Life on other planets

      According to the present experiments and knowledge life exists only on earth. But the question arises are we alone in this whole universe??? 

Our solar system

There may be billions of planets orbiting stars in the Milky Way, nebulae.  Not all planets have the condition similar to the earth means water, temperature etc. 

            Alien life, such as bacteria, has been hypothesized to exist in the Solar System and throughout the universe. This hypothesis relies on the vast size and consistent physical laws of the observable universe. According to this argument, made by scientists such as Carl Sagan and Stephen Hawking, it would be improbable for life not to exist somewhere other than Earth.


Possibilities of life :  

Experts examining results from the Kepler telescope have identified more than 1,200 planets in orbit around distant stars, 54 of which are a similar size to Earth and in habitable zones from their suns. Means life may be exists on that. The number is of within the telescope view range stars, there might be billions of planets or their moons which has the same condition as the earth.

depicts 55 Cancri e as it orbits its star. The planet whips around the star closely and quickly: It is 25 times closer to the star than      Mercury is to our sun and completes one orbit -- its year -- in a mere 18 hours.  (NASA)

NASA's Spitzer Space Telescope has detected light emanating from a "super-Earth" planet beyond our solar system for the first time. While the planet is not habitable, the detection is a historic step toward the eventual search for signs of life on other planets.

"Spitzer has amazed us yet again," said Bill Danchi, Spitzer program scientist at NASA Headquarters in Washington. "The spacecraft is pioneering the study of atmospheres of distant planets and paving the way for NASA's upcoming James Webb Space Telescope to apply a similar technique on potentially habitable planets."




to be continue...