Jump to content
View in the app

A better way to browse. Learn more.

கருத்துக்களம்

A full-screen app on your home screen with push notifications, badges and more.

To install this app on iOS and iPadOS
  1. Tap the Share icon in Safari
  2. Scroll the menu and tap Add to Home Screen.
  3. Tap Add in the top-right corner.
To install this app on Android
  1. Tap the 3-dot menu (⋮) in the top-right corner of the browser.
  2. Tap Add to Home screen or Install app.
  3. Confirm by tapping Install.

16 வருடங்களின் பின்னர் தோன்றும் அபூர்வ சூரியகிரகணம்

Featured Replies

LIVE: http://www.bbc.co.uk/news/live/uk-31906556

 

யாழ்கள மட்டுறுத்தினருக்கு...
newsfirst.lkஇலிருந்து இச்செய்தி இணைக்கிறேன். இவ்விணையத்தள செய்திக்கு இங்கு அனுமதி உண்டா எனதேரியாது. newsfirst.lkக்கு அனுமதி இல்லை எனில் தயவு செய்து நீக்கி விடவும். நன்றி.

 
solar.jpg

அபூர்வமானதொரு சூரிய கிரகணம் வரும் மார்ச் மாதத்தில் நடக்கவுள்ளதாக விஞ்ஞானிகள் எதிர்வுகூறியுள்ளனர்.

இதுபோன்ற சூரிய கிரகணம் ஒன்று 1999 ஆம் ஆண்டிலேயே இறுதியாக நடந்துள்ளது. 16 வருடங்கள் கழித்து அது தற்போது நிகழவுள்ளது.

வரும் மார்ச் மாதம் 20 ஆம் திகதி பகல் வேளையை இரவு ஆக்கிரமிக்கவுள்ளது. இது சிலவேளை 90 நிமிடங்கள் நீடிக்கலாம் என்று கூறப்படுகிறது.

ஐரோப்பாவைப் பொறுத்தவரை சுமார் 84 சதவீதமான சூரிய ஒளி மறைக்கப்படலாம் என்று கூறப்படுகிறது.

மேலும் வடக்கு நோர்வே மற்றும் பரோயே தீவுகளில் முழு சூரிய கிரகணம் ஏற்படவுள்ளது.

மீண்டும் இதுபோன்ற ஒரு சூரிய கிரகணம் 2026 ஆம் ஆண்டில் தான் வரும் என்று விஞ்ஞானிகள் தெரிவித்துள்ளார்கள்.

 

Edited by Small Point

b5bb165e-8fa8-4463-9498-d985f4c570ba_500

 

சில நிமிடங்களுக்கு முன் ஜெர்மனியில்

  • தொடங்கியவர்

'Breathtaking' solar eclipse witnessed by millions

Millions of people in the UK and northern Europe have glimpsed the best solar eclipse in years.

In a solar eclipse, a swathe of the Earth is plunged into darkness as the Moon comes between us and the Sun.

This process began at 07:41 GMT and the deepest part of the Moon's shadow touched the Earth's surface at 09:13 GMT. In the UK the darkness peaked at about 09:35.

Experts are warning people not to look directly at the phenomenon.

This is because even during the eclipse, looking directly at the Sun causes serious harm - but there are ways to watch the eclipse safelyand many people are looking for a chance to do so.

Within the UK, those opportunities are heavily dependent on the cloud cover that currently shrouds much of the country.

But from an aeroplane above the Faroe Islands, a BBC camera captured the eclipse reaching totality at 09:41 GMT.

_81788097_caibq1kwgaati55.jpg'Baily's beads' were visible at the fringe of the eclipse when it reached totality

The deep shadow forms first in the North Atlantic, before sweeping up into the Arctic Circle and ending at the North Pole.

The UK will not see a solar eclipse on this scale again until 2026, but the British weather is not being especially cooperative.

Nonetheless, all parts of the UK are in line to see at least 83% of the Sun's disc obscured by the Moon.

The eclipse is a morning show.

The exact moment of greatest darkness for UK skywatchers will be dependent on the location.

