Ursa Astronomical Association

Tähtitieteellinen yhdistys Ursa ry

• Contact information
• A brief history of Ursa

Mailing lists

• METEOPTIC-L - mailing list for atmospheric (meteorological optics)

Sections

• Solar section
• Atmospheric optical phenomena section
• Aurora section
• Deep sky section ("Finnish Deep Sky section")
• Halo section ("Finnish Halo Observers Network")
• Lunar, Planetary and Cometary Section
• Mathematics and information technology
  • Ursa Software Library
• Meteor section

Miscellaneous material

• Astro Language - astronomy dictionary
  
• Model of the Solar system

Other Finnish astronomical associations

• Astronomical Association Jyväskylän Sirius
• Astronomical Association Warkauden Kassiopeia
• Porin Karhunvartijat - Astronomical Association of Pori
• Riihimäki Astronomical Association
• South Karelian Amateur Astronomical Association Nova
• Astronomical Association Lahden Ursa ry

Personal homepages

• Mika Pirttivaara
• Marko Riikonen