Astronomers have discovered for the first time a moon outside our solar system. Exomonde are actually too small to be from earth to be detected. But the newly-discovered moon is huge – as big as Neptune.
Looks like the Gas moon of his planet Kepler 1625b?
Astronomers had managed so far never to make a moon outside our solar system – until now. The astronomers Alex Teachey and David Kipping of Columbia University in New York discovered with the help of the Hubble telescope, evidence of a moon around 8000 light-years away from us. You provide your measurements in the journal “Science Advances”.
Around 200 moons are cataloged in our solar system so far – outside of which there is not a single. Should confirm the observation, it would be the first documented moon outside our solar system.
More to the search for exoplanets: NASA’s space telescope, TESS should find Exo-planets
The shading reveals a Planet and moon
The two researchers had taken with the Hubble space telescope, the star Kepler-1625 in the constellation of the Swan to the visor. There, the US space Agency, NASA, had discovered previously with the help of the Kepler space telescope, the Kepler planet-1625b.
This Planet moves in its orbit, as seen from earth, regularly in front of its host star. In doing so, he foreshadows the star of something. This shading Kepler measures the light curve.
From the observations, the researchers knew that the Planet orbits about the same distance to its star as our earth around the sun. However, it is a gas planet, probably several times as much mass as Jupiter, the largest Planet in our solar system.
In the data, suspicious anomalies. “We have seen small deviations and fluctuations in the light curve, which made us aware of,” said Kipping. These anomalies, the two researchers studied the older Hubble space telescope then in a little more detail. And the researchers received a four times more accurate light curve as before.
Strange solar systems: Three suns for a planet
Two telescopes are better than one
The space telescopes Kepler and Hubble’s work according to different principles. Kepler uses to keep track of a photometer the brightness of 100,000 stars simultaneously and to identify exoplanets. Hubble, by contrast, is a classic mirror telescope, which is the electro-magnetic spectrum from infra-red covers to ultra-violet light, and an observed area of focus.
In the case of observations with Hubble to the Transit of the planet began approximately 78 minutes
earlier than expected. The deviation is explained by a moon or by another planet to explain. Another planet could not discover the astronomers yet, however.
In addition, the researchers noted, about 3.5 hours after the Transit of the planet a further shading of the star. It fits to the Transit of a moon, “runs the planet at the back like a dog on a leash to its owner,” such as Kipping describes it.
The Exomond would result in about 1.5 percent of the mass of the planet, which is similar to the relationship of our earth to your moon. Since the Planet is larger than Jupiter, would have been Neptune, his moon is in approximately the mass of the planet – and would also be out of Gas.
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