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The Sky Monday 27 March 2017

Sunspot data from Brussels The Sun and ... About the Moonthe Moon

In Stockholm: The Sun rises today at 6:31, 20 minutes earlier than one week ago. The Sun sets at 19:17, 16 minutes later than one week ago.
In Stockholm: Today the Moon rises at 6:41, and sets at 18:20.
Tomorrow: New moon at 4:58 (Swedish time)

Future total and annular solar eclipses until 2020. Maps by Fred Espenak, NASA.

Astronomical events

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 here! (size somewhat less than 1 MByte). Info about ICE can be found here!

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

Freeware Halo simulator

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

Send mail to: pausch@stjarnhimlen.se