Since we don't know what dark matter is, the answer is: for every possible candidate for the dark matter there is a different strategy to search for it. People build giant detectors deep underground (to get away from all the other particles streaming through the environment around us) and ...
What we know about dark matter and what we have yet to discover\nAstronomical observations have confirmed dark matter's existence, but what exactly is dark matter? In What Is Dark Matter? , particle physicist Peter Fisher introduces readers to one of the most intriguing frontiers of physics. ...
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相关知识点: 试题来源: 解析 C。解析:文章中明确提到“Dark matter is a form of matter that does not interact with light or other electromagnetic radiation”,即暗物质是一种不与光或其他电磁辐射相互作用的物质。反馈 收藏
What is dark matter? A. Matter that interacts with light. B. Matter that does not interact with light but can be detected by its gravitational effects on visible matter. C. A mysterious force that causes the expansion of the universe to accelerate. D. Regions of space where the ...
Read more about dark matter from NASA Education. Learn more about the difference between dark matter and dark energy, from NASA Science. Watch this recording of a public lecture given by Fermilab physicist Dan Bauer, explaining what dark matter is, and why it matters. Sign up for the Li...
What Is Dark Matter? Dark matter accounts for five times as much of the universe as ordinary matter. However, we know little about it other than that it only interacts with ordinary matter through gravity. Despite our lack of knowledge, scientists do have overwhelming indirect evidence for dark...
By modern estimates, the universe is only about 5% regular matter and energy and about 27% dark matter, or more than five times as much. The remaining 68% of the universe is thought to be dark energy—a topic for another day. Credit: NASA's Goddard Space Flight Center The fact ...
Back in 1933, most of the universe went missing. According to many astronomers, it’s still missing. We’re talking about dark matter which can’t be seen. So, how do we know that dark matter exists? Bob Berman explains what dark matter is—and isn’t. ...
Yet each time people learn about it in a new context, many get confused or surprised. There is no reason that the matter we see should be the only type of matter there is. The ex- istence of dark matter might be exp ected and is compatible with everything we know. Perhaps ...