Stronger Sun Makes Earth Cool’ Not HOT

Contrary to the belief that an increase in solar activity from the Sun heats up Earth too, scientists have found that it’s quite the opposite. Based on a three-year snapshot of time between 2004 and 2007, scientists at the Imperial College London found that as solar activity waned at the end of one of the Sun’s 11-year cycles, the new data shows the amount of light and heat reaching the Earth rose rather than fell.

They also believe it may also be possible that during the next upturn of the cycle, when solar activity increases there might be a cooling effect at the Earth’s surface. Long-term analysis suggests it actually provides further evidence that the heating of the planet is more than a natural, cyclical phenomenon.

Over the past century, overall solar activity has been increasing and should therefore cool the Earth, yet global temperatures have increased. These results are challenging what we thought we knew about the sun’s effect on our climate,” The Telegraph quoted Professor Joanna Haigh as saying. “However, they only show us a snapshot of the sun’s activity and its behaviour over the three years of our study could be an anomaly,” she added.

Source

Posted in opinions, Solar System, Space | Leave a comment

7 Things You Never Knew About Our Solar System

Guest Post by Beatrice Owen

The kids of today have many more things than our generation did; however, one thing they cannot ever hope to see is a clear sky filled with stars and free of pollution, unless they live in rural locations where the dust and grime of industrialization has not yet polluted the clean air and the clear skies. One of the best experiences of my childhood was lying on our lawn or terrace and gazing up at the night sky – occasionally, my siblings and I were lucky enough to see a shooting star. And although our wishes never came true, we continued to gaze into the night and wonder about the mysteries that our solar system held. There are hundreds of secrets that are waiting to be discovered, and the ones that we know as of now include:

  1. The planet Mars has two hemispheres that are startlingly different from each other – while the upper half of the red planet is almost flat, its lower half is riddled with long ranges of high mountains.
  2. Most of us know that Venus is the only planet that rotates in the clockwise direction. However, not many people know that Uranus is the only planet that rotates at a tilt – while all the other planets stand upright with their poles perpendicular to the sun, Uranus lies down with one pole facing the sun for long periods as it rotates around its axis.
  3. Of all the solar bodies that have been discovered and studied so far, Titan, one of Saturn’s moons is closest in composition to the Earth. Titan’s atmosphere is only one and a half times thicker than that of the Earth, and it comprises 95 percent Nitrogen (Earth’s atmosphere too is 80 percent Nitrogen).
  4. Ganymede, the largest of all moons in our solar system and a moon of Jupiter, is the only moon to have a magnetosphere similar to that of the Earth which protects it from the sun’s solar winds.
  5. The sun’s South Pole is cooler than its North Pole – this fascinating fact was picked up by the solar probe Ulysses which revolved around the sun for close to two decades; it was launched from the space shuttle Discovery using Jupiter as a gravitational catapult so that it orbited the sun around its poles rather than around its equator.
  6. More on the sun – the atmosphere of the sun is hotter than its surface. It’s a surprising fact that defies all the known laws of Physics, but it’s true nevertheless.
  7. There are other planetary systems similar to our solar systems – these planets, known as extra-solar planets, orbit stars similar to our sun, and their discovery opens up the possibility that there may be other planets similar to Earth that hold other life forms.

It’s a fascinating whole new world out there, one that holds immense possibilities for exploration and new discoveries. Only time will tell what we’re likely to come across in the course of the journeys being undertaken by the various probes launched by space shuttles and orbiting the outermost planets of our solar system and beyond.


This guest post is contributed by Beatrice Owen, she writes on the topic of bachelors of science . She welcomes your comments at her email id: owen1.beatrice(@)gmail(.)com.

Posted in Guest Post, Space | 1 Comment

Peru Mines Bird Excrement on Islands

It was a treasure for the Incas, the cause of a war, and once a backbone of Peru’s economy. Now as the world hungers for sustainable resources, bird excrement is once again as prized as gold.

Handful of islands off the nation’s Pacific coast are literally dripping in tons and tons of one of its most historic treasures: guano.

Here millions of birds, fed by anchovy-rich waters, poop around-the-clock, discharging a dirty, potent, fishy cocktail of phosphates and nitrates.

Nutrient-rich bird excrement, guano, sells for about 250 US dollars a ton.

read more here


Posted in BIODIVERSITY, Countries, earth, Ecosystem | Leave a comment

ISRO Satellite Resourcesat-2 will Assist Ships in Distress

The Indian Space Research Organisation (Isro) will soon join a select group of institutions providing rescue and relief support to ships in distress across the globe. India’s Resourcesat-2, the remote sensing satellite to be launched this December will carry on board a state-of-the-art Space-Based Automatic Identification System (AIS-SB) meant to track ships and report if they are in trouble, said an Isro spokesman. “The payload was built by COMDEV of Canada, a group known for its expertise in space engineering and hardware,” S. Satish, director (public relations and publications) told Deccan Chronicle. “The AIS-SB will monitor the movement of all ships registered with us on a round-the-clock basis irrespective of their location. We will be able to offer instant rescue and relief operations to the ships if there is any accident.” He said this will be the first time an instrument of this kind will be used in an Indian satellite. Mr Satish also pointed out that Isro’s move to have a space-based automatic identification system of its own was in response to the rapid growth of the shipping industry globally. “Any distress call will be picked up by the AIS-SB and relayed to the agencies concerned for immediate action,” he added. Bhaskar Kunhi, chief pilot, Cochin Port Trust, welcomed the AIS-SB. “Our sailors are dependent on INMARSAT, the international marine satellites for all communication purposes.

The AIS-SB will make it easy for our ships to communicate much faster,” he said. Mr Satish pointed out that a similar space-based automatic identification system had played a pivotal role in providing security for the Vancouver Olympics held earlier this year.

source

Posted in India, Remote Sensing 101, Satellites | Leave a comment