& çâÌæÚUæð´ ·¤è ¥ôÚU Îð¹Ùæ ÁæÚUè ÚU¹ð´ ¥ÍæüÌ ¥ÂÙð ÜÿØ ÂÚU ŠØæÙ ÚU¹ð´Ð ãæÚU Ù ×æÙð´, €UØô´ç·¤ ·¤æ× ·¤ÚUÙð âð ¥æÂ·¤ô ©gðàØ ·¤è Âýæç# ãôÌè ãñ ¥õÚU ÁèßÙ ·¤æ ¹æÜèÂÙ ÎêÚU ãôÌæ ãñÐ ÖÜð ãè ÁèßÙ ×ð´ ç·¤ÌÙè Öè ·¤çÆÙæ§ü €UØô´ Ù ¥æ°, çÁ™ææâæ ¥õÚU ©ˆâæã ÕÙæ° ÚU¹ð´Ð ŠØæÙ ÚU¹ð´, ÜÿØ ã×ðàææ ¥æÂ·Ô¤ Âæâ ãôÌð ãñ´ çÁ‹ãð´ ÂæÙð ·Ô¤ çÜ° ÂýØæâ ¥æÂ ·¤Öè Öè àæéM¤ ·¤ÚU â·¤Ìð ãñ´Ð

More planets may have life

BBC Online
New computer models suggest there could be many more habitable planets out there than previously thought.
Scientists have developed models to help them identify planets in
FROM PAGE 20 far-away solar systems that are capable of supporting life.
Estimates of habitable planet numbers have been based on the likelihood of them having surface water.
But a new model allows scientists to identify planets with underground water kept liquid by planetary heat.
The research was presented at the British Science Festival in Aberdeen.
Water is fundamental for life as we know it. Planets too close to their sun lose surface water to the atmosphere through evaporation.
Surface water on planets located in the more frigid distant reaches from their sun is locked away as ice.
The dogma was, for water to exist in its life-giving liquid form, a planet had to be the right distance from its sun—in the habitable zone.
As Sean McMahon, the PhD student from Aberdeen University who is carrying out the work explained: "It's the idea of a range of distances from a star within which the surface of an Earth-like planet is not too hot or too cold for watertobeliquid.
"So traditionally people have said that if a planet is in this Goldilocks zone — not too hot and not too cold — then it can have liquid water on its surface and be a habitable planet"
But researchers are starting
to think that the Goldilocks theory is far too simple.
Planets can receive two sources of heat -- heat direct from the star and heat generated deep inside the planet.
As you descend through the crust of the Earth, the temperature gets higher and higher. Even when the surface is frozen, water can exist belowground.
Immense quantities of water in fact - teeming with primitive life.
Prof John Parnell, also from Aberdeen University said: "There is a significant habitat for micro-organisms below the surface of the Earth, extending down several kilometres."
So the Aberdeen team are developing models to predict which far-flung planets might harbour underground reservoirs of liquid water with the possibility of alien life.
Explaining their rationale, McMahon said: "If you take into account the possibility of deep biospheres, then you have a problem reconciling that with the idea of a narrow habitable zone defined only by conditions at the surface."
Even a planet so far from tire star that it receives almost no solar heat could still main-tain underground liquid water.
According to Mr McMahon, "There will be several times more [habit-able| planets".