Version 1.8.2 - 10th May 2010
Greatly improved the way that orbits are calculated.Improved the handling of units by allowing the easy definition and use of a default selection of units.
Made several improvements and corrections to the sample simulations.
Corrected a fault that caused version 1.8.1 to crash when opening a simulation with a table that was last modified with version 1.6.3 or earlier.
Corrected a fault that caused an undo of an evolver settings edit made during evolution to sometimes not work.
Corrected a fault that caused double-clicking on a Mac data file to result in the startup preference activating as well as the file opening.
Various minor bug fixes and improvements.
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Version 1.8.1 - 17th December 2009
Speeded up the display of table windows and view windows.Ensured that a tool palette always remains on screen when its owning window is moved, resized, or maximized.
Added recent discoveries to the Solar System sample simulations and changed their start date to 01/01/2010.
Corrected a fault that caused the Edit Object... button of an object window to fail to respond to the Carriage Return or Enter keys.
Corrected a fault that caused the width of a table column to revert to its default after being hidden, saved, re-opened, and re-shown.
Corrected a fault that caused the positions of objects on view windows to be slightly out of step with their orbits.
Improved the appearance of transiting reflective bodies on view windows.
Various minor bug fixes and improvements.
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Version 1.8 - 21st October 2009
Added several new commands for manipulating model windows.Made several improvements to the handling of date and time units.
Made several improvements to tool bars and added new tool palettes.
Added new preference settings allowing you to specify the positions of tool bars and status bars.
Significantly reduced the size of the Windows download.
Improved the terminology used for the different types of windows.
Added several different custom cursors that make navigation less error prone.
Speeded up the graphics display in most cases.
Various minor bug fixes and improvements.
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Version 1.7.2 - 12th June 2009
Added a facility to save and restore family patterns in the Edit / New Family... command.Added the Comet Gehrels 3 and Disaster! sample simulations.
Corrected a fault that caused a very slow response to an attempt to select a large number of objects.
The keyboard shortcut for the Evolve / Run Backward command now works correctly.
Expanding and collapsing a tree node can now only be done by using its handle, and not by double-clicking on it.
Corrected a fault that caused the preference for opening the root node of trees to be ignored in some cases.
Various minor bug fixes and improvements.
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Version 1.7.1 - 8th May 2009
Added the speed of an object to its label when it is selected on a model window.Added the speed and magnitude of an object to its information popup.
Corrected a fault that could cause AstroGrav to not run at all on a small proportion of Windows PCs.
Added a preview panel to the color chooser.
Corrected a fault that could cause unwanted gaps to appear in some lines on model windows.
Various minor bug fixes and improvements.
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Version 1.7 - 3rd February 2009
Added facilities for selecting multiple objects, together with several new and enhanced commands that operate on multiple objects.Added three new commands that can be used to cut, copy, and paste groups of objects.
Improved the commands for deleting and merging objects so that they operate on multiple selections.
Simplified the addition of new objects by splitting the Edit / Add Object... command into two separate commands.
Added a new Type field to the physical elements of objects, which may be set to Star, Planet, Moon, Asteroid, Comet, Spacecraft, or Projectile.
Various minor bug fixes and improvements.
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Version 1.6.3 - 4th November 2008
Improved the Edit / Find... command.Added the View / Show / Data command to allow the data in the corners of model windows to be shown or hidden as desired.
Corrected a fault that could cause valid .ast files to be rejected as invalid.
Added recent discoveries and changes to the Solar System sample simulations and changed their start date to 01/01/2009.
Corrected a fault that could cause the status bar to fail to update correctly.
Slightly speeded up simulation evolution.
Various minor bug fixes and improvements.
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Version 1.6.2 - 5th September 2008
Improved the way that evolution is indicated on the status line.Corrected a fault that occasionally caused part of an orbit to be drawn as a straight line instead of as a curve.
Corrected a fault that caused the magnitudes of objects to be displayed incorrectly.
Significantly speeded up the drawing of model windows.
Corrected a bug that sometimes caused a non-luminous object (such as a planet) to be invisible when in transit against a luminous object (such as the Sun).
Various minor bug fixes and improvements.
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Version 1.6.1 - 14th April 2008
Improved the Edit / Add Family... command to make experimenting with new families much easier.Corrected a bug that could cause object collisions to sometimes not work correctly.
Improved number displays, so that numbers such as 1.2 no longer display as (for example) 1.199999999999998.
Corrected a bug that caused the horizontal scroll bar to never appear on new tables, regardless of the preference setting.
Corrected a bug that caused the Peri Arg column of exported data to just be a duplicate the Mean Anom column.
Various minor bug fixes and improvements.
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Version 1.6 - 14th January 2008
Added four new keyboard commands for adjusting the magnification in full screen mode.Added four new keyboard commands for adjusting the brightness in full screen mode.
Added five new keyboard commands for controlling simulation evolution in full screen mode.
Added an installer and uninstaller for Windows.
Improved the Edit / Find... command.
Added the Help / Enter License... command to allow easier license entry.
Various minor bug fixes and improvements.
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Version 1.5 - 3rd December 2007
Added an animated and interactive full screen mode.Added recently discovered objects to the Solar System sample simulations and changed their start date to 01/01/2008.
Speeded up simulation evolution, tree display, and phase drawing.
Various minor bug fixes and improvements.
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Version 1.4.3 - 3rd September 2007
Repositioned the windows of sample simulations to make much better use of larger monitor resolutions.Corrected a bug on Windows that caused the Help / Model Navigation command to only work once.
Corrected a bug that caused the wrong time unit to be used in some situations.
Slightly speeded up simulation evolution.
