The first exomoon: Evidence of a moon outside our solar system

The first exomoon: Evidence of a moon outside our solar system

The first exomoon: Evidence of a moon outside our solar system

For both Alex Teachey and David Kipping from the Columbia University, they indeed discovered the first moon outside our solar system, only that they don't have indisputable evidence to prove it.

This potential new moon orbits around a giant, Jupiter-sized planet some 8,000 light years from Earth.

NASA's Hubble and Kepler space telescopes have uncovered what could be the first moon outside our solar system ever found.

Astronomers David Kipping, from Columbia University in NY and Alex Teachey are reporting and publishing the results Science Advances journal observing all the hypothesis and anomalies, comparing the data they have other planets in the system or stellar activity but they still can not explain the new discovery.

In the Solar system known eight major planets and their satellites about 200. The moon of Jupiter Ganymede has a diameter of about 5 260 km is estimated, the detected aktolun has a diameter of about 49 000 km. Kepler-1625b was discovered on May 10 2016, and is as far from its star as Earth is from the sun, placing it in the habitable zone. This mass-ratio is similar to the one between Earth and the Moon. In order to find a suggestive signal of an exomoon, Kipping and Teachey was looking for a heavenly body to pass in front of the parent star's light and dip and a delay in the planet passing in front of its star.

The team behind this intriguing discovery, researched more than 250 planets outside our solar system using the space telescope NASA Kepler.

Kipping said "We saw little deviations and wobbles in the light curve that caught our attention". The researchers were awarded 40 hours of observation time using Hubble, and the data they gathered were four times more precise than what Kepler had captured.

Kepler 1625b was found to start its orbit over an hour early, a marker that something with generally solid gravity is pulling on it, substituting its focal point of gravity and influencing its orbit. "It tells a lot about how unique or how common, in fact, that our solar system is-that the setup of having planets with moons may be something quite common", says Andrew Fazekas, an astronomy columnist with National Geographic.

"Unfortunately, the scheduled Hubble observations ended before the complete transit of the moon could be measured".

Mr Teachey said he is "urging caution" in interpreting the findings, and that more observations are needed to confirm the existence of the exomoon - which would be named Kepler-1625b-i.

The size and gaseous composition of the exomoon challenge current moon formation theories. "But we knew our job was to keep a level head and essentially assume it was bogus, testing every conceivable way in which the data could be tricking us".

Hints of a moon orbiting the planet called Kepler-1625b were first detected previous year, but the pair used Hubble to analyse the region in greater detail.

Hubble also provided supporting evidence for the moon hypothesis by measuring that the planet began its transit 1.25 hours earlier than predicted.

But Dr Kipping said: "Both bodies, however, are considered to be gaseous and therefore unsuitable for life as we know it".

Discovered the Moon revolves around the exoplanet Kepler-1625b. Out of the eight planets, only Mercury and Venus have none.

They followed up with the Hubble Space Telescope. There's no analog for such a large moon in our own system.

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