RedShift 7 for iTouch/iPhone/iPad (November 18, 2010)

Posted: November 18, 2010 by tedbade in Software Reviews, Space Exploration
Tags: , , , ,

By Ted Bade, © Copyright 2010, All Rights Reserved.

Vendor: United Soft Media Verlag GmbH
Price: $11.99
E-Mail: info@usm.de
Product Site: http://www.redshift-live.com/en/

Introduction

RedShift is an astronomy application for the iPod touch/iPhone/iPad. This program offers the features you would expect from an astronomy title and has a couple of useful unique options. It also makes use of the device’s built-in compass to act as an information window to the sky.

This is the second Astronomy app for portable devices that I have reviewed here. So I am going to make references to my previous review of Distant Suns for comparison reasons. Redshift has all of the basics. You tell it where you are located and it will show you the sky, adding labels to identify the objects. You can increase or decrease the Field Of View (FOV), using a gesture. Tapping on a star or other object will provide more information about it. The program includes a huge database of objects, but is more designed for naked eye viewing of the sky then as an assistant for telescope viewing.

Getting Started

When you first start Redshift, it loads and then plays a neat animation of your view, moving from a point off the earth and flying down to the location you have set as your home location. Then the sky is filled with stars. When you D-tap on an object seen on the screen, a red hued information bar appears on the top providing links to the program’s built in database of information, a link to the Wikipedia entry for that object, a rocket icon that lets you take a “flight” to that object, and a lock for locking the object in the window. The Wikipedia link is pretty neat, the Wiki page for the selected object opens in a window over the app screen. Whatever information and pictures the page has can be scrolled to. You can click on the links within the Wiki page, to see even more information. Essentially you are using a very basic web browser within the application. To return to the view of the sky, there is a “back” button. The biggest issue with this feature is that there is no way to navigate back and forth between pages in the simple browser window. The Wiki page offers links to lots of information. When you click on one, it loads the page. But Redshift provides no means of getting back to the previous page. The “back” button only brings one back to the main Redshift window. This makes a potentially terrific educational feature simply a good feature.

Another really cool feature on this information bar is a link to the devices compass feature. If you touch it, arrows on the screen direct you to move the device back and forth and up and down, until you are facing the object! So not only can you look at the simulated sky, but you can use the application to actually find where an object is in the real time sky. Making this a truly terrific way to learn how to identify what is up there. If you don’t select an object, and turn the compass on, Redshift will show the sky you are facing with names and constellations shown – a neat tool.

Side note: I didn’t have a compass device when I did my previous review of Distant Suns. I now have an iPad and can make use of its compass. Distant Suns also makes use of the device’s compass, and I will make an effort to include extra information in the previous review.

There are some options for labeling the sky in Redshift, although not as many as I would like. You can change the star density up and down using a slider, which decreases and increases the magnitude of stars that show as a dot. Another slider increases or decreases the density of labels displayed on the screen.  But this mostly affects stars. Other types of objects are in the database, but Redshift doesn’t provide symbols or labels to show their location unless the field of view is small enough to show the object. If you go to the extreme density of labels, some deep space objects will appear, but the screen is way to cluttered with information to be of use. Which means Redshift isn’t a good choice for locating objects that require a telescope to see.

However, the objects actually there. Some larger objects, like the North America Nebula, can be seen graphically on the screen, and a label for it will appear if the FOV is small enough. I know other objects are represented because, as I was perusing the sky of Redshift, I saw a pixel flicker. I thought there was a defect in the program, so I tried to figure out what was causing it. It turned out to be the crescent nebula. The program was trying to represent the image of the crescent nebula with one pixel, as the angle of view to the object changed, the light of the image changes, so the one pixel representation flickered. When I shrunk the FOV down enough, a very nice image of this nebula appeared then grew. All deep space objects in Redshift are represented by photo-realistic images, which can be see when the FOV is small enough.

Redshift offers basic search features for locating objects that might not be visible, or that you might want to see a better image of. There is a feature called “Observatory” which lets you choose from one of four categories (Solar system, Stars, Constellations, Deep Sky) to search in. Selecting one provides an alphabetical list of well-known objects. Selecting an object first centers the sky on its location then changes the FOV until the object is visible. There is also a magnifying glass icon on the screen that lets you enter a text string to search for an object. You can search in any of the four categories or all of them. A history of your recent searches is kept so you can return to them. The text search is useful, but it is very basic. It browses names rather then looking for keyword matches. For instance, when searching for the Saturn nebula, you enter Saturn, and see two hits, one for the planet and one for the nebula. However, if you are looking for the little dumbbell nebula, enter the keyword dumbbell won’t find it, but entering “Little” will.

The photo-realistic image of the sky is very nice and this makes it easier to compare to the real sky. If you take it out at night and are concerned about night vision, Redshift has a button to instantly enable night vision, giving everything a red hue, which should not reduce your night seeing abilities while still being readable. You can also turn on or off the effects of daylight, giving you the ability to see what is going on in your day sky. A few images are provided to fill in the area below the horizon, which show to occlude the space below the horizon. If the Daylight effect is off, this image is translucent, allowing you to see through it. Markers on the display the altitude and azimuth of the screen center.

To zoom in on a part of the sky, or in more astronomy parlance, to change the FOV, you use the pinch and expand hand gesture. You can also use the rocket ship feature to zoom in on a particular object. It the object is a planet, you can simulate an orbit of it, a very nice effect. Zooming in is a lot of fun, but zooming out, back to the standard FOV using gestures is a bit of work. Luckily, there is an icon on the screen to restore the display. One issue I had with this feature is that it restores both the time and the view. I often find myself considering this evening’s sky at lunch. So I set the application’s time to evening and poke around a bit. When I use this button to return, I have to remember to reset the time to the evening, or I will find myself perusing the daytime sky! I know they can reset the view without resetting the time, because a simulated rocket flight to an object offers a reset which doesn’t reset time, just the view.

Redshift can make access of the devices location services and compass. If you let it, it uses location services to determine your location on earth. Since I am new to the iPad and I have the base model, I am skeptical about the function of its GPS. Luckily, RedShift used a neat model of the earth, showing a dot on the image of the earth representing your home location, as well the Lat/Long. Between the Touch and the Pad, Redshift has me somewhere in the vicinity of where I live, which is a whole lot more accurate then say, choosing the nearest major city, which is many miles away. You can also zoom into the image of the earth, and if you know your relative location, tap on the image to set it.

Conclusion

The only thing that I find lacking in programs like this is real time event information. For instance it won’t tell you the name of that satellite you see flinging across the sky, but more importantly, it can’t be used to help you find that neat comet that is there either. While I realize keeping track of thousands of satellites might be an issue, this program has a lot of power and should be able to at least offer some information about current events, things to see, and interesting conjunctions. There is no need to keep track of events that are not currently happening and all it would require would be to download somer data on a regular basis. That’s my wish for Redshift!

Overall Redshift is a pretty good astronomy application. I like some of the features and the image it shows of the sky is very nice. It is a good choice as an astronomy title for your device. It worked flawlessly for me. You won’t go wrong if you decide to give this a try. Personally, I don’t put this on the top of the list astronomy apps I have tried. Not because there is a problem, it’s my overall experience and preferences. I do like this program and give it a very good rating!

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Comments
  1. Peter says:

    Thanks for this well written review!

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