Two more planets were discovered near the solar system by the same group of international scientists.
And there is a possibility that there is another third planet close to these two planets.
Both planets are in close orbit - a small star called GJ887 outside its habitat - 11 years away from sunlight.
The proximity between the two planets and the stars is greater than the proximity between Mercury and the sun.
The two planets whose existence had been confirmed were described as the 'big world'.
They are 4 to 7 times larger than Earth, but similar to Uranus and Neptune.
"These are also said to have a solid foundation," Sandra Jeffers of the University of Göttingen and the lead of the study told the BBC.
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These planets are believed to have a heavier environment compared to our planet.
The study was carried out by the Red Dots project and was designed by various universities around the world to find planets that resemble the earth and are closer to the solar system, and the results are published in a scientific journal.
What is known about these two adjacent worlds?
'High Capacity Cameras'
Designated GJ 887b and GJ 887c, both planets were discovered using a high-resolution European Southern Observatory (ESO) spacecraft located in La Silla, Chile.
IMAGE SOURCE, ESO / M. KORNMESSER
Photo title,
Planets cycle faster and shorter on Earth compared to Mercury which takes 88 days to complete one cycle.
According to observations, the two planets are located near their stars.
GJ 887c, the furthest from the star, takes about 21.8 days of the earth's orbit to form an orbit 9.9 It takes about 9.3 days for GJ 887b to complete an orbit in the sun.
These cycles are faster and shorter than planet Mercury, which takes 88 days to complete one cycle in the sun.
Astronomers have discovered other planets located near the solar system, such as Proxima Centauri and Wolf 359, which are located 4.2 and 7.9 light-years away. But they're not as close as the GJ887.
So the GJ887 planet is the closest. But GJ887 is the closest, according to the Andalusian Institute of Aerospace Physics (IAA-CSIC).
"These planetary systems are common in other stars - between 15 and 30 percent of a solar-type star - but we've never seen one that is so close to the sun," said Guillem Anglada-Escudé of the ICE Institute. -CSIC) from the University of Barcelona and one of the founders of the study.
'Best star'
The two planets are located near their habitat near the stars.
This is the area where the planets of a particular system can have an environment that allows life.
