Wolfram Alpha

I just got the Wolfram Alpha app, and its great, like you can look up anything. As an example, did you know that right now the star Regulus is at an altitude of 52deg 30', and an azimuth of 173deg 30' (SSE)? And its next rise will be tomorrow at 3:37 pm? And that dry sand's angle of repose is 35 degrees? And if you had 2500 liters of hard coal, you would have a pile with a base radius of 1.02 meters? And an F#4 has a frequency of 369.994 hertz? Yeppers. Plus there is a website which is free. http://www.wolframalpha.com/ I seriously recommend that anyone reading this blog should at least take a look at it.