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APOD - SS 433: Binary Star Micro-Quasar

Astronomy Picture of the Day

Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

2020 August 31

https://www.youtube.com/embed/ld-bG1CjkZY?rel=0

SS 433: Binary Star Micro-Quasar
Animation Credit: DESY, Science Communication Lab

Explanation: SS 433 is one of the most exotic star systems known. Its unremarkable name stems from its inclusion in a catalog of Milky Way stars which emit radiation characteristic of atomic hydrogen. Its remarkable behavior stems from a compact object, a black hole or neutron star, which has produced an accretion disk with jets. Because the disk and jets from SS 433 resemble those surrounding supermassive black holes in the centers of distant galaxies, SS 433 is considered a micro-quasar. As illustrated in the animated featured video based on observational data, a massive, hot, normal star is locked in orbit with the compact object. As the video starts, material is shown being gravitationally ripped from the normal star and falling onto an accretion disk. The central star also blasts out jets of ionized gas in opposite directions – each at about 1/4 the speed of light. The video then pans out to show a top view of the precessing jets producing an expanding spiral. From even greater distances, the dissipating jets are then visualized near the heart of supernova remnant W50. Two years ago, SS 433 was unexpectedly found by the HAWC detector array in Mexico to emit unusually high energy (TeV-range) gamma-rays. Surprises continue, as a recent analysis of archival data taken by NASA's Fermi satellite find a gamma-ray source -- separated from the central stars as shown -- that pulses in gamma-rays with a period of 162 days – the same as SS 433's jet precession period – for reasons yet unknown.

Teachers & Students: Ideas for utilizing APOD in the classroom.
Tomorrow's picture: salted asteroid

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Older White Voters Up For Grabs; The Illness Affecting Young Athletes; The March On Washington

Plus, is it safe to get on a bus or subway?

