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Astrophysicist and author Neil deGrasse Tyson has denied allegations of sexual misconduct made against him by three women.Last month, three women told Patheos, a religion and spirituality website, that Tyson harassed them and made inappropriate sexual advances as early as 1984 and in recent years."Accusations can damage a reputation and a marriage. Sometimes irreversibly. I see myself as loving husband and as a public servant -- a scientist and educator who serves at the will of the public. I am grateful for the support I've received from those who continue to respect and value me and my work," he wrote in a lengthy Facebook post titled "On Being Accused."Tyson disputed or offered a different version of the allegations against him.Katelyn N. Allers, an associate professor of physics and astronomy at Bucknell University in Pennsylvania, told Patheos that Tyson grabbed her arm and reached into her dress while looking at her tattoo of the solar system. She said the incident happened during a party after a gathering of the American Astronomical Society in 2009. 1081

As the debate over voting by mail continues, President Donald Trump told a North Carolina news outlet that voters should test election safeguards by voting both in person and via mail, something which could cause voters legal issues.Trump has expressed doubt in mail-in voting during the 2020 election cycle, claiming that mail-in voting is prone to fraud. But many states, some of which are led by Republicans, are ramping up mail-in voting efforts. Proponents of mail-in voting say that it is a safer alternative than in-person voting given the coronavirus pandemic.The president, speaking to a reporter from WECT, said he wanted voters to test the state’s safeguards.“So let them send it in and let them go vote, and if their system’s as good as they say it is, then obviously they won’t be able to vote,” Trump told WECT. “If it isn’t tabulated, they’ll be able to vote. So that’s the way it is. And that’s what they should do.”In North Carolina, it is a Class I felony to vote twice. The National Conference of State Legislatures has a list of laws pertaining to “double voting” on its website. Voting twice in an election is illegal across the US.Meanwhile on Wednesday, US Attorney General William Barr said that voting by mail is “playing with fire.”“We're a very closely divided country here,” Barr told CNN’s Wolf Blitzer. “And if people have to have confidence in the results of the election and the legitimacy of the government and people trying to change the rules to this, to this methodology, which as a matter of logic is very open to fraud and coercion, is reckless and dangerous. And the people are playing with fire."While there is scant evidence of widespread voting fraud in past elections, there are questions on the US Postal Service’s ability to return ballots in time to be tabulated.In Florida, Volusia County Elections said more than 1,000 ballots that should have been counted for last month’s primary did not arrive on time. There were 1,281 ballots postmarked the day before Election Day, but election officials received them too late to be counted.The USPS has experienced some service disruptions as some sorting machines have been removed from some post offices. While this had an impact on last month’s primary, the USPS slowdown has also caused slowdowns for essential items such as medicines and paychecks. 2350

Authorities have identified a Facebook post believed to have been made by the gunman who killed 12 people at a bar in California, a law enforcement official said.Ian Long, 28, burst into the Borderline Bar & Grill in Thousand Oaks and opened fire with a Glock .45-caliber handgun as patrons line-danced late Wednesday night.Long is believed to have posted the social media message around the time of the attack, according to the official, who is familiar with the investigation.In it, the writer says: "I hope people call me insane ... (laughing emojis).. wouldn't that just be a big ball of irony? Yeah ... I'm insane, but the only thing you people do after these shootings is 'hopes and prayers'.. or 'keep you in my thoughts'... every time... and wonder why these keep happening. " 796

