxes/solstices and dates of earliest/latest sunrises/sunsets. IRIS Iris offers numerous and powerful functions of image processing in the field of the digital astronomical images. It is particularly optimized to exploit the images that come from CCD or DSLR cameras. Iris can load and save images in the formats FITS, PIC (proprietary format), raw or BMP. (2.5MB) PLANET VISIBILITY This program presents a simple 3-color graph that tells, when a planet (or moon, sun) is visible from your location. (10MB) PLANETARY APPRENTICE Planetary Apprentice is a reference tool that displays several properties for a selected planet. There are 18 properties divided into four categories - orbital, physical, axial, and atmospheric. The Apprentice shows all 18 properties for your selected planet in one scrollable window. (4.0MB) TUMOL The Ultimate Messier Object Log (TUMOL) is a database that contains relevant information for all 110 Messier objects. It contains various layouts to assist amateur astronomers in documenting their search for deep sky objects. (3.1MB) THE SIMPLE OBSERVING LOG The Simple Observing Log (TSOL) is intended as a place where you can keep track of all your star-gazing information. After recording your observations, you can view and print your observing records sorted by date or by object. There's space where you can sketch your observations on the page, or place scans of your sketches after you're done. An "astrophoto" section for each observation lets astrophotographers keep track of their exposures as well. When you want to use TSOL in the field, simply choose "Nightvision Mode" to switch to a vision-saving red display. (2.2MB) HELIO Calculates the latitude/longitude and area of sunspots. The only inputs are the data/time, the sunspot x and y coordinates and sunspot size. (846KB) CELESTIA Celestia is a real-time visual simulation of space. Choose a point within the Local Group of galaxies and Celestia will show you an approximation of how it would appear to your eyes were you actually there. Celestia is unique in its ability to allow you to navigate at an immense range of scales. Orbit a couple kilometers above the surface of a tiny, irregular asteroid, then head off toward Jupiter, watching it grow from a bright point of light into a looming sphere filling your field of vision. Leave our solar system entirely and observe the sun as it fades from a brilliant disk to a bright star, disappearing almost entirely as you head off toward the Upsilon Andromeda system to orbit around its innermost giant planet. (11MB) ASTROSTACK AstroStack has some essential tools in order to load and combine a set of pictures (from an AVI video or a sequence of bitmaps) and make it into a detailed and noise free image. Take advantage of the short shutter speeds (1/25 or 1/30 of a second) of video and combine as many images as you can. (724KB) GRAPHDARK GraphDark allows you to work out when an astronomical object will be visible from your location and when moonlight, twilight or low haze will affect its visibility. An additional option displays the moon's phases as a lunar calendar. (2.5MB) OPEN UNIVERSE Realtime Solar System Simulator, simulates the major planets and moons in 3D on your computer. (4.5MB) ORBITER Orbiter is a realistic space simulation using proper physics for the modelling of planetary motion, gravitational fields, free space and atmospheric flight etc. (19MB) MARS PREVIEWER II Displays the central meridian and angular size of the red planet for any date and time. (3.1MB) EFEBIN Calculates, in binary stars, the relative position of one of the stars regarding the other one, for one or more dates, and shows a graph with the location of those stars; also it draws the apparent relative orbits. DOS program. (183KB) VIRTUAL MOON ATLAS This software, realized by Patrick Chevalley and Christian Legrand can visualize the Moon aspect for every date and hour. It permits also to study lunar formations with unique databse and pictures library compiled by Christian Legrand. It's conceived to be easily usable "in the field" according to an observing session needs, but also to study "at home" the Moon and its relief. Smaller downloads are available at the home page. (362MB) SOLAR ECLIPSE VIEWER Solar Eclipse Viewer is a 32-bit astronomical program for Windows to search for solar eclipses and display global circumstances (eclipse map). (974KB) ASTROBYTE LOGGING SYSTEM An easy to use database to keep all your astronomical observations together in one package. It contains over 10,000 of the best pre-selected objects along with a form to enter new selections. It keeps track of objects, which you have observed, along with objects that you still need to observe to fill a catalog. (20MB) MOONLOC MoonLoc shows the location of the sun and moon in the sky for any date/time. Sun rise/set moon rise/set is found instantly. Shown: Right Ascension, Declination, Altitude, Azimuth, Angle between sun and moon (which is also the moon's phase). Just a very basic program. (122KB) ADC Shows you