Astronomers have discovered the first “exolua” | Superinteressante

Exolua – Destaque
Exolua specifications

(NASA/ESA/L. Hustak/run)

Giordano Bruno in 1584, and claimed that there are “countless Suns and countless the Earth” in the sky. At the time, was accused of heresy, but the discovery of the outer planets (those orbiting a star other than the sun) has shown that Monk was right. Now science has gone beyond that: scientists believe they have discovered the existence of “exolua”.

That’s right, the moon which is outside the solar system. Accordingly reported by astronomers at Columbia University in the scientific journal Science Advances , the exolua is the size of Neptune, making it also the largest moon is known, which exceeds the size of each of the solar system. Orbiting a planet outside the solar system, gases, cables 1625b, which is much larger than Jupiter (the largest planet in the solar system) and is 8000 light years away in the constellation Swan (Cygnus).

Astronomers David Kipping and Alex Teachey discover after the analysis of the movement of about 300 planets discovered by the space telescope Kepler. Haven’t looked properly, but only observed indirectly or through any shade of this design when they pass in front of stars, or when the effect of gravity generates a noticeable change in the path of the celestial bodies that revolve about the stars. By analyzing these clues, scientists can put the existence of planets outside the solar system. Finding the supposed “exolua” used the same product.

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Kipping and Teachey noticed anomalies in data traffic (the point at which a planet passes in front of its star) of the planet Kepler 1625b. “We’ve seen small deviations and oscillations in the light curve that caught our attention,” said Kipping.

This track, coming from the Kepler telescope, it was curious that the scientists decided to confirm this using data from a telescope with a resolution four times superior to the Hubble. With astronomers saw two short moments of thought that may be an indication of a “exolua” about one of the planets in transit. They also wanted to confirm with the Hubble possible gravitational influence of the moon on the planet outside of the solar system, such as changing the start time of the transit.

The researchers attest that the planet Kepler 1625b spent in front of the Star, about 80 minutes from the deadline. This observation suggested that the differences in transit time, which is an important indicator of the presence of exolua. In the words of Kipping, is “the moon that follows your planet like a dog on a leash following his owner”. All this was realized with data from 40 hours of note Hap.

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On exolua discover by about only 1.5% of the mass of the planet that accompanies it, which is close to the mass ratio between the Earth and the moon. On the basis of the distance between the exoastros temperature exolua at about 80 degrees Celsius. This temperature can even support life, but as Kepler 1625b and the moon is the invader (not to be a hard crust), scientists believe that this possibility is very unlikely.

Although the discovery of astronomers think they need more observations to confirm the presence of this moon outside the solar system. “The results of our research leaves us excited, but now we have to wait for a signal from the scientific community,” said Teachey.

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