_81764896_eclipse_uk_624map.gifCloud may obscure the view of the eclipse for many in the UK. Viewers in Cornwall will get the first chance of seeing the eclipse, but areas of Lincolnshire, the Midlands, southern Wales , as well as some parts of Scotland may get the best show

Penzance, in Cornwall, for example, has this moment at 09:23 GMT, whereas for Lerwick in the Shetland Islands, it happens at 09:43 GMT.

For the Shetlands, the eclipse is very nearly total at 97%.

To experience totality requires going further north still.

Ocean darkness

However, few land areas fall directly in the path of the Moon's deepest shadow - its so-called umbra, and seabirds will probably get the best eclipse experience.

The period of greatest darkness - nearly three minutes - will occur over a spot in the Norwegian Sea, a little below the Arctic Circle, at 09:46 GMT.

Many professional and amateur astronomers have positioned themselves in the Faroe Islands, where the capital city of Torshavn gets totality for a full two minutes, beginning just before 09:41 GMT.

And those who could not book a flight or a hotel for the Faroes have gone to Svalbard, where the capital city of Longyearbyen witnesses two-and-a-half minutes of totality, starting shortly after 10:10 GMT.

_75306515_line976.jpg

An extraordinary sight

_81787721_hi026406815-1.jpg

How to watch the eclipse safely

Why don't we see an eclipse every month?

_75306515_line976.jpg

Wherever people view the eclipse, they are strongly encouraged to do so in a safe way.

For many, this will be the first such event they have experienced while owning a smartphone, and they may be tempted to use the device to get a shot of the Moon passing in front of the Sun.

_81787686_hi026406924.jpgEclipse watchers in southern England

Of itself, this action is not dangerous, but there is a risk of looking into the Sun around the edge of the phone as the screen is lined up.

It would be much safer, say experts, to go to one of the many well-organised public events where there will be specialist telescopes, solar eclipse viewing glasses and simple pinhole projection cameras.

Spoilsport?

The internet will be a good option, too, especially if the weather disappoints.

Scientific agencies have planes and even satellites gathering video to relay on the web and on television.

The weather always has the potential to play spoilsport, and early forecasts suggested thick cloud would cover much of the UK at the critical times.

A cold front is pushing south over the country and it may be that only a lucky few - most likely across the English Midlands and perhaps north-east Scotland - will get a glimpse of clear skies.

_81764897_eclipse_globe_624map.gif

Irrespective of the cloud cover, scientists say citizens can still help them with their research.

A University of Reading team wants to learn more about how the atmosphere behaves as the Moon's shadow runs over the Earth.

The National Eclipse Weather Experiment (NEWEx) needs people to record conditions at their locality.

Prof Giles Harrison explained: "This is the first big partial eclipse to happen in the UK since 1999, and the next one isn't until August 2026, so this is a once-in-a-generation opportunity.

"By observing what happens on Friday we are effectively turning the skies of Britain into a giant weather lab, giving us a rare chance to see what happens when you 'turn down the Sun'.

"This will give us a precious insight into how the Sun influences the clouds and wind, as well as more obvious effects, such as temperature.

"By improving our understanding of how the weather works, we're better able to predict it, meaning scientists can further improve weather forecasts."

'Eclipse wind'

One phenomenon the experiment hopes to investigate is the "eclipse wind".

This refers to changes in the breeze that eclipse observers have reported as darkness falls.

Oxford University scientists are using the event to try to understand how eclipses affect electricity grids.

The deep shadow will reduce the output from solar panels, which now supply a significant proportion of power needs right across Europe.

The researchers will look to see how this dip in performance impacts the stability of grid networks.

Next year will have a total solar eclipse, too.

That will occur on 9 March, and will cross Sumatra, Borneo, Sulawesi, and extend out over the Pacific.

http://www.bbc.co.uk/news/science-environment-31965456

Archived

This topic is now archived and is closed to further replies.

Important Information

By using this site, you agree to our Terms of Use.

Configure browser push notifications

Chrome (Android)
  1. Tap the lock icon next to the address bar.
  2. Tap Permissions → Notifications.
  3. Adjust your preference.
Chrome (Desktop)
  1. Click the padlock icon in the address bar.
  2. Select Site settings.
  3. Find Notifications and adjust your preference.