current universal time, Julian date, GST and local sidereal time. (2.9MB) MOONPHASE Moonphase - displays the current moon phase of selected day. (1.5MB) GRANDTOUR Flexible wireframe simulator for the Voyager and Giotto space missions, with animation capability. Developed at JPL for science/navigation, and filmed by the BBC/NOVA. This is a DOS program. (334KB) K3CCD TOOLS Basic image processing or stacking program for use with CCDs, digital cameras or webcams. Free for personal use only. (2MB) ALTAIR Altair calculates Local Sidereal Time, Julian Date, Universal Time, RA/DEC to Alt/Az and Alt/Az to RA/DEC. (4.2MB) TCOL The Caldwell Observing Log (TCOL) is very similar to The Ultimate Messier Object Log, except it describes the 109 objects described by Sir Patrick Caldwell Moore in his Caldwell Catalog. (3.1MB) VARIABLE STARS OBSERVER This free program help you to plan and log variable stars observations. This is not a data analysis software. (554KB) EFECALC Calculates astronomical phenomena. Besides positions (Sun, Moon, Planets and Stars) this program gives results for: Solar and Lunar Eclipses (with maps), Phases of the Moon, Calendar Dates (Easter, Chinese Calendar,...). (2.8MB) ASTROFLY Its main purpose is to present the three-dimensional models of our neighborhood in our own Milky Way Galaxy on a personal computer. The 3D models are based on the remarkable Hipparcos and Tycho Catalogues. (20MB) DARKADAPTED DarkAdapted is a gamma control application program. It modifies your screen gamma settings so that you may, for example, preserve your dark adaptation while using your computer. Can turn it night vision red. (4.5MB) RESOLUTION Calculates the focal plane image diameter of an object given its angular size in arcseconds and the focal length of the telescope. Resolution can also calculate either arcseconds, distance or separation given two out of three parameters. (37KB) MAXCLOCK MAXCLOCK is a high-precision digital astronomical clock. It displays the following data on your computer screen: Civil date & time, day number in the year; Julian date and modified Julian date both in terms of ephemeris time ET (TT) and universal time UT1; Delta-T, the difference between ET and UT1; Mean solar time, apparent solar time, equation of time; Mean sidereal time, apparent sidereal time, equation of equinoxes; Geocentric ecliptical and equatorial coordinates of sun and moon; Constellation and zodiac sign for the sun; Constellation, zodiac sign, phase, appearance, and illuminated fraction of the moon; Elongation between sun and moon; Earth distance to sun and moon. This is a DOS program. (200KB) SUNCYCLE Suncycle is a calendar showing the sunrise and sunset time for a latitude/longitude and timezone. You can also create a suncycle graph. (1.1MB) GRAVITY SIMULATOR Gravity Simulator provides amateur astronomers with a powerful numerical integration tool. By performing n-body simulations, you can study the orbits of planets, moons, asteroids, or any object in the universe. You can recreate simulations performed by professional astronomers, or experiment with simulations of your own creation. (2.1MB) NIGHTCAL Basic observation session planning. It is designed to produce a 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. It also provides data on the elongation of the inferior planets. (1.5MB) MOON PHASE CALCULATOR Moon Phase Calculator allows you to calculate the phase of the Moon for any time in the past or future and to search for the next or previous full moon, new moon or first or last quarter. (189KB) THE PLANETS Predicts and animates transits, shadow transits, eclipses, and occultations of Jupiter's four bright moons. Great red spot too. Also shows the position of Saturn's moons. (96KB) JUPITER Jupiter 2.0 is a software for the calculation of Jupiter's satellites ephemeris, with a graphical view of the jovian system. (1.5MB) DEEPSKYSTACKER DeepSkyStacker is for astrophotographers that simplifies all the pre-processing steps of deep sky pictures. Registering. Stacking. Simple post-stacking processes to quickly view the final result. Saving the resulting picture to a TIFF file (16 or 32 bit). (6.3MB) PP3 PP3 creates celestial charts. It generates resolution independent maps of very high graphical quality. They can be used for example as illustrations in books or on web pages. You may use own databases or free ones from the Internet. (1.7MB) REGISTAX Used to stack images in astrophotography. (964KB) MOONPHASE Displays the current moon phase of current day as an icon in the Activity field. You can change time zone, latitude and longitude (you can also click on the map!) to get a more accurate moon rise and set times and also the sun rise and sun set. There's also a southern hemisphere version. (1.3MB) WINJUPOS Database for object positions on planets, moons and sun. (2.9MB) please report any broken or dead links to support
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Since April 24th, 2008 Last Updated 08/24/2008
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