- 10.1. What do the different symbols for deep-sky objects mean?
- 10.2. What do the different colors of Deep-sky objects mean?
- 10.3. Why are there so many more U.S. cities than in other countries?
- 10.4. How can I add a new custom location to KStars?
- 10.5. I have added a custom location to KStars that I no longer want. How do I remove it from the program?
- 10.6. Why do some objects disappear when I am scrolling the display?
- 10.7. I do not understand all the terms used in KStars. Where can I learn more about the astronomy behind the program?
- 10.8. I want KStars to start up with a time and date different from my system CPU clock. Is this possible?
- 10.9. I want KStars to start up with the simulation clock paused. Is this possible?
- 10.10. How accurate/precise is KStars?
- 10.11. Why do I have to download an improved NGC/IC catalog and Messier object images? Why not just include them as part of the KStars distribution?
- 10.12. I am really enjoying the beautiful images I have downloaded through KStars! I would like to share them with the world; can I publish a calendar featuring these images (or are there any usage restrictions on the images)?
- 10.13. Can I help contribute to future versions of KStars?
10.1. | What do the different symbols for deep-sky objects mean? |
The symbol indicates the object type:
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10.2. | What do the different colors of Deep-sky objects mean? |
Generally, the different colors indicate to which catalog the object belongs (Messier, NGC or IC). However, some objects have a different color which indicates that there are extra images available in the popup menu (the default “extras” color is red). | |
10.3. | Why are there so many more U.S. cities than in other countries? |
When we started KStars, we were unable to find a longitude/latitude database that covered the globe equitably. However, the KStars community is rapidly overcoming this problem! We have already received city lists from many users around the world. If you can contribute to this effort, please send us your list of cities and coordinates. | |
10.4. | How can I add a new custom location to KStars? |
If you would like to use a location that is not on the list, enter the relevant information (longitude, latitude, city name, province name, and country name), then press button. All fields must be filled, except the optional province field. You can also modify the values for an existing city, by simply changing the values in the window, and adding it to the list. | |
10.5. | I have added a custom location to KStars that I no longer want. How do I remove it from the program? |
You can easily remove a custom location from KStars by selecting it in the cities list and pressing the button. Note that you can not remove a KStars default city. | |
10.6. | Why do some objects disappear when I am scrolling the display? |
When the display is in motion, KStars must recompute the screen coordinates of every object in its database, which involves some pretty heavy trigonometry. When scrolling the display (either with the arrow keys or by dragging with the mouse), the display may become slow and jerky, because the computer is having trouble keeping up. By excluding many of the objects, the computational load is greatly reduced, which allows for smoother scrolling. You can turn off this feature in the Configure - KStars window, and you can also configure which objects get hidden. | |
10.7. | I do not understand all the terms used in KStars. Where can I learn more about the astronomy behind the program? |
The KStars Handbook includes the AstroInfo
Project; a series of short, hyperlinked articles about
astronomical topics that can be explored and illustrated with KStars.
AstroInfo is a community effort, like GNUpedia or Everything2. If
you'd like to contribute to AstroInfo, please join our mailing list:
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10.8. | I want KStars to start up with a time and date different from my system CPU clock. Is this possible? |
Yes; to start KStars with a different time/date, use the
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10.9. | I want KStars to start up with the simulation clock paused. Is this possible? |
Yes; to start KStars with the clock paused, simply add the
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10.10. | How accurate/precise is KStars? |
KStars is pretty accurate, but it is not (yet) as precise as it can possibly be. The problem with high-precision calculations is that you start having to deal with a large number of complicating factors. If you are not a professional astronomer, you will probably never have a problem with its accuracy or precision. Here is a list of some of the complicating factors which limit the program's precision:
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10.11. | Why do I have to download an improved NGC/IC catalog and Messier object images? Why not just include them as part of the KStars distribution? |
The author of the downloadable NGC/IC catalog has released it with the restriction that it may not be used commercially. For most KStars users, this is not a problem. However, it is technically against the KStars license (the GPL) to restrict usage in this way. We removed the Messier object images from the standard distribution for two reasons: to simply reduce the size of KStars, and also because of similar licensing concerns with a couple of the images. The inline images are significantly compressed to a very low quality from their original form, so I doubt there is a real copyright concern, but I did obtain explicit permission from the images' authors to use the few images for which there was any question about it (see | |
10.12. | I am really enjoying the beautiful images I have downloaded through KStars! I would like to share them with the world; can I publish a calendar featuring these images (or are there any usage restrictions on the images)? |
It depends on the image, but many of the images restrict against commercial usage. The Image Viewer's statusbar will usually contain information about the image's copyright holder, and what usage restrictions apply. As a rule of thumb: anything published by NASA is in the public domain (including all HST images). For everything else, you can pretty safely assume that the images may not be used commercially without permission. When in doubt, contact the image's copyright holder directly. | |
10.13. | Can I help contribute to future versions of KStars? |
Yes, definitely! Introduce yourself on our mailing list:
If you are not into coding, we can still use your help with i18n, docs, AstroInfo articles, URL links, bug reports, and feature requests. |