【實用書籍app】Sky Atlas for Tablets|最夯免費app-綠色工廠好玩App

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Sky Atlas is not planetarium or simulation software. It is designed analog to a paper atlas for the purpose of looking up sky positions of celestial objects. The electronic form takes advantage of zooming and selection of objects to be displayed or not -- possibilities which are not available to paper. The star chart is plotted on equatorial coordinates. A star chart can be saved to external memory card for documentation purposes, such as websites or blogs.

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In order to minimize installation package size, since version 1.07, large images are no longer packed in the installer. This includes deepsky, Messier and spacecraft images, as well as astronomical articles. At first application use these images will be downloaded from the internet and installed in the external memory card, thus less working memory load. All images can be downloaded any time for update purposes.

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The use of Sky Atlas is believed to be simple, intuitive and largely self-explanatory, yet requiring basic knowledge of astronomy and familiarity with your Android tablet.

The application operates in landscape, reverse landscape (internal sensors required) and portrait mode (where practicable).

Atlas Objects

Opens a list of object categories. Tap on a category to view available objects. Categories which contain a large number of objects are assigned a submenu (tap on screen's menu button) which allow to narrow down by various criteria depending on the nature of the category.

* Constellations

* Named Stars

* Nearby Stars

* Binary Stars

* Variable Stars

* View stars from other stars

* Exoplanets

* Messier Objects with images

* Bright Deepsky Objects with images

* Solar System Planets

* Dwarf Planets & Asteroids

* Comets

* Meteor Showers

* Hubble Objects

* Kepler Field Overlay

* Celestial Poles

References

This list of items is not directly related to the star chart, but to astronomical time-keeping, information and visualizations.

* Rise, set, twilight times, seasons

* Day & Night Visualization

* Planisphere

* Planet Phases in 3D

* Moon Atlas in 3D

* Moon Calendar

* Planetary Moons

* MSL Curiosity Station

* Pleiades Close-up

* Solar Eclipses

* Greek Alphabet

* Glossary

* Exoplanet Stories

* Zodiacal Signs

* Martian Moons

* Plutonian Moons

Computing

This section is for astronomical computing, such as current positions of the Galilean moons, orbit simulation, calculation of optical equipment performance and more.