Tag Archives: Northern Hemisphere

The Northern Lights


Northern lights over Kulusuk, Greenland

Northern lights over Kulusuk, Greenland (Photo credit: Wikipedia)

The Northern Lights


The northern lights, or aurora borealis, are a luminous display of various forms and colors in the night sky of the Northern Hemisphere. They are caused by


Plasmasphere (Photo credit: Wikipedia)

high-speed electrons and protons from the Sun, which are trapped in the radiation belt above Earth and channeled toward the polar regions by Earth’s magnetic field. These electrically charged particles enter the atmosphere and collide with air molecules, exciting them to luminosity. Who coined the name “aurora borealis” for this phenomenon? More… Discuss


today event/celebration: Autumnal Equinox

Autumnal Equinox

English: The Earth at the start of the 4 (astr...

English: The Earth at the start of the 4 (astronomical) seasons as seen from the north and ignoring the atmosphere (no clouds, no twilight). Português: A Terra no início das 4 estações (astronômicas) como vista do norte e ignorando a atmosfera (sem nuvens, sem crepúsculo). (Photo credit: Wikipedia)

The sun crosses the plane of the earth’s equator twice a year: on or about March 21 (Vernal Equinox) and again six months later, on or about September 22 or 23 (Autumnal Equinox). On these two occasions, night and day are of equal length all over the world. In the Northern Hemisphere, September 22 or 23 is the first day of autumn. Autumnal Equinox Day is a national holiday in Japan, observed on either September 23 or 24 to celebrate the arrival of autumn and to honor family ancestors. More… Discuss

today’s holiday: Dog Days

Dog Days

The Dog Days are known as the hottest days of the year in the Northern Hemisphere, and usually occur in July and early August. In ancient times, the sultry weather in Rome during these months often made people sick, which they blamed on the fact that this was when Sirius, the Dog Star, rose at about the same time as the sun. There are many different ways of calculating which days in any given year are the dog days, but it is impossible to be precise; nowadays it is generally assumed that they fall between July 3 and August 11—slightly later than they occurred in ancient times. More… Discuss

Primates’ Philosophy: He who smiles in a crisis has found someone to blame…

Therefore: He who’s sad in a crisis has been accused of something he never did!