Latest news with #Siah
Yahoo
25-05-2025
- Science
- Yahoo
Does outer space end – or go on forever?
Curious Kids is a series for children of all ages. If you have a question you'd like an expert to answer, send it to curiouskidsus@ What is beyond outer space? – Siah, age 11, Fremont, California Right above you is the sky – or as scientists would call it, the atmosphere. It extends about 20 miles (32 kilometers) above the Earth. Floating around the atmosphere is a mixture of molecules – tiny bits of air so small you take in billions of them every time you breathe. Above the atmosphere is space. It's called that because it has far fewer molecules, with lots of empty space between them. Have you ever wondered what it would be like to travel to outer space – and then keep going? What would you find? Scientists like me are able to explain a lot of what you'd see. But there are some things we don't know yet, like whether space just goes on forever. At the beginning of your trip through space, you might recognize some of the sights. The Earth is part of a group of planets that all orbit the Sun – with some orbiting asteroids and comets mixed in, too. You might know that the Sun is actually just an average star, and looks bigger and brighter than the other stars only because it is closer. To get to the next nearest star, you would have to travel through trillions of miles of space. If you could ride on the fastest space probe NASA has ever made, it would still take you thousands of years to get there. If stars are like houses, then galaxies are like cities full of houses. Scientists estimate there are 100 billion stars in Earth's galaxy. If you could zoom out, way beyond Earth's galaxy, those 100 billion stars would blend together – the way lights of city buildings do when viewed from an airplane. Recently astronomers have learned that many or even most stars have their own orbiting planets. Some are even like Earth, so it's possible they might be home to other beings also wondering what's out there. You would have to travel through millions of trillions more miles of space just to reach another galaxy. Most of that space is almost completely empty, with only some stray molecules and tiny mysterious invisible particles scientists call 'dark matter.' Using big telescopes, astronomers see millions of galaxies out there – and they just keep going, in every direction. If you could watch for long enough, over millions of years, it would look like new space is gradually being added between all the galaxies. You can visualize this by imagining tiny dots on a deflated balloon and then thinking about blowing it up. The dots would keep moving farther apart, just like the galaxies are. If you could keep going out, as far as you wanted, would you just keep passing by galaxies forever? Are there an infinite number of galaxies in every direction? Or does the whole thing eventually end? And if it does end, what does it end with? These are questions scientists don't have definite answers to yet. Many think it's likely you would just keep passing galaxies in every direction, forever. In that case, the universe would be infinite, with no end. Some scientists think it's possible the universe might eventually wrap back around on itself – so if you could just keep going out, you would someday come back around to where you started, from the other direction. One way to think about this is to picture a globe, and imagine that you are a creature that can move only on the surface. If you start walking any direction, east for example, and just keep going, eventually you would come back to where you began. If this were the case for the universe, it would mean it is not infinitely big – although it would still be bigger than you can imagine. In either case, you could never get to the end of the universe or space. Scientists now consider it unlikely the universe has an end – a region where the galaxies stop or where there would be a barrier of some kind marking the end of space. But nobody knows for sure. How to answer this question will need to be figured out by a future scientist. Hello, curious kids! Do you have a question you'd like an expert to answer? Ask an adult to send your question to CuriousKidsUS@ Please tell us your name, age and the city where you live. And since curiosity has no age limit – adults, let us know what you're wondering, too. We won't be able to answer every question, but we will do our best. This article has been updated to correct the distances to the nearest star and galaxy. This article is republished from The Conversation, a nonprofit, independent news organization bringing you facts and trustworthy analysis to help you make sense of our complex world. It was written by: Jack Singal, University of Richmond Read more: The art of Aphantasia: how 'mind blind' artists create without being able to visualise Why your zodiac sign is probably wrong Why do people look into space with telescopes but not binoculars? Jack Singal does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond their academic appointment.
Yahoo
27-04-2025
- Science
- Yahoo
Does outer space end – or go on forever?
