Emerald Observatory displays a wealth of astronomical information all on one screen, in a unique but understandable format. Information includes:
- 12- and 24-hour ordinary clock time
- Times of rise and set for the Sun, the Moon, and the 5 classical planets
- Times of the beginning and ending of twilight
- Heliocentric orrery (display of the planets in orbit around the Sun)
- Altitude and azimuth for the same bodies (one body at a time)
- Current phase and apparent orientation and relative size of the moon
- Current regions of day and night on a world map
- The Equation of Time, solar time, UTC time, and sidereal time
- Month, day, year, and leap-year indicator
- Daily alarm (delivered as local notification on iOS 4+ if app is not running)
- Eclipse simulator
- Displayed times are synchronized via NTP to "atomic clock" standard
- Uses iPad location, or the latitude and longitude may be set manually
A setting is available to allow the display to stay on continuously.
Tap on the display to move forward by a month, day, year, hour, or minute. A detailed manual for the operation of Emerald Observatory can be found at the "Emerald Sequoia LLC Web Site" listed below, at http://emeraldsequoia.com/eo/
If you are having any trouble with the application whatsoever, please see our FAQ on the support page listed below and then contact us through that page if your problem is not resolved. We take pride in responding promptly to all support email requests but we can't fix it if you don't report it (and we have no way to respond to Customer Reviews on iTunes).
(NTP requires Internet access. Like all apps Emerald Observatory can not change the device's internal clock.)
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Emerald Observatory for iPad FAQ
Is Emerald Observatory for iPad free?
Yes, Emerald Observatory for iPad is completely free and it doesn't have any in-app purchases or subscriptions.
Is Emerald Observatory for iPad legit?
✅ The Emerald Observatory for iPad app appears to be high-quality and legitimate. Users are very satisfied.
Thanks for the vote
How much does Emerald Observatory for iPad cost?
Emerald Observatory for iPad is free.
What is Emerald Observatory for iPad revenue?
To get estimated revenue of Emerald Observatory for iPad app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.
I’ve had this app since it was introduced many years ago. There is nothing even remotely similar to it, so I consider it unique among the tons of content out there.
As with every app that has been in the market for a long time, I hope the developers continue supporting it. The last update was done a year ago.
Perfection!
From my current Facebook post:
If you have even a casual interest in the night sky and own an iPad, you owe it to yourself to buy the Emerald Observatory app. I’ve been using it for over a decade now and it’s one of the few apps I truly love now just as much as the day I purchased it. The price is probably just a few dollars. As an instructional designer and technologist as well as a software developer, I’m simply in awe of how beautifully and perfectly this app is designed and the amount of information that is clearly displayed on ONE screen. Data visualization geeks and designers, take note! This is how the best of the best do it. Exquisite and elegant in every way.
The most awesome clock in the store! Think wallpaper! (Wish)
I am absolutely mesmerized when I open this app. There is so much there! I would really love it if it could be ported to screen wallpaper.
Wonderful App
I got this app when I get my first iPad, and I love it. It’s so beautiful, and it packs in so much information.
Awesome
The best clock app.
!
I don’t even know what to say, it’s so good.
Superior App
and beautiful.
Visually Stunning
This is probably the most stunning clock ever. It is amazing the information, dials, and representations presented on this clock.
Magnificent Union Of Form And Function
This is a splendid example of application development that is both a useful information center for Astronomy, as well as a beautiful timepiece. The dials are easy to read, and provide a wealth of useful data. Even if you have only a passing interest in the sky above, you will still have an intriguing display of several different ways to measure time. This app is an excellent investment for scholars of any age.
Just Outstanding
Absolutely love this app! So incredibly detailed, so beautiful! I’ve taken to keeping it up and running as my bedside clock. It’s perfect.