济南看哪个泌尿科医院好-【济南附一医院】,济南附一医院,济南睾丸下边的皮干裂咋回事,济南尿道感染怎么治疗,济南尿道炎要如何治疗,济南阴茎勃起疼痛怎么办,济南阴虱是多长时间,济南男人早泄射精无力怎么治

SAN DIEGO (KGTV) — On Monday, a planetary sight unseen for nearly 800 years will captivate stargazers as Jupiter and Saturn create a celestial event known as the "Christmas Star."The two bright planets will align to create an even brighter display, culminating on the night of Monday, Dec. 21, according to NASA. While the two planets pass each other regularly, this year's event is so rare because not only is the distance between the planets so close but it's also occurring at night."You can imagine the solar system to be a racetrack, with each of the planets as a runner in their own lane and the Earth toward the center of the stadium," said Henry Throop, astronomer in the Planetary Science Division at NASA Headquarters in Washington. "From our vantage point, we’ll be able to be to see Jupiter on the inside lane, approaching Saturn all month and finally overtaking it on December 21."The closest alignment will last for a few days and appear just a tenth of a degree apart. On Monday, Jupiter and Saturn will appear so close that a pinkie finger at arm’s length will easily cover both planets.The planets haven't passed this closely in 400 years, and it's been nearly 800 years since this "Great Conjunction" has occurred at night, NASA says."Conjunctions like this could happen on any day of the year, depending on where the planets are in their orbits," said Throop. "The date of the conjunction is determined by the positions of Jupiter, Saturn, and the Earth in their paths around the Sun, while the date of the solstice is determined by the tilt of Earth’s axis. The solstice is the longest night of the year, so this rare coincidence will give people a great chance to go outside and see the solar system."HOW TO SEE ITIn San Diego County, viewers can see the planets without needing a telescope by looking toward the southwest horizon just after sunset, NASA says, but a pair of binoculars or a small telescope will only enhance the view. The best way to see the phenomenon is by finding an unobstructed view of the sky from say a park or field. The sight should even be viewable from most cities, but the site will only be visible after sunset for about one to two hours.To tell the two planets apart prior to Monday when they switch positions in the sky, Jupiter will look like a bright star and be easily seen, while Saturn will look slightly fainter and slightly above and to the left of Jupiter.For photographers, NASA recommends using a long exposure time to take in enough light as it gets dark. Both cell phone camera and DSLR camera users are encouraged to use a tripod to reduce any shaking during a long exposure.Cell phone users may even want to use "night mode" or a wide-angle lens if available. DSLR users may consider setting their focus to manual and leaving their aperture wide open to let in as much light as possible.Jupiter and Saturn should be bright enough to allow photographers to capture the planets without needing to zoom, NASA says. More of NASA's photography tips can be found online here. 3044
SAN DIEGO (KGTV) — Nearly three-quarters of the students in San Diego County are currently learning from home, and those numbers don’t make a lot of sense to MIT professor Martin Bazant.Bazant is one of the creators of the COVID-19 Indoor Safety Guideline. The free online tool simulates the fluid dynamics of respiratory droplets in various kinds of rooms to show users the risk of different indoor environments.“If you run the numbers for a typical classroom, especially if the students and the teachers are wearing masks, then the amount of time in the room can be very significant,” Bazant said. “Essentially those people could spend a week in the classroom and not have a problem.”Bazant says the six-foot rule that has largely determined which businesses can stay open is overly simplistic. In some cases, he says the rule creates a false sense of security. In other situations, he says it causes the closure of businesses or schools that could safely operate.“If you place nursing home beds six feet apart in a shared room, they are absolutely not safe,” he said. But he said well-ventilated classrooms, with teachers and students in masks, are another story.