by Jill Hudson and Suzette Lohmeyer Tyrone Turner/WAMU Stories and podcasts you may have missed...  Thousands of demonstrators descended on the nation's capital on Friday to demand an overhaul to the nation's criminal justice system and push for racial equality at the same site the Rev. Martin Luther King Jr. called for those same reforms decades ago in his iconic "I Have A Dream" speech. See photos from Friday's march and watch a video of stories from people who attended the 1963 march.  A person with a high viral load walks into a bar. That, according to researchers who study the novel coronavirus, is a recipe for a superspreading event. Just what makes this particular virus so … superspready? Inquiring minds also want to know: Is it safe to get on a bus or subway?  It has been three weeks since a massive explosion in Beirut's port. Thousands of volunteers from all over Lebanon have showed up in the city to help clear rubble and offer accommodation to hundreds of thousands who have lost their homes.  Young athletes — especially teen girls — can struggle with a breathing problem that is misdiagnosed as asthma. The real cause of the problem is in the vocal cords. The recent shooting of Jacob Blake in Kenosha, Wis., has brought discussions about the racial and economic divide in this growing bedroom community to the forefront. The world is also debating how to talk about Kyle Rittenhouse, the Illinois teenager who has been charged with the shooting deaths of two people — and the wounding of a third — as they protested for racial justice after the shooting of Jacob Blake.  Newsletter continues after sponsor message Listen Up! Courtesy of Ayim Darkeh Ayim Darkeh, an emergency room doctor in New York City, spoke with his mother, Shirley, in June about his experiences with racism, dating back to childhood. Listen to the StoryCorps episode or read about it here.  Plus listen to Life Kit's tips on how to be "anti-racist."  How was the the richest and most powerful country in the world laid low by a virus only nanometers in size? Ed Yong, a science reporter for The Atlantic, says it's the inequities that have been with us for generations that made our body politic such opportunistic targets. Listen to this episode of Code Switch here or read interview highlights.  Older white voters — a demographic that played a big role in electing Donald Trump four years ago — may be up for grabs in this year’s election. Many say they are unhappy with his general behavior and how he’s handled the pandemic, but others intend to stick with him. Click here to listen or read the story.  Our Picture Show Pick Hannah Reyes Morales for NPR At 12 years old, Joan Garcia liked leaping into the sea and racing the boys to the nearest pylon. She liked playing tag. When she started having sex at 13, she thought it was just another game. Over a 10-year period, 1.2 million Filipina girls between the ages of 10 and 19 have had a child. That's a rate of 24 babies per hour. And the pandemic has only made the situation worse.  Earth, Wind And Fire  Stocktrek Images/Getty Images Water is everywhere on Earth — the clouds, the rain, the oceans and rivers, even our own bodies. Where all that water originally came from is a bit of a mystery. NPR's Nell Greenfieldboyce reports that scientists may have found the answer inside some rare meteorites. Take a listen or read about it here. We've already seen smoke from the fires in California reach all the way to Minnesota. And with all that smoke comes possible risks to human health. Listen to Short Wave explain what smoke is made of, how it behaves in the atmosphere and what is its role in climate change.  The upshot of climate change is that everyone alive is destined to experience unprecedented disasters — the most powerful hurricanes, the most intense wildfires, the most prolonged heat waves and the most frequent outbreaks of new diseases are all in our future. Listen here or read the story.  The Culture Club  Stocktrek Images/Getty Images A new documentary, Class Action Park, is the story of an infamous New Jersey waterslide park that opened in 1978, enjoyed great popularity in the 1980s and is now remembered in part for the injuries and deaths that gave it its nickname. Not surprisingly, it was very popular with teenagers. It was run by kids, too, and they had a really good time. Mostly, the film is about the people who remember Action Park and want you to know it wasn't all bad. Actor Chadwick Boseman, who starred in Black Panther, has died at the age of 43. A statement posted on Boseman's Twitter account on Friday said the actor had battled colon cancer for the past four years.  Billie Eilish played NPR’s Tiny Desk at what looks like the actual Tiny Desk! How did she do it?  Correction: An earlier version of the Best Of NPR email incorrectly stated that Jacob Blake had died. He has not. Blake remains hospitalized after being paralyzed from the waist down.  What do you think of today's email? We'd love to hear your thoughts, questions and feedback: bestofnpr@npr.org Enjoying this newsletter? Forward to a friend! They can sign up here. Looking for more great content? Check out all of our newsletter offerings — including Daily News, Politics, Health and more! You received this message because you're subscribed to Best of NPR emails. This email was sent by National Public Radio, Inc., 1111 North Capitol Street NE, Washington, DC 20002 Unsubscribe  |  Privacy Policy

APOD - NGC 6357: Cathedral to Massive Stars

Astronomy Picture of the Day

Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

2020 August 30

NGC 6357: Cathedral to Massive Stars
Image Credit: NASA, ESA and Jesús Maíz Apellániz (IAA, Spain); Acknowledgement: Davide De Martin (ESA/Hubble)

Explanation: How massive can a normal star be? Estimates made from distance, brightness and standard solar models had given one star in the open cluster Pismis 24 over 200 times the mass of our Sun, making it one of the most massive stars known. This star is the brightest object located just above the gas front in the featured image. Close inspection of images taken with the Hubble Space Telescope, however, have shown that Pismis 24-1 derives its brilliant luminosity not from a single star but from three at least. Component stars would still remain near 100 solar masses, making them among the more massive stars currently on record. Toward the bottom of the image, stars are still forming in the associated emission nebula NGC 6357. Appearing perhaps like a Gothic cathedral, energetic stars near the center appear to be breaking out and illuminating a spectacular cocoon.

