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YouTubeVeritasium
How to Understand What Black Holes Look Like
We have just seen the first image of a black hole, the supermassive black hole in the galaxy M87 with a mass 6.5 billion times that of our sun. But what is that image really showing us? This is an awesome paper on the topic by J.P. Luminet: Image of a spherical black hole with thin accretion disk Astronomy and ...
視聴回数: 1080.7万 回2019年4月9日
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Video: Atrial septal defect - Video Explanation! | Osmosis | Osmosis
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What is an atrial septal defect (ASD)? An ASD is a hole in the wall between the heart’s upper chambers. One of the most common heart defects in infants, ASDs vary in size and in the severity of symptoms they may cause. In some children, an ASD may close on its own without any treatment. If the ASD is still present by age 3, it likely will require surgery. Learn more. http://bit.ly/2KZB48E | The Society of Thoracic Surgeons (STS)
0:02
What is an atrial septal defect (ASD)? An ASD is a hole in the wall between the heart’s upper chambers. One of the most common heart defects in infants, ASDs vary in size and in the severity of symptoms they may cause. In some children, an ASD may close on its own without any treatment. If the ASD is still present by age 3, it likely will require surgery. Learn more. http://bit.ly/2KZB48E | The Society of Thoracic Surgeons (STS)
FacebookThe Society of Thoracic
視聴回数: 449 回2019年3月15日