内容摘要：“You can find these low-cost, indoor air quality monitors just about everywhere online now. They don’t cost all that much anymore,” he said.

“You can find these low-cost, indoor air quality monitors just about everywhere online now. They don’t cost all that much anymore,” he said.

Tennis is an all-day sport, especially at its, where ticket sales and TV contracts bring in millions and drive decision-making by organizers. The French Open, U.S. Open and Australian Open all have night sessions

; Wimbledon has an 11 p.m. curfew.So in Paris, for example, a match can start at 11 a.m. or 8:15 p.m. or anywhere in between — or, occasionally, much later. It is a frustrating aspect of the sport for the athletes or for fans hoping to see a certain player.has been a hot topic, with questions about why the first match every day in the main stadium — before most spectators have arrived, leaving thousands of empty seats — involves women, and why the popular night session exclusively has gone to men.

The primetime slot that hasn’t been offered to any women in Paris since one match in 2023 often means extra attention and exposure.It also can mean staying up past one’s bedtime.

“If I could never play at 1 a.m. ever again for the rest of my life, I would be so happy,” No. 7 seed Keys, a 30-year-old born in Illinois and based in Florida, said with a laugh. “You know when you’re going to go on. There’s no chaos. You go to bed at a totally normal time. I feel like I’ve lived my night-owl life, and I would really love to be that first-on slot for the rest of time.”

Other than the initial matches on each court in the morning and at night, it is impossible to know when to warm up and ramp up. Tennis isn’t a timed sport, so it’s anyone’s guess when, say, a day’s third or fourth match in a given arena will begin — and as the temperature and weather shifts across the hours, the clay at the French Open can shift, too.Scientists had long thought the Oort Cloud was shaped like a sphere or flattened shell, warped by the push and pull of other planets and the Milky Way itself. The planetarium show hinted that a more complex shape could lie inside.

The museum contacted the researcher who provided the Oort Cloud data for the show, who was also surprised to see the spiral.“It’s kind of a freak accident that it actually happened,” said David Nesvorny with the Southwest Research Institute.

Realizing they’d stumbled on something new, the researchersearlier this year in The Astrophysical Journal.