Teachers & Students: Ideas for Utilizing APOD in the Classroom
Tomorrow's picture: micro-quasar imagined

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Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
NASA Official: Phillip Newman Specific rights apply.
NASA Web Privacy Policy and Important Notices
A service of: ASD at NASA / GSFC
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When Wheezing Feels Like Asthma But Isn't

Tracking Coronavirus Cases In Schools

Shots National Jewish Health  A Young Athlete's Breathing Problems Weren't Asthma. What Were They? Young athletes — especially girls — can struggle with breathing problems that appear to be asthma but have a very different origin and call for different treatments. Telling them apart can be a puzzle.  For Reese Tempest, the wheezing started when she was in sixth grade, training with her track team. "I gutted it out and cried all the time. One race, I even passed out," Reese recalls. Several medical appointments and wrong diagnoses later, she found out what the trouble was: She had an unusual condition called exercise-induced laryngeal obstruction, or EILO. The troubles originate in the vocal cords, not the lungs. Read more about how to tell this condition apart from asthma, and how to treat it. +BONUS: Do steroid inhalers really work to prevent an asthma attack? Newsletter continues after sponsor message US schools tracker/Screenshot by NPR  There Have Already Been Over 4,000 Coronavirus Cases In Schools Looking for a snapshot of coronavirus outbreaks in U.S. schools? The National Education Association has just launched a tracker of cases in public K-12 schools. The tracker is broken down by state and shows schools and counties with known and suspected cases and deaths. By late August, it had already recorded more than 4,300 cases. The tool was originally created by Kansas theater teacher Alisha Morris. In early August, Morris was looking for data about coronavirus cases in U.S. schools. She could find local news reports about positive cases at individual schools across the country but nothing that gave her a cohesive picture of how much the virus was spreading in schools. So she built it herself with the help of other volunteers and then handed it off to NEA. Read more about the tracker and how schools are handling coronavirus cases as they emerge. Andre Coelho/Getty Images  Flu Season Is Mild In Southern Hemisphere, Suggesting U.S. May Be Spared A Flu Surge A surprisingly small number of people in the Southern Hemisphere have gotten the flu this year, probably because the public health measures put in place to fight COVID-19 have also limited the spread of influenza. That makes public health experts hopeful that the U. S. and other northern countries might not have a bad flu season this winter. Still, they warn against complacency and encourage people to get the flu vaccine. "Because influenza surprises us. Viruses surprise us," says Kanta Subbarao, of the World Health Organization. Read more about what's causing an unusually mild flu season in the Southern Hemisphere. +BONUS: What makes the coronavirus so "superspready"? More of this week's health stories from NPR Why some COVID-19 patients come off the ventilator but linger in comas Is it safe to ride a bus or subway? More space please! Home sales are booming as people adapt to staying home more We hope you enjoyed these stories. Find more of NPR's health journalism on Shots and follow us on Twitter at @NPRHealth. Your Shots editor, Carmel Wroth   What do you think of today's email? We'd love to hear your thoughts, questions and feedback: shots@npr.org Enjoying this newsletter? Forward to a friend! They can sign up here. Looking for more great content? Check out all of our newsletter offerings — including Goats & Soda, Daily News, Best of NPR and more! You received this message because you're subscribed to Health emails. This email was sent by National Public Radio, Inc., 1111 North Capitol Street NE, Washington, DC 20002 Unsubscribe  |  Privacy Policy

Older White Voters Up For Grabs; The Illness Affecting Young Athletes; The March On Washington

Plus, is it safe to get on a bus or subway?

