Thoughtful Posts and Articles

By Anil Kumar Gupta CEO @ HiTech-on-web.com Twitter @hitechit

The impact of humanity on the Earth better seen than from space, and never is it more noticeable than at night. Scientists use satellite photographs of artificial lights to chart the spread of urbanizing, but such photographs also tell another story, that of energy wastage, bathing urban skies in a permanent twilight. that obscures our view of the wider Universe we inhabit. Light pollution, as it is termed, is a growing concern to environmentalists as well as astronomers. The photograph at the right, taken from the Space Shuttle, offers a closer view of the bright lights on the northeastern seaboard of the United States, looking obliquely from the north. 

A Meteorite that struck in prehistoric times.

This meteorite struck near Hoba West, Namibia, in prehistoric times. Found in 1920, it weighs 60 tonnes, one of the largest objects to survive its impact.3. Found in the Atacama Desert, Chile, in the early19th century, this stony-iron meteorite was forged during the evolution of the Solar System. Larger meteorites, whether or not they are comets remnants, have had a steady, and often drastic, influence on the evolution of the planets -the Earth included. Some that enter the Earth's atmosphere never make it to the surface. Between1975 and 1992, American satellites recorded 136 explosions in the upper atmosphere, all probably small would-be meteorites.

Flare of the Sun (Solar Flare)

This prominence from Sunspots can measure as much as 50,000 kilometers (31,000 miles) across, July 1999 was particularly large. They are convenient indicators of the Sun's overall level of activity from the Sun. Erupting prominences, can affect and, therefore, of the influence the Sun will exert upon the Earth. For example, communications, navigation systems, radio signals from the Sun can be directly related to sunspots. In fact a graph even power grids, while also producing showing sunspot activity for a given period looks almost identical to a graph auroras visible in the night skies. that shows solar radio emission for the same period. Radio signals can tell us of the existence of an otherwise obscured sunspot, and the sunspot itself mayflower into a prominence or a flare that will disturb Earth's region of space. Both prominences and flares appear as violent displays of luminous solar debris and generally may be seen as clouds of ionized matter standing out from the Sun's limb or as characteristic markings on the disc itself. But there is a difference. Prominences linger much longer on the solar surface than flares. And prominences are seen as cascades of debris that may move downward along magnetic lines to the solar surface, sometimes in the form of arches that can span many tens of thousands of miles. Thus the material that forms a prominence is largely confined to the solar atmosphere. On the other hand , flares characteristically leap out from a single point of disturbance and form plasma blast. If it is in the path of this plasma tongue, the Earth will soon experience a magnetic storm with its attendant radio interference and aurora displays. It was also observed that aurora often followed a flare-up of explosions on the Sun's surface.

Yahoo news for "The Earth and Sky" is given below:

Mon, 21 May 2012 14:29:09 -0700 Venus and Crescent Moon to Perform Final Night Sky Show We all know how, after a great theatrical show has concluded the actors come out for a final bow.  Well, in a way, we're nearing the end of a great celestial show that that has been going on for many months and the two main characters   Venus and the moon   will soon be taking their final bows.

Mon, 21 May 2012 07:56:12 -0700 The Glowing Spider-Worms of New Zealand Imagine you are a tiny caddisfly pupa. When you emerge from your pupal case, it is dark, but not pitch black, and high above you, you see the faint glow of a starry sky. On new wings, you rise. Cue angelic voices. Suddenly, you struggle against an invisible barrier. Cue scary cello. You begin to inch higher and higher. Above you glows a star. Except now, too late, you see that the star is ...

Mon, 21 May 2012 00:50:21 -0700 Trans-Pacific 'ring of fire' eclipse wows sky-gazers Millions of sky-gazers got the spectacle of a lifetime as a "ring of fire" solar eclipse crossed the Pacific from Asia to the United States, where it triggered whoops at festive viewing parties.

Fri, 11 May 2012 15:09:58 -0700 Velvet Sky crashes to Earth MORE "Velvet Pie in the Sky". This was how an advocate described a last-ditch attempt by low-cost airline Velvet Sky to stay aloft yesterday, citing a another possible business rescue plan involving the Malawi government.

Mon, 21 May 2012 13:15:29 -0700 Millions Take A Seat To Watch Sun's Spectacle Over Earth [ Video 1 ]   Video 2 ] Lee Rannals for RedOrbit.com Millions of viewers across the U.S. and Asia were able to see the sun and moon's performance on Sunday, while others battled clouds and bad weather. Watchers from the Western U.S. towards eastern Asia were able to look up towards the sky and see the annular eclipse, which is when the moon passes in front of the sun leaving just a golden ring ...

Wed, 16 May 2012 09:51:50 -0700 See the Winners of the Earth & Sky Photo Contest Enjoy this delightful video put together by Babak Tafreshi from The World At Night showing the winners of the third International Earth and Sky Photo Contest. With the theme of 'Dark Skies Importance,' these are lovely landscape astrophotos, " in appreciation of the night sky beauty as an essential element of our nature, importance of [...]

Sun, 20 May 2012 13:06:12 -0700 U.S. could lose aging eyes in the sky About every two weeks, Rick Allen gets a series of thermal snapshots from high above Earth that show how water gets used across the western United States, a perennial source of friction in the largely arid region.

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