LETTER : Perfect viewing of a total eclipse

Share
From Mr John Wright

Sir: I read with interest your articles about the recent total eclipse in India, because I was lucky enough to see one under perfect conditions in February 1953 in the northern Sudan. It was at 11am and, in February, clear skies were so guaranteed that four years earlier astronomers started writing to me in the Survey Department because they wished to come to observe it.

When it occurred, I was stationed 200 miles north of Khartoum; and as the local astronomical expert I had told the British and Sudanese there about its causes and what to expect, using white and black ping-pong bats, a lamp and a tennis ball etc.

On the day, we moved out into the desert to be on the path of totality and climbed a small hill. Two interesting phenomena occurred. First, which I had not foreseen, the dappled sunlight caused by chinks in a bush on the hill (which are of course elliptical images of the sun) turned into crescents as the moon advanced across it.

Secondly, which I had read about and was expecting, the tiny spot of light at the edge of the sun just before and after totality acted like a star and twinkled. This meant that the edge of the shadow was not sharp but a series of shadow bands; and these raced towards us across the desert at a thousand miles an hour as the Earth rotated under the images of the sun and moon. It was an awe-inspiring sight; and of course the shadow bands came from the East; so I was puzzled by your description of the eclipse moving south-eastwards in some of your articles about it.

Yours faithfully,

John Wright

West Wittering, West Sussex

React Now

  • Get to the point
Latest stories from i100
Have you tried new the Independent Digital Edition apps?
iJobs Job Widget
iJobs General

Recruitment Genius: 3rd Line IT Support / Senior Engineer / Support Analyst

£24000 - £32000 per annum: Recruitment Genius: An exciting opportunity has ari...

Recruitment Genius: Field Sales Executive - OTE £60,000

£25000 - £35000 per annum: Recruitment Genius: Recognised as one of the fastes...

Recruitment Genius: Operations Manager - Refrigeration

Negotiable: Recruitment Genius: This leading provider of refrigeration, mechan...

Ashdown Group: Head of Finance - Finance Manager - Central London - £70,000

£70000 per annum: Ashdown Group: Head of Finance - Financial Controller - Fina...

Day In a Page

Read Next
 

Daily catch-up: the endless and beginningless election campaign goes up and down

John Rentoul
Zoe Sugg, aka Zoella, with her boyfriend, fellow vlogger Alfie Deyes  

What the advertising world can learn from Zoella's gang

Danny Rogers
No postcode? No vote

Floating voters

How living on a houseboat meant I didn't officially 'exist'
Louis Theroux's affable Englishman routine begins to wear thin

By Reason of Insanity

Louis Theroux's affable Englishman routine begins to wear thin
Power dressing is back – but no shoulderpads!

Power dressing is back

But banish all thoughts of Eighties shoulderpads
Spanish stone-age cave paintings 'under threat' after being re-opened to the public

Spanish stone-age cave paintings in Altamira 'under threat'

Caves were re-opened to the public
'I was the bookies’ favourite to be first to leave the Cabinet'

Vince Cable interview

'I was the bookies’ favourite to be first to leave the Cabinet'
Election 2015: How many of the Government's coalition agreement promises have been kept?

Promises, promises

But how many coalition agreement pledges have been kept?
The Gaza fisherman who built his own reef - and was shot dead there by an Israeli gunboat

The death of a Gaza fisherman

He built his own reef, and was fatally shot there by an Israeli gunboat
Saudi Arabia's airstrikes in Yemen are fuelling the Gulf's fire

Saudi airstrikes are fuelling the Gulf's fire

Arab intervention in Yemen risks entrenching Sunni-Shia divide and handing a victory to Isis, says Patrick Cockburn
Zayn Malik's departure from One Direction shows the perils of fame in the age of social media

The only direction Zayn could go

We wince at the anguish of One Direction's fans, but Malik's departure shows the perils of fame in the age of social media
Young Magician of the Year 2015: Meet the schoolgirl from Newcastle who has her heart set on being the competition's first female winner

Spells like teen spirit

A 16-year-old from Newcastle has set her heart on being the first female to win Young Magician of the Year. Jonathan Owen meets her
Jonathan Anderson: If fashion is a cycle, this young man knows just how to ride it

If fashion is a cycle, this young man knows just how to ride it

British designer Jonathan Anderson is putting his stamp on venerable house Loewe
Number plates scheme could provide a licence to offend in the land of the free

Licence to offend in the land of the free

Cash-strapped states have hit on a way of making money out of drivers that may be in collision with the First Amendment, says Rupert Cornwell
From farm to fork: Meet the Cornish fishermen, vegetable-growers and butchers causing a stir in London's top restaurants

From farm to fork in Cornwall

One man is bringing together Cornwall's most accomplished growers, fishermen and butchers with London's best chefs to put the finest, freshest produce on the plates of some of the country’s best restaurants
Robert Parker interview: The world's top wine critic on tasting 10,000 bottles a year, absurd drinking notes and New World wannabes

Robert Parker interview

The world's top wine critic on tasting 10,000 bottles a year, absurd drinking notes and New World wannabes
Don't believe the stereotype - or should you?

Don't believe the stereotype - or should you?

We exaggerate regional traits and turn them into jokes - and those on the receiving end are in on it too, says DJ Taylor