Julian dates are now displayed without exponents - eg, 2454101.5 instead of 2.4541015e6.
Corrected a bug that could cause some table column headers to appear blank after the columns have been re-ordered.
Various minor bug fixes and improvements.
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Version 1.4.2 - 26th July 2007
Greatly reduced the flickering of faint objects on model windows, and speeded up the graphics drawing.Added the facility to use Julian dates in Solar System simulations.
Corrected a bug causing duplicate options in the Quick Setup feature of the Edit / Add Family... command.
Corrected several bugs with the Undo and Redo commands of text components.
Various minor bug fixes and improvements.
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Version 1.4.1 - 3rd April 2007
Speeded up the graphics drawing on model windows.Added the STEREO spacecraft sample simulation.
Corrected colors of major Solar System objects in the sample simulations.
Model window duplication when a simulation is evolving now works correctly.
Various minor bug fixes and improvements.
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Version 1.4 - 27th February 2007
Added Dutch, French, German, Italian, Portuguese, and Spanish localizations.On Windows, greatly improved the performance and UI responsiveness.
Corrected a fault that could cause model navigation commands to function incorrectly during evolution.
File dialogs now keep track of the last used folder.
On Mac OS X, speeded up table displays.
Various minor bug fixes and improvements.
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Version 1.3.6 - 10th January 2007
Added Comet McNaught (C/2006 P1) to the Solar System and Planets, Comets sample simulations.Added the New Horizons sample simulation.
Made the fields on detail windows copyable.
On Mac OS X, made the fields on detail windows much easier to read.
Added a menu item for displaying the Model Navigation Guide to the main popup menus.
Various minor bug fixes and improvements.
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Version 1.3.5 - 5th December 2006
Added recently discovered objects to the Solar System sample simulations and changed their start date to 01/01/2007.On Mac OS X, corrected a bug which caused the brushed metal look and feel to not work on some computers.
Improved many of the tool tips and messages.
Various minor bug fixes and improvements.
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Version 1.3.4 - 18th September 2006
Significantly speeded up simulation evolution.Improved the model window graphics by removing the 'edges' that could sometimes be seen on object auras.
Various minor bug fixes and improvements.
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Version 1.3.3 - 4th August 2006
Corrected a bug which could occasionally make a simulation unusable after a collision.Speeded up simulation evolution.
Speeded up the opening of model windows.
Speeded up the creation of new families containing large numbers of objects.
Various minor bug fixes and improvements.
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Version 1.3.2 - 8th June 2006
Added Undo and Redo keystrokes to text components.Added contextual popup menus.
Added a fault reporting facility.
Improved the startup time.
Improved the layout of the preferences dialog so that all the tabs now fit horizontally.
On Windows, improved some of the menu item mnemonics, mainly in the Edit menu.
On Windows, moved the list of recently used simulations from the File / Open Recent menu to the File menu.
Fixed several bugs that could cause model windows to function incorrectly in certain circumstances.
Various minor bug fixes and improvements.
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Version 1.3.1 - 22nd April 2006
Added mouse wheel functionality to model windows.Made it easier to enter carriage returns in a simulation's notes.
Organised the sample simulation notes into sections.
On Windows, added numbers and mnemonics to the menu items in the list of recent files.
On Mac OS X, corrected a bug which could cause multiple file dialogs to be visible simultaneously.
Various minor bug fixes and improvements.
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Version 1.3 - 28th March 2006
Added the View / Show / Velocities command to display velocity vectors on model windows.Added the View / Show / Acceleration command to display acceleration vectors on model windows.
Added the Edit / Merge Object command to merge the selected object with its parent.
Greatly improved the tool bar customization facility.
Added a preference option to display tool icons on menu items in addition to the usual text.
Many minor bug fixes and improvements.
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Version 1.2.3 - 22nd December 2005
Solved the serious graphics performance problems on Mac OS X 10.4 (Tiger).Speeded up simulation evolution (by approximately 15%).
Added recent discoveries to the Solar System sample simulations.
Various minor bug fixes and improvements.
Version 1.2.2 - 22nd November 2005
Speeded up the graphics drawing (by approximately 25%).Added the Help / AstroGrav Tutorial menu item.
On Windows, changed the startup default from Create New Simulation to Open Latest Simulation.
Added the tutorial simulation to the default recent file list.
Various minor bug fixes and improvements.
Version 1.2.1 - 3rd October 2005
Greatly accelerated the graphics drawing on Mac OS X 10.4 (Tiger).Made the Help / AstroGrav Help command automatically locate the latest version of the application's documentation.
Provided a much improved Read Me document.
Various minor bug fixes and improvements.
Version 1.2 - 6th September 2005
Enhanced the licensing software.Made the sample simulations read-only to prevent them from getting accidently overwritten.
Version 1.1 - 6th August 2005 (Mohrle's Birthday)
Added the Help / AstroGrav Home Page command.Added the Help / Purchase License... command.
Version 1.0.2 - 12th July 2005
Corrected a bug that could cause the center of mass fixed point to sometimes be incorrect.Made dragging .ast files onto the application icon work correctly on Windows.
Corrected a model window bug which caused object name brightnesses to be incorrect for very low magnifications.
Improved the license validation user messages.
Various minor bug fixes and improvements.
Version 1.0.1 - 22nd June 2005
On Windows file save dialogs, added a message asking the user if it is OK to overwrite the file if it already exists.Modified the File / Open Recent menu to distinguish between identical filenames by showing (partial) paths.
Added a separate ICNS icon for .ast files on a Mac.
Corrected the bug that made model window views 'flip' 180 degrees when dragged from a point to the exact same point.
Various minor bug fixes and improvements.
