American millionaire Jonathan Lehrer denied bail after being charged with killing Canadian couple
American millionaire Jonathan Lehrer, one of two men charged in the killings of a Canadian couple in Dominica, has been denied bail.
It is a world wrapped in mystery - the seventh planet from the sun, Uranus, seen up close just once nearly four decades ago by a passing NASA probe and still warily guarding its secrets.
But new observations from a telescope located in New Mexico are providing a fuller understanding of its atmosphere, including the detection of a polar cyclone whose centre measures a quarter of Earth's diameter, swirling near its north pole.
Scientists were able to gaze more deeply into the atmosphere of Uranus - a planet classified as an ice giant, like its planetary neighbour Neptune - than ever before. The findings painted a picture of a planet more dynamic than previously known.
"While the general makeup of its atmosphere and interior are similar to Neptune - as far as we know - Uranus has some pretty unique features," said planetary scientist Alex Akins of NASA's Jet Propulsion Laboratory in California, lead author of the research published in the journal Geophysical Research Letters.
"It spins on its side. And even then, its magnetic field is still misaligned with its rotational axis. The atmospheric circulation and internal heat release appear weaker than Neptune, but there are still a range of dynamical features and storms that have been observed," Akins added.
Uranus, blue-green in colour due to the methane contained in an atmosphere comprised mostly of hydrogen and helium, is the third-largest planet in our solar system. It has a diameter of about 31,500 miles (50,700 km) and is big enough to fit 63 Earths inside it. Uranus orbits the sun at a distance of about 1.8 billion miles (2.9 billion km), almost 20 times further than Earth does. One orbit lasts 84 years.
Its unusual tilt makes Uranus appear to orbit the sun like a rolling ball.
The researchers used the Very Large Array telescope in New Mexico to see below the clouds at the top of the atmosphere, finding circulating air at the North Pole that was warmer and drier, evidence of a strong cyclone. They were able to estimate the size of the storm's centre but not the entire cyclone's diameter, though it potentially could be wider than Earth.
The research confirmed that polar cyclones are present on every body in our solar system with a substantial atmosphere - all the planets but Mercury and even Saturn's moon Titan.
"Polar cyclones are regions of high winds moving in a direction determined by the planet's rotation - clockwise on Venus, Uranus and anti-clockwise for the rest - with differing air properties between the inside and out," Akins said.
"The way they form is different from planet to planet," Akins added. "On Earth, their strength is modulated by season due to the amount of sunlight. We aren't quite sure yet how they form on Uranus. It's different from other cyclones in the sense that it's generally longer-lived and most likely forms from a different balance of atmospheric processes, and therefore is a more characteristic (enduring) feature of the atmosphere. That is unlike hurricanes, which form, move and dissipate on relatively short time scales."
Most of the mass of Uranus is a dense fluid of icy materials - water, methane and ammonia. Uranus is surrounded by two sets of faint rings and orbited by 27 small moons. Its atmosphere is the coldest of any of the eight planets, including outermost Neptune.
Its only close encounter with a spacecraft came when Voyager 2 flew by in 1986.
"There are a lot of unknowns," Akins said. "How did it get tilted on its side? Is its interior really 'icier' than the gas giants (Jupiter and Saturn)? Why do we see atmospheric banding features that aren't aligned with the measured wind speeds? Why is the pole so much drier than the equator? Are its satellites (moons) ocean worlds?"
(Reporting by Will Dunham, Editing by Rosalba O'Brien)
American millionaire Jonathan Lehrer, one of two men charged in the killings of a Canadian couple in Dominica, has been denied bail.
Cabinet minister Dominic LeBlanc says he plans to run in the next election as a candidate under Prime Minister Justin Trudeau's leadership, amid questions about his rumoured interest in succeeding his longtime friend for the top job.
A male columnist has apologized for a cringeworthy moment during former University of Iowa superstar and college basketball’s highest scorer Caitlin Clark’s first news conference as an Indiana Fever player.
The United States has vetoed a widely backed UN resolution that would have paved the way for full United Nations membership for the state of Palestine.
A group of suspects that allegedly defrauded seniors across Ontario and other parts of Canada using a so-called emergency grandparent scam appear to have ties to 'Italian traditional organized crime,' according to an investigator involved in the OPP-led probe.
Health Canada will change its longstanding policy restricting gay and bisexual men from donating to sperm banks in Canada, CTV News has learned. The federal health agency has adopted a revised directive removing the ban on gay, bisexual and other men who have sex with men, effective May 8.
Prince Harry, the son of King Charles III and fifth in line to the British throne, has formally confirmed he is now a U.S. resident.
Kevin the cat has been reunited with his family after enduring a harrowing three-day ordeal while lost at Toronto Pearson International Airport earlier this week.
Technology from the 19th century has been brought out of retirement at a Newfoundland gardening store, as staff look for all the help they can get to fill orders during a busy season.
Kevin the cat has been reunited with his family after enduring a harrowing three-day ordeal while lost at Toronto Pearson International Airport earlier this week.
Molly Knight, a grade four student in Nova Scotia, noticed her school library did not have many books on female athletes, so she started her own book drive in hopes of changing that.
Almost 7,000 bars of pure gold were stolen from Pearson International Airport exactly one year ago during an elaborate heist, but so far only a tiny fraction of that stolen loot has been found.
When Les Robertson was walking home from the gym in North Vancouver's Lower Lonsdale neighbourhood three weeks ago, he did a double take. Standing near a burrow it had dug in a vacant lot near East 1st Street and St. Georges Avenue was a yellow-bellied marmot.
A moulting seal who was relocated after drawing daily crowds of onlookers in Greater Victoria has made a surprise return, after what officials described as an 'astonishing' six-day journey.
Just steps from Parliament Hill is a barber shop that for the last 100 years has catered to everyone from prime ministers to tourists.
A high score on a Foo Fighters pinball machine has Edmonton player Dave Formenti on a high.
A compound used to treat sour gas that's been linked to fertility issues in cattle has been found throughout groundwater in the Prairies, according to a new study.
While many people choose to keep their medical appointments private, four longtime friends decided to undergo vasectomies as a group in B.C.'s Lower Mainland.