“It's only the United States where we follow the six-foot rule. That's given by the CDC. The World Health Organization all along has been saying one meter, which is about three feet. If you simply followed the one-meter rule, all our schools would be open, as they are in most of the world right now,” he said.Bazant and his colleague John Bush said they set out to design a tool that would reveal the risk of transmission based on science, not guesswork.Users start by selecting a room type, like a classroom or an airplane. From there, they can control a wide array of variables to dial in the risk, like the room size, the ceiling height, and the ventilation and filtration systems.From there, users can further tune the model by human behavior. How many people are in the room? Are they whispering, shouting or singing? How many are wearing masks?Mask usage is a critical component, Bazant says. The model quickly reveals the challenges of maskless activities in rooms with poor ventilation. Put five people without masks in a 400 square foot room with closed windows, and it becomes unsafe after 33 minutes.Bazant says studies on super spreader events show in indoor environments, the distance from an infected person doesn’t matter. Infected droplets spread and mix throughout the room like second-hand smoke from a cigarette.But with masks trapping droplets and diverting them upwards like a chimney, an environment like an airplane could be safe for several hours, according to the model. With more than 95% of the passengers and crew wearing surgical masks, a Boeing 737 could support 200 people -- around full capacity depending on the configuration -- for 18 hours. 2850

SAN DIEGO (KGTV) -- Police have identified the man suspected of stabbing a 55-year-old to death in the Midway District Thanksgiving Day. According to San Diego Police, Forrest Robert Brantley, 38, stabbed 55-year-old Robert Frank Erbe around 8 a.m. November 28 on the 3100 block of Sports Arena Boulevard. Erbe was taken to the hospital but died from his injuries.RELATED: Police identify man killed in Midway District stabbingAfter investigating the stabbing, police learned that Brantley and Erbe got into some sort of fight before Brantley is accused of stabbing Erbe in the neck. Brantley was last seen walking away from the scene. He is considered armed and dangerous and should not be approached, police say. RELATED: Man stabbed to death in Midway District shopping centerAuthorities believe Brantley is in either San Diego County or Ventura County. He is wanted for the murder investigation as well as for a parole violation. Anyone who spots him is asked to call 911. Those with information are asked to call San Diego Police at 619-531-2293 or Crime Stoppers at 888-580-8477. 1094
SAN DIEGO (KGTV) — One person is dead after a shooting in the Mountain View area Wednesday.San Diego Police responded to reports of a shooting just before 3 p.m. in the 3500 block of Florence Lane. Officers arrived to find a victim in an alley suffering from a gunshot wound, according to City News Service.The victim, described only as a male, was pronounced dead at the scene.The suspected shooter was described as a man who appeared in his 30s, wearing shots and a black tank top. He seen fleeing the area with another person in a silver Dodge Ram pickup or similar truck, CNS reported.SDPD is investigating. The department advised people to avoid the area of 800 35th Street and 3400 Florence Street. 10News is monitoring this breaking news. 753
SAN DIEGO (KGTV) — Parks and libraries in city limits of San Diego are back open as of Saturday, Oct. 3 after more than six months of closures and caution tape.To begin, 12 city libraries first opened for in-person services, then more will gradually open. The first library locations to resume in-person services include Central, Carmel Valley, Point Loma, Mission Valley, Rancho Bernardo, Malcolm X/Valencia Park, Mira Mesa, Logan Heights, San Ysidro, La Jolla, Mission Hills-Hillcrest, and College-Rolando.The libraries will open at 25% capacity starting Saturday from 9:30 a.m. to 5:30 p.m. Monday through Saturday. The facilities will close for cleaning from 1 p.m. to 2 p.m. daily and frequently touched areas will be cleaned hourly and after each usage. Everyone will be required to wear face coverings, have their temperature taken, and practice physical distancing when possible.RELATED: Some San Diego city libraries to resume in-person servicesCity of San Diego to reopen all of its playgrounds after state guidance issuedPeople will not be able to browse for books, rather they will tell a librarian what they are looking for and the librarian will retrieve it. Computers are available at 12 locations and 10 of the locations will also have outdoor computer options.While families can continue to exercise their minds as libraries return, they can also now exercise their bodies.All 289 playgrounds in the city of San Diego are back open. There are also changes at playgrounds, including required face masks for everyone two years of age or older, advice to not use the playground when different households are unable to maintain a physical distance of 6 feet or when the capacity limit has been reached, no eating or drinking in playground, to ensure face masks are worn at all times, and advice to limit visit to 30 min per day when others are present. 1873
来源:资阳报