After the discovery of the seven earth sized planets scientists have made more progress about the Trappist-1. These planets are tightly packed around a dim star called the "Trappist-1." With further research scientists will be able to find out the possibility of another earth, it appears that the planets are so close that a year lasts less than two weeks.

The Trappist-1 makes these worlds a miniature analogue of our own Solar System, in the last two decades almost 3,500 planets have been found orbiting stars beyond the sun as per Space. The most exciting part is that all the seven discovered worlds completes and orbit between 1.5 to 13 days.

The planets are so tightly packed that if a person stands on one planet, he could see the other neighboring world in the sky even larger than our moon. The Trappist-1 is a dim star and thus the planets avoid getting baked. The reason for the short years on these planets is because they are closer to the star than any planet sits on the sun.

Known as the small ultra cool dwarf star the Trappist-1 has luminosity roughly around 1/1000th that of the sun. When the dwarf star was compared to the sun, researchers have stated that if the sun is the size of a basketball, the Trappist-1 is like a puny golf ball.  

The good news is that three of the planets receive similar amounts of radiation as Venus, Earth and Mars. The alternative Solar System surely appears to be like a compact version of our own, but the biggest question is if there could be another Earth like planet.

All the seven planets are Earth sized and this means there is a possibility for another Earth. However, there are other questions that rise as the research gets deeper, if the years are short then the climatic changes must also be different.

The other problem is that the Trappist-1 system's orbits are so close to the star that the planets are likely to tidal lock, which means they could permanently face the star. If this happens one side of the planets will have day forever and the other will have night.