by Jill Hudson and Suzette Lohmeyer Tyrone Turner/WAMU Stories and podcasts you may have missed...  Thousands of demonstrators descended on the nation's capital on Friday to demand an overhaul to the nation's criminal justice system and push for racial equality at the same site the Rev. Martin Luther King Jr. called for those same reforms decades ago in his iconic "I Have A Dream" speech. See photos from Friday's march and watch a video of stories from people who attended the 1963 march.  A person with a high viral load walks into a bar. That, according to researchers who study the novel coronavirus, is a recipe for a superspreading event. Just what makes this particular virus so … superspready? Inquiring minds also want to know: Is it safe to get on a bus or subway?  It has been three weeks since a massive explosion in Beirut's port. Thousands of volunteers from all over Lebanon have showed up in the city to help clear rubble and offer accommodation to hundreds of thousands who have lost their homes.  Young athletes — especially teen girls — can struggle with a breathing problem that is misdiagnosed as asthma. The real cause of the problem is in the vocal cords. The recent shooting of Jacob Blake in Kenosha, Wis., has brought discussions about the racial and economic divide in this growing bedroom community to the forefront. The world is also debating how to talk about Kyle Rittenhouse, the Illinois teenager who has been charged with the shooting deaths of two people — and the wounding of a third — as they protested for racial justice after Blake's death.  Newsletter continues after sponsor message Listen Up! Courtesy of Ayim Darkeh Ayim Darkeh, an emergency room doctor in New York City, spoke with his mother, Shirley, in June about his experiences with racism, dating back to childhood. Listen to the StoryCorps episode or read about it here.  Plus listen to Life Kit's tips on how to be "anti-racist."  How was the the richest and most powerful country in the world laid low by a virus only nanometers in size? Ed Yong, a science reporter for The Atlantic, says it's the inequities that have been with us for generations that made our body politic such opportunistic targets. Listen to this episode of Code Switch here or read interview highlights.  Older white voters — a demographic that played a big role in electing Donald Trump four years ago — may be up for grabs in this year’s election. Many say they are unhappy with his general behavior and how he’s handled the pandemic, but others intend to stick with him. Click here to listen or read the story.  Our Picture Show Pick Hannah Reyes Morales for NPR At 12 years old, Joan Garcia liked leaping into the sea and racing the boys to the nearest pylon. She liked playing tag. When she started having sex at 13, she thought it was just another game. Over a 10-year period, 1.2 million Filipina girls between the ages of 10 and 19 have had a child. That's a rate of 24 babies per hour. And the pandemic has only made the situation worse.  Earth, Wind And Fire  Stocktrek Images/Getty Images Water is everywhere on Earth — the clouds, the rain, the oceans and rivers, even our own bodies. Where all that water originally came from is a bit of a mystery. NPR's Nell Greenfieldboyce reports that scientists may have found the answer inside some rare meteorites. Take a listen or read about it here. We've already seen smoke from the fires in California reach all the way to Minnesota. And with all that smoke comes possible risks to human health. Listen to Short Wave explain what smoke is made of, how it behaves in the atmosphere and what is its role in climate change.  The upshot of climate change is that everyone alive is destined to experience unprecedented disasters — the most powerful hurricanes, the most intense wildfires, the most prolonged heat waves and the most frequent outbreaks of new diseases are all in our future. Listen here or read the story.  The Culture Club  Stocktrek Images/Getty Images A new documentary, Class Action Park, is the story of an infamous New Jersey waterslide park that opened in 1978, enjoyed great popularity in the 1980s and is now remembered in part for the injuries and deaths that gave it its nickname. Not surprisingly, it was very popular with teenagers. It was run by kids, too, and they had a really good time. Mostly, the film is about the people who remember Action Park and want you to know it wasn't all bad. Actor Chadwick Boseman, who starred in Black Panther, has died at the age of 43. A statement posted on Boseman's Twitter account on Friday said the actor had battled colon cancer for the past four years.  Billie Eilish played NPR’s Tiny Desk at what looks like the actual Tiny Desk! How did she do it?  What do you think of today's email? We'd love to hear your thoughts, questions and feedback: bestofnpr@npr.org Enjoying this newsletter? Forward to a friend! They can sign up here. Looking for more great content? Check out all of our newsletter offerings — including Daily News, Politics, Health and more! You received this message because you're subscribed to Best of NPR emails. This email was sent by National Public Radio, Inc., 1111 North Capitol Street NE, Washington, DC 20002 Unsubscribe  |  Privacy Policy