30周胎儿四维彩超徐州(徐州四维彩超几个月做的) (今日更新中)

The Geminid meteor shower peaks this week, so hope for clear skies that will let you see a beautiful show of green fireballs on Thursday and Friday. This will be the last -- and strongest -- meteor shower of the year, according to NASA.This phenomenon was first recorded in 1862 and causes a show each December.In the hours before sunrise Friday, the most meteors will be visible in the North American sky, peaking about 7:30 a.m. ET, predicts Sky & Telescope. To see when they will peak in your part of the world, check here.But the morning isn't your only chance. On Thursday and Friday, keep an eye on the sky a few hours after sunset -- just keep the moon at your back.Although the Geminid shower is known for its "shooting stars," the number of meteors visible depends on the time and how dark it is. There will be fewer of them earlier in the evening, but the shower should hit a maximum of about 100 per hour around 2 a.m., NASA said. For those in the suburbs, expect about 30 to 40 per hour. And if you're in a city like New York, San Francisco or Atlanta, you probably won't see anything.Early evening meteors may be longer, with dramatic streaks that last several seconds. Later on, the meteors will present quicker streaks or leave trails of smoke that appear to glow.The asteroid 3200 Phaethon is responsible for this meteor shower, which is unusual because comets usually create meteor showers with icy debris. Scientists have debated the very nature of what Phaethon is. The closely tracked near-Earth asteroid has been likened to comets, so it's been called a "rock comet."Phaethon was discovered in October 1983 and named after the Greek myth about the son of Helios, the sun god, because it closely approaches our sun.Phaethon orbits the sun closer than any other asteroid and takes 1.4 years to orbit it. The asteroid heats to about 1,300 degrees Fahrenheit on closest approach to the sun, which causes it to shed dusty debris.These particles cause the meteor shower when they plunge into Earth's atmosphere at 22 miles per second, vaporizing in the streaks we call "shooting stars."If you live in an urban area, you may want to drive to a place that isn't littered with city lights that will obstruct your view. If you're able to find an area unaffected by light pollution, meteors could be visible every couple of minutes from 10 p.m. until dawn.Find an open area with a wide view of the sky, and don't forget to bundle up. Make sure you have a chair or blanket so you can look straight up. And give your eyes about 20 to 30 minutes to adjust to the darkness -- without looking at your phone -- so meteors are easier to spot.While you're keeping an eye out for the meteor shower, you might see a small, foggy green patch in the sky, NASA said. That will be Comet 46P/Wirtanen, which is making its closest approach to Earth -- within 7 million miles -- for the next 20 years. And it will be visible to the naked eye. The comet is expected to come closest to Earth and peak Sunday. 3007

The Broward County Sheriff's deputy who was assigned to be the school resource officer at Stoneman Douglas High School during last week's massacre that left 17 dead resigned this morning after being suspended without pay, Sheriff Scott Israel announced on Thursday. Israel said that Deputy Scot Peterson was outside of the building during the time of the shooting. According to Israel, video evidence suggested that Peterson remained outside for four minutes. The entire mass shooting lasted an estimated six minutes, Israel said.Related story: Parkland shooter Nikolas Cruz recorded during 911 call in Palm Beach County 648

The FBI said on Tuesday that cybercriminals and foreign actors are attempting to influence the upcoming election.According to the FBI, “Foreign actors and cybercriminals could create new websites, change existing websites, and create or share corresponding social media content to spread false information in an attempt to discredit the electoral process and undermine confidence in U.S. democratic institutions.”Beyond attempts to influence the vote, the FBI says these actors are attempting to sow distrust in the electoral system. The FBI in particular warns that cybercriminals could take advantage of the likelihood several states will need additional time to count ballots due to increased mail-in voting and social distancing protocols. While a delay in results does not indicate any wrongdoing, the FBI warns that foreign actors could attempt to spread misinformation to cause distrust in the system while votes are being tallied.Last month, the Office of the Director of National Intelligence released a statement outlining efforts by Iran, China and Russia to attempt to undermine this year’s presidential election.“Ahead of the 2020 U.S. elections, foreign states will continue to use covert and overt influence measures in their attempts to sway U.S. voters’ preferences and perspectives, shift U.S. policies, increase discord in the United States, and undermine the American people’s confidence in our democratic process,” William Evanina, director of the United States National Counterintelligence and Security Center, said. "They may also seek to compromise our election infrastructure for a range of possible purposes, such as interfering with the voting process, stealing sensitive data, or calling into question the validity of the election results. However, it would be difficult for our adversaries to interfere with or manipulate voting results at scale.”As part of Evanina’s assessment, he said that China and Iran were attempting to seek a favorable outcome for Biden, while Russia was working to ensure a favorable outcome for Trump.“As Americans, we are all in this together; our elections should be our own,” Evanina previously said. “Foreign efforts to influence or interfere with our elections are a direct threat to the fabric of our democracy. Neutralizing these threats requires not just a whole-of-government approach, but a whole-of-nation effort.”The FBI offered the following recommendations to voters:Seek out information from trustworthy sources, such as state and local election officials; verify who produced the content; and consider their intent.Verify through multiple reliable sources any reports about problems in voting or election results, and consider searching for other reliable sources before sharing such information via social media or other avenues.For information about final election results, rely on state and local government election officials.Report potential election crimes—such as disinformation about the manner, time, or place of voting—to the FBI.If appropriate, make use of in-platform tools offered by social media companies for reporting suspicious posts that appear to be spreading false or inconsistent information about election-related problems or results. 3236

The former football coach for The Ohio State University, Earle Bruce, died early Friday morning, ESPN reports.Bruce was the coach for the Buckeyes from 1979 to 1987 and had the difficult task of replacing legendary Buckeyes coach Woody Hayes. He was well-regarded, leading the team to four Big Ten titles and had a 5-3 record in bowl games. A number of his players, such as Jim Lachey, Keith Byars and Pepper Johnson, went onto pro careers. 478

The chairwoman of the Republican National Committee, Ronna McDaniel, has tested positive for coronavirus, according to multiple reports.The New York Times reports McDaniel is experiencing mild symptoms and is quarantining in Michigan.She was last with President Donald Trump last Friday, and the NYT says she received her diagnosis on Wednesday. 353

来源：资阳报