Curious Kids is a series for children of all ages. If you have a question you'd like an expert to answer, send it to curiouskidsus@ What is beyond outer space? – Siah, age 11, Fremont, California Right above you is the sky – or as scientists would call it, the atmosphere. It extends about 20 miles (32 kilometers) above the Earth. Floating around the atmosphere is a mixture of molecules – tiny bits of air so small you take in billions of them every time you breathe. Above the atmosphere is space. It's called that because it has far fewer molecules, with lots of empty space between them. Have you ever wondered what it would be like to travel to outer space – and then keep going? What would you find? Scientists like me are able to explain a lot of what you'd see. But there are some things we don't know yet, like whether space just goes on forever. At the beginning of your trip through space, you might recognize some of the sights. The Earth is part of a group of planets that all orbit the Sun – with some orbiting asteroids and comets mixed in, too. You might know that the Sun is actually just an average star, and looks bigger and brighter than the other stars only because it is closer. To get to the next nearest star, you would have to travel through trillions of miles of space. If you could ride on the fastest space probe NASA has ever made, it would still take you thousands of years to get there. If stars are like houses, then galaxies are like cities full of houses. Scientists estimate there are 100 billion stars in Earth's galaxy. If you could zoom out, way beyond Earth's galaxy, those 100 billion stars would blend together – the way lights of city buildings do when viewed from an airplane. Recently astronomers have learned that many or even most stars have their own orbiting planets. Some are even like Earth, so it's possible they might be home to other beings also wondering what's out there. You would have to travel through millions of trillions more miles of space just to reach another galaxy. Most of that space is almost completely empty, with only some stray molecules and tiny mysterious invisible particles scientists call 'dark matter.' Using big telescopes, astronomers see millions of galaxies out there – and they just keep going, in every direction. If you could watch for long enough, over millions of years, it would look like new space is gradually being added between all the galaxies. You can visualize this by imagining tiny dots on a deflated balloon and then thinking about blowing it up. The dots would keep moving farther apart, just like the galaxies are. If you could keep going out, as far as you wanted, would you just keep passing by galaxies forever? Are there an infinite number of galaxies in every direction? Or does the whole thing eventually end? And if it does end, what does it end with? These are questions scientists don't have definite answers to yet. Many think it's likely you would just keep passing galaxies in every direction, forever. In that case, the universe would be infinite, with no end. Some scientists think it's possible the universe might eventually wrap back around on itself – so if you could just keep going out, you would someday come back around to where you started, from the other direction. One way to think about this is to picture a globe, and imagine that you are a creature that can move only on the surface. If you start walking any direction, east for example, and just keep going, eventually you would come back to where you began. If this were the case for the universe, it would mean it is not infinitely big – although it would still be bigger than you can imagine. In either case, you could never get to the end of the universe or space. Scientists now consider it unlikely the universe has an end – a region where the galaxies stop or where there would be a barrier of some kind marking the end of space. But nobody knows for sure. How to answer this question will need to be figured out by a future scientist. Hello, curious kids! Do you have a question you'd like an expert to answer? Ask an adult to send your question to CuriousKidsUS@ Please tell us your name, age and the city where you live. And since curiosity has no age limit – adults, let us know what you're wondering, too. We won't be able to answer every question, but we will do our best. This article has been updated to correct the distances to the nearest star and galaxy. This article is republished from The Conversation, a nonprofit, independent news organization bringing you facts and trustworthy analysis to help you make sense of our complex world. It was written by: Jack Singal, University of Richmond Read more: The art of Aphantasia: how 'mind blind' artists create without being able to visualise Why your zodiac sign is probably wrong Why do people look into space with telescopes but not binoculars? Jack Singal does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond their academic appointment.
Yahoo
28-01-2025
- Business
- Yahoo
Cagent Vascular Initiates the Serranator® POINT FORCE Observational Registry
Study Will Enroll a Minimum of 500 Patients Across 30 United States Centers, Demonstrating the Benefits of Cagent's Unique Serration Balloon Angioplasty Technology in Real-World Clinical Cases WAYNE, Penn., January 28, 2025--(BUSINESS WIRE)--Cagent Vascular, Inc., the exclusive developer of serration technology for vessel dilation in endovascular interventions, today announced the start of the POINT FORCE Registry, a post-market clinical follow-up study of the Serranator® PTA Serration Balloon Catheter. This prospective, multicenter, single-arm study will enroll a minimum of 500 subjects at up to 30 centers in the United States. The objective of this study is to evaluate the safety and efficacy, under local standard of care, of Serration Angioplasty for the treatment of Peripheral Artery Disease (PAD) throughout the entire leg. The primary endpoint for this study is Device Success, defined as the achievement of successful delivery, balloon inflation and deflation, and retrieval of the study device with a post- Serranator® residual stenosis of ≤30%, as assessed by an independent angiographic core lab. Yale Cardiovascular Research Group in New Haven, CT, will serve as the corelab for this study. Led by national co-principal investigators S. Jay Mathews, MD, MS, Director Cardiac Catheterization Laboratory, PERT & Structural Heart at Manatee Memorial Hospital in Bradenton, FL and Michael Siah, MD, Director of Limb Salvage at University of Texas Southwestern (UTSW) Medical Center in Dallas, TX, this registry will build the body of clinical evidence for Serration Angioplasty. The first POINT FORCE patient was enrolled at UTSW by Dr. Siah. "We're excited to launch the POINT FORCE registry with the initial enrollment here at UTSW," Dr. Siah said, "Serranator® is a key part of our ATK and BTK treatment algorithm, and our team is eager to analyze this large, corelab-adjudicated dataset to capture the results of treating with Serranation across a wide spectrum of treatment strategies and clinical presentations." "We know from prior corelab-adjudicated studies that Serranator® provides an efficacious result for patients, with a very low rate of complication and mitigated recoil," stated Dr. Mathews, "What we endeavor to understand In POINT FORCE is the role Serranation can play in routine clinical practice. We anticipate reviewing Iliac, Fem-Pop, Infra-Pop, and Infra-Malleolar vessel territories, along with AV Access." Brian Walsh, Chairman and CEO of Cagent Vascular, added, "Despite having performed over 20,000 procedures, Serranator® remains a new and disruptive PAD therapy. We expect POINT FORCE will illuminate the benefits of Serranation and help share the impact in all common clinical algorithms. We're excited to get started and grateful for the support of our PIs and all participating centers." About Cagent Vascular, Inc. For more information, visit The Serranator® is an FDA-cleared, novel balloon using proprietary stainless steel micro-serration technology, designed to create linear, interrupted scoring along the endoluminal surface. With 1,000x more point force compared with plain-old balloon angioplasty, serration occurs during slow-and-low balloon inflation and is designed to aid arterial expansion, effectively achieving luminal gain in all lesion morphologies. View source version on Contacts Cagent Communications and Media Contact:Lauren Pfeiffer+1 610-688-2006LPfeiffer@ Sign in to access your portfolio