At 3 p.m. ET on Monday, November 26, a group of researchers will be really sweating. The NASA InSight spacecraft will try to land on Mars.After six months of flight, the lander component of the probe will detach itself from the cruise stage and head into the atmosphere. The lander component initially looks a fair bit like the re-entry capsule used in the 1960s and 1970s for the Apollo moon missions -- sort of conical, with a smooth and flat bottom. That bottom is a crucial heat shield that is designed to protect the probe as it passes through the thin Martian atmosphere.The landing is a devilishly difficult feat. The landing capsule has to batter its way through the atmosphere. It will fly through the Martian air at an initial speed of 12,300 mph, and it must hit the atmosphere at an angle of precisely 12 degrees. Any shallower, and the probe will bounce off into deep space. Any steeper, and the probe will burn itself up in a spectacular and fiery death. The probe will first touch the atmosphere six minutes and 45 seconds before landing. During this phase, it will experience acceleration 12 times that of the Earth's gravity. Were the probe a 150-pound human, during the flaming descent, it would weigh nearly a ton.About 3? minutes after the probe hits the atmosphere, a parachute will deploy, slowing down the probe even more. Fifteen seconds later, explosives will blow the heat shield off, exposing the actual InSight probe hidden inside. Ten seconds after the heat shield falls away, the probe will extend its legs, much like an airplane extends its wheels before touching down.The probe will fall for an additional two minutes attached to the parachute and protected by its conical shell. About 45 seconds before InSight lands, it will drop out of the shell and fall toward the surface. As soon as it leaves the shell, its landing rockets will ignite.The actual InSight probe looks a little bit like the Apollo moon lander, with three legs to support it and a boxy top. The rockets will slow it further and stop any remaining horizontal motion. Then, about 15 seconds before touchdown, the InSight probe will descend at a speed of 8 feet per second, before hopefully touching down gently on the Martian surface.The entire landing sequence will take about seven minutes to occur. A radio signal from Mars to Earth currently takes about eight minutes and seven seconds to get here. So the complete landing process will take place before we find out if it was successful. It will be done automatically, entirely by the probe itself. For the scientists and engineers who designed InSight, this is called "seven minutes of terror."And they are right to be worried. Mars is a graveyard of failed probes. There have been 44 attempts by various national space agencies to land on Mars. Eighteen have been successful. Twenty-three have not. Three have achieved orbit but failed at a landing.So, what does InSight hope to achieve? Well, as it happens, a lot. But it's different than the intrepid Curiosity probe, which NASA landed in 2012. InSight will not move around. Instead, it will stay put and tell us of the interior of Mars.One thing it will do is emit radio waves that we can monitor on Earth. By making careful measurements of how the frequency of the radio waves change, we will be able to measure the degree to which Mars wobbles as it rotates. That will tell us something about the core of the planet, specifically its makeup and information on the degree to which it is molten.InSight will also deploy a seismometer to listen for marsquakes (like earthquakes, but Martian-style) and for impacts of meteors on the planet. Information gleaned from the waves the seismometer detects will tell us more about the planet's interior.The third thing InSight will do is to dig below the planet's surface. Using a jackhammer, the probe will drill down 5 meters (16 feet) into the planet and, basically, it will take the planet's temperature.There are many reasons this is interesting. Taking the temperature at that depth will allow planetary scientists to determine how much heat is escaping from Mars. More broadly, this measurement will allow a clear determination of the temperature of the planet much closer to the core.This information will tell us a lot about how Mars formed, which, in turn, will add to the information of how rocky planets, including our own Earth, typically develop.And if you're more of an explorer kind of person and not so interested in Martian geology, it will also tell us how warm the planet is at modest depths, which will tell us if there is any chance of liquid water on the planet. Perhaps obviously, if the Martian subsurface is warm enough, any buried water will be in liquid form and not ice. Finding liquid water would be the key discovery that would make Martian exploration relatively easy. A relatively recent possible discovery of a buried Martian lake was promising, but the data was not conclusive. Knowing that the ground is warm would be very comforting to possible future explorers.Exploring the solar system is the first step toward exploring the stars. The InSight probe will give us --well -- insight into whether this is something that humanity will achieve in the foreseeable future.And maybe Elon Musk's bet on him getting to Mars will become true. 5329

ATLANTA - In a memo this week, Delta Airlines’ CEO told staff nearly 700 passengers have been placed on the no-fly list in 2020 for refusing to comply with policies requiring masks on planes.This is a sharp increase from the 460 banned passengers the airline reported in October. Delta and other airlines have been adding mask rule-breaking passengers to the no-fly list since early in the pandemic.Delta is not alone, latest numbers from United report about 430 passengers of that airline have been added to the no-fly list for not following their mask policy, and 88 have been banned from JetBlue flights.A Department of Defense study found that masks, combined with airplanes’ air filtration systems, can greatly reduce the risk of transmitting the coronavirus during a flight.While that sounds like a lot of passengers, Delta told Fox News they are flying about 1 million customers per week.In the message to staff Wednesday, Delta’s CEO Ed Bastian thanked employees for taking unpaid leave and manage reductions in hours earlier this year, which helped them be one of the few airlines that avoided involuntary furloughs. Ground workers and headquarters employees were cut to three or four days a week.However, he is now asking employees again to take unpaid leaves of absence to help the company save money, according to the staff memo. Bastian said Wednesday that Delta will need more employees to take unpaid leave “for the foreseeable future.”“I ask everyone to consider whether a voluntary leave makes sense for you and your family,” he said in a memo to employees.About 15,000 Delta employees have already left the airline through buyouts and early retirements, according to the Atlanta Journal Constitution.It's a sign of the deepening slump in air travel with coronavirus cases rising across the country. Delta expects to lose up to million a day on average during the fourth quarter.Delta is also one of the last airlines to block the middle seats on their planes, and says they will do so through March 2021.Unlike American and United, Atlanta-based Delta has avoided furloughs since the pandemic started by convincing thousands of workers to retire early or take unpaid leave.But the air travel recovery seems to be faltering. Passenger traffic rose over Thanksgiving week but has dropped since then. 2327

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