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The Sky Tuesday 21 May 2013
The Sun and ...
In Stockholm: The Sun rises today at 4:05, 14 minutes earlier than one week ago. The Sun sets at 21:25, 15 minutes later than one week ago.
In Stockholm: Today the Moon sets at 2:25, and rises at 16:25.
In 4 days: Full moon at 6:26 (Swedish time)
Future total and annular solar eclipses until 2020.
Maps by Fred Espenak, NASA.
A few links:
SNIPPETS -- free sources in C, C++ and asm. Hundreds of routines.
The original http://snippets.snippets.org has vanished, this was the main content.
Free C source for computing sunrise/set times, with comments.
Nonexistent celestial bodies
USNO's ICE (Interactive Computerized Ephemeris), which gives high-precision
planetary positions from 1800 to 2050, can be downloaded
(size somewhat less than 1 MByte). Info about ICE can be found
How to compute planetary positions
Tutorial on computing planetary positions
Computing rise/set times
Photometry/radiometry and astronomy
Time, GMT, UTC, TAI and GPS
ZC (Zodiacal Catalogue) online
The world's largest telescopes
TV broadcast systems worldwide
HaloSim ver 3 - freeware halo simulator
Computer simulation of a complex halo display as would be imaged by a
whole sky fisheye lens. The sun is 27 degrees above the horizon.
This image was generated by Version 3 of the
freeware program HaloSim, available for download at
http://www.atoptics.co.uk/halo/halfeat.htm. It runs under Windows
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