The prime minister said he was "cautiously optimistic" of getting a Brexit deal, but the United Kingdom would leave by the deadline "whatever happens".
SNP MP Joanna Cherry QC and barrister Jolyon Maugham QC said they issued proceedings at Scotland's highest court, the Inner House of the Court of Session, on Thursday.
It also follows the passing of legislation, brought by Labour MP Hillary Benn, that makes it illegal for the United Kingdom government from pursuing a so called hard Brexit.
Mr Johnson insists he prorogued Parliament to set out his domestic agenda, and not to push through a no-deal Brexit unchallenged, as some MPs had suggested.
This power, known as a nobile officium, would allow the court to sign a letter requesting an extension to Article 50 if Mr Johnson refused to do so.
With the PM saying he would rather be "dead in a ditch" than ask Brussels for a delay to Brexit past the Halloween deadline, there have been fears Mr Johnson may refuse to do so.
Mid-October is when Johnson would have to come to Brussels for a summit of European Union leaders with either a new withdrawal agreement or a request for a delay to Brexit, but the British leader insists he would rather be "dead in a ditch" than postpone the October 31 withdrawal.
"To impose such other conditions and penalties (including fine and imprisonment, where consistent with the European Union ) Withdrawal) (No 2) Act 2019 as to the court shall in the all circumstances seem proper and appropriate in the event of the order not being implemented".
Virat Kohli hints MS Dhoni retirement today?
But it ended up creating a virtual buzz around whether Dhoni had informed the Indian skipper about his future plans. The rumour gained value after India captain Virat Kohli's tweet on his predecessor.
"The rule of law is not a thing to be grifted - not even by the Prime Minister", he said.
Mr O'Neill told the court that his clients wanted to give Mr Johnson seven days to lodge answers to their petition.
The government plans to appeal against it, and a full hearing is scheduled at the Supreme Court on September 17.
The Prime Minister responded, "I'm very happy to get back to Parliament very soon".
The Prime Minister did not react as one man was heard telling him: "Find a deal here - this is Doncaster, not Europe".
Parliament was prorogued, or suspended, on Monday until Oct 14, a move Johnson's opponents said was created to thwart their attempts to scrutinise his plans for leaving the European Union and to allow him to push through Brexit on Oct 31, with or without an exit deal to smooth the way. Such action is unlawful and wrongful.
Astronomers have detected water vapour in the atmosphere of another planet in a habitable zone for the first time. A NASA tally now lists more than 4,000 confirmed exoplanets and another 4,000 potential candidates.
Sur cette ligne seront fermées toutes les stations entre Saint-Philippe du Roule et Rue des Boulets (NB: Franklin D. Attention: c'est une journée très pénible qui s'annonce dans les transports en commun ce vendredi à Paris.
GM also is recalling over 177,000 Chevrolet Malibu sedans from the 2018 model year in the USA because the fuel injectors can fail. The recall comes after the National Highway Traffic Safety Administration began investigating in November of past year .
But a Juul spokesman said in a statement that the company "strongly" agreed with the need for "aggressive action" on flavors . The restrictions announced by Trump officials would only apply to nicotine vaping products, which are regulated by the FDA.
In 1987, he received a best rock vocal Grammy nomination for " Take Me Home Tonight ", which featured a cameo from Ronnie Spector. His death comes only one month after he announced that he had been diagnosed with stage 4 esophageal cancer .
The researchers said they clearly saw the signature for water vapor in the atmosphere when they put the data through algorithms. Scientists have made the first successful detection of an atmosphere with water vapour around the exoplanet K2-18 b.
Arrivé en fanfare cet été, Eden Hazard (28 ans) n'a participé à aucune rencontre officielle avec son nouveau club. Il ne faut pas parler, il faut juste agir sur le terrain, on a des matches pour le faire et on va s'y atteler.
The duchess said the project would see an item from the range donated to the charity Smart Works for each one bought by a shopper. The Duke and Duchess of Sussex will soon be boarding on their first official royal tour as a family along with their son Archie .
Son épouse est condamnée à trois ans de prison , mais sans mandat de dépôt , elle ne dormira donc pas en cellule ce soir. Isabelle et Patrick Balkany ont été reconnus coupables de fraude fiscale par le tribunal ce vendredi 13 septembre.
Interstellar Object May Have Entered Our Solar System
Hainaut told Business Insider , "Here we have something that was born around another star and travelling toward us. Although many astronomers are excited about C/2019 Q4, more work has to be done to confirm it as interstellar.
Rory McIlroy voted PGA's player of the year
McIlroy meanwhile admitted he had been somewhat surprised to pip PGA Championship victor and world number one Koepka to the award. He said at the start of the year at Kapalua, which he had not previously played, that his emphasis would be in America.
Archer removes Warner as England strike back in fifth Test
It was angling in on off-stump and nibbling away just enough to second slip, where Ben Stokes took a good low catch. The batsman pushed unnecessarily at a wide one and Steve Smith held on to complete a juggling catch at second slip.
Singer Adele files for divorce from Simon Konecki
Adele didn't confirm her marriage to Konecki until 2017, but the pair apparently has a secret ceremony years ago. With Adele's divorce filing, not only is custody of their son to be determined, but also their finances .