The longest day – Summer Solstice 21st June 2011

Solstice Sunset Credit:Adrian West

June 21st, 2011 is Summer Solstice – the longest day of the year.
This is the time when the Sun is at its highest or most northerly point in the sky in the Northern Hemisphere and when we receive the most hours of daylight. If you live in the Southern Hemisphere it is the reverse, so you will be having “Winter Solstice.”
Also known as “Midsummer” the Summer Solstice gets its name from the Latin for sol (sun) and sistere (to stand still). The Sun reaches its most Northerly point and momentarily stands still before starting its journey South in the sky again until it reaches its most Southerly point “Winter Solstice”, before repeating the cycle. This is basically how we get our seasons.

It’s not actually the Sun that moves North or South over the seasons although it may appear so. It’s the Earths axial tilt that causes the Sun to change position in the sky as the Earth orbits the Sun throughout the year.

The angle of the Sun and the Earth's seasons. Image credit: NASA

Summer Solstice/ Midsummer is steeped in ancient folklore especially in Northern Europe with the most famous place directly related to it being Stonehenge, where the sun has been worshiped for thousands of years.

Stonehenge Credit: bistrochic.net

The Sun reaches its most Northerly point in the sky at 17:16 UTC momentarily and from that point forward starts to make its way South. This means the days will get shorter and shorter until Winter Solstice in December.

Read More

Alonso quickest in Canada ahead of Vettel

 Formula One leader Sebastian Vettel smashed into the 'Wall of Champions' while Ferrari's Fernando Alonso set the practice pace on a crash-filled Canadian Grand Prix Friday.
Double world champion Alonso roared around the Circuit Gilles Villeneuve in a best time of one minute 15.107 seconds offering hope that Ferrari, without a pole since Singapore last September, might be able to take the fight to Red Bull.
The sunny afternoon session was interrupted by several crashes with Sauber's Japanese driver Kamui Kobayashi, Belgian Jerome D'Ambrosio for Virgin and Force India's Adrian Sutil all causing delays when they skidded off the track into the wall.
World champion Vettel, winner of five of the season's first six races and sure to be the man to reckon with again on Sunday, did his damage in the morning.
With 34 minutes remaining in the opening session, Vettel drifted wide coming out of the chicane into the home straight and joined a list of illustrious names to have hit the notorious wall over the years.
While the 23-year-old German was unhurt, the right side of his Red Bull suffered heavy damage.
Vettel was one of the first on track in the afternoon and set a time that immediately sent him to the top of the timing screens, remaining there until finally being nudged into second by Alonso.
The champion ended up with the day's second best time of 1:15.476.
Brazilian Filipe Massa was third quickest in the afternoon followed by the McLarens of Lewis Hamilton, a double winner in Canada, and fellow Briton Jenson Button.

Read More