What's Up Now  A Virtual Planisphere  Using HTML5's canvas
element and some Javascript, this page shows what's visible in
the sky at a specific location and time. The view is what you
would see if you were lying on the ground looking up, with your
head pointing north. In this position, east is on your left,
west on your right, and south toward your feet.  Apparently your
browser doesn't support the HTML5 canvas element. Sorry about
that.  Date and time North latitude East longitude  Initially,
the latitude is set at 40°N, the longitude is estimated from
your computer's time zone setting, and the time is the current
time on your computer. The Use My Location button uses HTML5
geolocation. The spec requires the browser to ask your
permission to do this, but the program doesn't send that data
anywhere. It stays inside the code running on your machine. You
can use the little arrows to the right of the date field to step
the date and time in increments you choose. The latitude and
longitude are integers, since the