The images are available in jpeg and tiff formats in optimal resolution.

Correct credits are available under "More info"(needs access to WWW).

The Hubble Space Telescope project is an international cooperation between ESA and NASA

Credit: Hubble European Space Agency Information Centre: Lars Lindberg Christensen & Martin Kornmesser."

Other features included are: an editable observing list; a Moon explorer tool which describes craters and points their location on a picture; a solar system orrey; a Moon phase and position table calculator for a chosen range of time; and a Jovian system simulator.

You know you can buy a planisphere at most bookstores, but if you want a planisphere for another latitude, it can be problem. This program solves this. You can set latitude in a wide range (25-80° North or South) and display appropriate sky area on monitor, but, of course, also print it out. If, for instance, you are from north or central Europe and plan to spend holidays in southern Europe, with a planisphere you can recognize constelations, which aren't available at your higher latitude. If you have appropriate tools (like Adobe Illustrator), you can easy edit PDF output too.

Planispheres are a must for people starting to familiarize with the night sky as well.

Although the program is freeware, if you like it, you can support its next development by sending some money via MoneyBookers (check the homepage for the details). Please give this idea some serious consideration!

This is the Windows version; Linux, MacOSX and sourceTarball also available for download.

Check the homepage to read the credits.

The viewers themselves are rather small in size (around 300 Kb) but you will need to separatly get the data sets from NASA/GSFC.

Standard program options include: Auto Despeckle - fill random missing pixels and correct bad pixels (salt and pepper effect); Auto Reconstruction - fill systematic missing pixels (max. 75% missing pixels) ; Auto Contrast Stretch; Auto Flip Vertically; Auto Invert Display; Auto Sharpen; Auto Minimize ( 50% original image); Auto Scan - scan pause options (2,3,4,5 seconds)

Buttons: Next and Previous image buttons; Scan Forward button; Scan Backword button; Scan Stop button; Restore Original Image button; Despeckle on/off button; Reconstruction on/off button; Contrast Stretch on/off button; Flip Vertically on/off button; Sharpen on/off button; Invert Display on/off button; Minimize on/off button; Brightness up/down buttons; Contrast up/down buttons; Brightness gradient reduction buttons; Info Image button.

Features include:

Also provided are large graphics with the phases of the Moon and Mars and the current sunlit side of the Earth.

In order to calculate atmospheric trajectory and orbit of meteoroids, Fireball needs:

1- Data and hour (Universal Time) of the observed fireball
2- Geographical location of two observer that observed the same fireball
3- Equatorial coordinates of two trajectory points from observer number 1
4- Equatorial coordinates of two trajectory points (not the same of observer 1) from observer number 2
5- Duration of the fireball from the two observers

Press the button <Trajectory> to calculate atmospheric trajectory. The file "Trajectory.txt", with all the data, will be written in the Fireball folder. The most important data are written also at the bottom of the window dialog.

Check the resulting mean velocity value. If you want an orbit for this velocity value press the button <Orbit> otherwise put a new value and press. The file "Orbit.txt" with all the data will be written in the Fireball folder.

Correction applied to atmospheric velocity to obtain eliocentric value:
- Earth's rotation
- Diurnal aberration
- Terrestrial gravitation
- Earth's orbital motion