International Quiet Sun Year

Fischer 1457-1462 | Michel 1606-1611 | Year of issue 1965 | People's Republic of Poland

The International Quiet Sun Year (IQSY).

1457 IQSY emblem	1458 IQSY emblem

1459 Radio telescope, solar observatory	1460 Radio telescope, solar observatory

1461 Solar system	1462 Solar system

Glossary

The period from 1 January 1964 to 31 December 1965, near solar minimum, when solar and geophysical phenomena were studied by observatories around the world and by spacecraft to improve our understanding of solar-terrestrial relations.

Translations

Międzynarodowe lata spokojnego słońca = The international year of the quiet sun.

Resources

Sun, solar
Quiet sun (Encyclopedia of astrobiology, astronomy and spaceflight)
International Quiet Sun Year (checklist of postal items concerning the IQSY)
Radio telescope
Observatory
Solar system