Astronomy Calculator is a series of astronomical calculations.
Web and iPhone Applications are a suite of astronomy applications for the web and iPhone.
Below are a few of our favorite calculators. These calculators are part of the Astronomy Calculator and include Date of Easter, Leap Year and Local Sidereal Time to Greenwich Sidereal. More will be added as we create them. Click the icon below to view the calculators.
Clear Sky Tonight has a number of areas of interest. Below you will find interesting information from our Blog and our News. We also have a Forum. We have created a number of articles about astronomy, the Night Sky, Telescopes and Astrophotography.
Astronomy compels the soul to look upwards and leads us from this world to another.
Astronomy taught us our insignificance in Nature.
Ralph Waldo Emerson
My goal is simple. It is a complete understanding of the universe, why it is as it is and why it exists at all... We see the universe the way it is because if it were different, we would not be here to observe it.
- Angle Degrees to Decimal Degrees
- Decimal Degrees to Angle Degrees
- Right Ascension to Hour Angle
- Hour Angle to Right Ascension
- Equatorial to Horizon
- Horizon to Equatorial
- Mean Obliquity of the Ecliptic
- Ecliptic to Equatorial
- Equatorial to Ecliptic
- Equatorial to Galactic
- Galactic to Equatorial
- Angle between two celestial objects
- Rising and Setting
- Carrington Rotation Number
- Selenographic Moon
- Selenographic Sun
Clear Sky Tonight - astronomy for the rest of us
Check out our mobile version of Astronomy Calculator.
- Weather Camera - We have been working on setting up a weather camera on our Woicik personal website. We have a Woicik Current Weather image posted every 5 minutes along with a Woicik Weather Blog which contains a daily time-lapsed weather video. You can read more about the setup and configuration on the Clear Sky Tonight blog with the category weather.
- Website Launch - We launched this website.