It revolves around a gas giant and nearly does not differ from it in size.
The exoplanet was originally found by the transit technique, in which a planet passing in front of its host star, along our line of sight, causes the star's brightness to dim slightly (by around 1% for a Jupiter-sized planet orbiting a sun-sized star) once every orbit.
The more powerful and precise Hubble telescope detected a second and smaller decrease in starlight 3 1/2 hours after the planet passed in front of the star - "like a dog following its owner on a leash", as Kipping put it.
He says they've requested more time on Hubble to do follow-up observations next May, but they are still waiting on the results of that proposal.
In addition, as a planet and its moon orbit a common centre of gravity, it causes the planet to wobble away from its predicted location.
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.
But Kepler found no evidence for additional planets around the star during its four-year mission, said the researchers.
One of the authors behind the study - David Kipping from Columbia University in the U.S. - has been speculating about the possible existence of exomoons, and describing how they might be detected, for the last ten years. "It was definitely a shocking moment to see that Hubble light curve, my heart started beating a little faster as I kept looking at that signature". Or maybe its origin story resembles that of the moons of Jupiter, which are thought to have coalesced from a ring of gas and dust that circled the planet. This mass-ratio is similar to the one between Earth and the Moon. In this search, a moon would have been among the easiest to detect because of its large size.
We know there are some 200 moons in our own solar system, including Earth's aptly named "moon". But only one of them, Kepler 1625b, demonstrated the kind of properties that they were searching for-a couple of unforeseen variations from the norm. Of the eight planets, only mercury and Venus they are not. They also shift position with each orbit.
Both anomalies could indicate the presence of a moon in orbit around the planet.
"This would be the first case of detecting a moon outside our Solar System", Dr.
Astronomers used data and observations from the Kepler and Hubble space telescopes to study the distant star, planet and possible moon.
Manchester City ran away with the league last season , but it was Liverpool who handed them their first defeat of the season. Both sides are still unbeaten so far this term and sit joint at the top of the table with 19 points after seven games.
A large majority of Kenyans (70 per cent) have a favourable view of the United States , compared to a global median of 50 percent. General Assembly, an annual meeting of the world's top leaders and diplomats, exemplified numerous results of the survey.
The South Korean delegates will also tour major North Korean facilities and attend a performance of the North's iconic mass games. Pompeo is set to meet with North Korean leader Kim Jong-un in Pyongyang Sunday to discuss a second U.S.
He said the investigation was thorough, and for the witnesses interviewed "it's a cross between an endoscopy and a colonoscopy". Senator Kirsten Gillibrand and Senator Jeff Merkley both spoke on why Judge Brett Kavanaugh shouldn't be confirmed.
Senator Joe Donnelly is siding with the rest of his party in vowing to vote against the confirmation of U.S. Smyth, two people who Ford said were at the gathering of teenagers where Kavanaugh allegedly assaulted her.
More importantly, Shaw had the confidence of several hundreds under his belt when he walked out to bat for India Thursday morning. The teenage prodigy collected two fours off Bishoo in the 11th over and did the same to Chase in the 20th over.
Kavanaugh's fate boils down to at least three Republican senators: Jeff Flake, Susan Collins and Lisa Murkowski. Imitating her testimony, Mr Trump said: "What neighbourhood was it in?" I don't remember.
Diane Russell, a Democratic activist, said Collins voted to "betray ME women and ME survivors" by ignoring their stories. The nine-member Supreme Court decides matters that shape the country's politics.
Rahane, too, lacked the ease with which Shaw batted earlier in the day, and fell on 41 to Roston Chase in the last hour. I used to play 30-35 school games in a year, and played a lot of (first-class) Ranji (Trophy) cricket as well.
Theresa May must ditch her "outrageous" Chequers plan or the Tories will be "punished" by voters, Boris Johnson has warned. Scottish Secretary David Mundell said people were "concerned about Mr Johnson's behaviour".
Toddler Shreds $1K in Cash
They left the cash-filled envelope on the counter, so they wouldn't forget to take it to them this weekend, Jackee told CBS News. When the Utah Ticket Office heard of the incident, they were quick to offer Ben with a couple of free tickets to the game.
Looking ahead to Game(s) 163
Thanks to the Milwaukee Brewers winning their last seven games of the season, including a sweep over the St. Charlie Blackmon, who had two of Colorado's four hits Monday, called it "an awesome opportunity".
Police questioned Kavanaugh after bar fight in 1985
Mr Judge's interview started but "has not been completed", his attorney said in a statement quoted by Fox News. Harvard University's student paper has reported that Mr Kavanaugh will not return to teach law in January.
Turkey's Erdogan says United States has taken wrong path
Turkey's President Recep Tayyip Erdogan on Monday stressed his determination to eliminate terrorists from northern Iraq. Erdogan says Ozil was "ostracized" and that "as president, I could not stomach the fact that he was alienated".
Google Pixel 3 XL shown off in new video
A new insight has been surfaced over the web which noted much about the hidden secrets of Pixel 3 and 3 XL all together. Just like previous Pixel devices, supposed Pixel 3 XL units were displayed with only a single camera sensor on its rear.