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The Sky Thursday 17 May 2012

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

In Stockholm: The Sun rises today at 4:12, 15 minutes earlier than one week ago. The Sun sets at 21:17, 15 minutes later than one week ago.
In Stockholm: Today the Moon rises at 2:50, and sets at 17:34.
In 4 days: New moon at 1:48 (Swedish time)

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


Astronomical events

In 4 days: Annular solar eclipse, visible in China, most of Russia, southeastern Asia, the Philippines, Indonesia, the Arctic, and most of North America. Annular in southeastern China, southern Japan, the Pacific Ocean, and western USA.
In 20 days: Transit of Venus 22:04 - 04:54 UT. Visible in North and Central America, Greenland, the Pacific Ocean, AustralAsia, Asia, eastern Afrika, and Europe except Portugal and western Spain.

Rise/set times for the Sun, Moon and Planets in 2011 from 22 different cities in Sweden (in Swedish).
Astronomical events this month and next month (in Swedish)



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

ICE

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

Halo 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 HALO, available for download at http://www.sundog.clara.co.uk/halo/halosim.htm. It runs under Win-95/98/ME/NT/2000


Send mail to: pausch@stjarnhimlen.se