Hubble is the first major optical telescope to be placed in space and has an unobstructed view of the universe.
Scientists cannot go, visit other planets to find signs of life and can use this telescope to do so.
For a planet to be habitable, it needs to be in the habitable zone where water can exist in liquid form.
There is hydrogen as well as Helium, Nitrogen and Methane may exist, but it can't be detected with any instrument.
The objects are made by jets of ionized gases thrown out of a nreborn star, NASA said.
Kepler's findings have given a glimpse into roughly 200,000 potentially habitable world in Earth's sky.
The discovery of Wolf 503b offers a rare opportunity to study a planet unlike any in our system.
NASA fresh delays in the launch of a giant space telescope, which will now not be deployed before March 2021.
Astronomers believe that Nasa's upcoming James Webb space telescope could help us find out if any of the seven earth-sized planets around the Trappist-1 star 40 light years away could possibly support life.