It pulsates, varying in brightness in a predictable cycle, and is categorized as a Cepheid variable star. While Polaris is the current North Star, this title is transient due to the gradual change in Earth's axial orientation, a phenomenon known as axial precession. In about 12,000 years,...
Hubble used the light curves of the Cepheid variables to measure their distances from Earth and found that they were much farther away than the known limits of the Milky Way. Therefore, these spiral nebulae were indeed other galaxies outside our own. There are still many mysteries surrounding ...
1. Bar charts (HLC / OHLC)– This is the most widely used chart and the default I use myself on this site. It is constructed to show four pieces of information: opening price (optional), closing price, high of the day, and low of the day. Looking at each day’s history, a vert...
The number of Astronomy related Internships/Summer Schools/Camps/Conferences are endless, thus this will provide a beginning to your search of things to do in those long summer holidays (or simply if you just want to go off and explore another country). I’ve tried to make sure that most ...
How can you use objects like supernovas and Cepheids to determine distances and other astronomical phenomena? By calibrating their luminosity, we can use their brightness and the inverse square law to determine their distances. Additional resources Watch a video explaining Aristarchus' approach to...
I was surprised to see how different the accuracies of Abbott ID Now and Cepheid Xpert Xpress tests were; I'd previously been thinking of all nucleic acid tests as similarly accurate, but the Cochrane metastudy suggests that the Abbott ID Now test is not meaningfully more predictive than a...
Majaess, D.J., Turner, D.G., Lane, D.J.: Characteristics of the galaxy according to cepheids. MNRAS 398, 263–270 (2009) Article ADS Google Scholar Malkin, Z.M.: Analysis of determinations of the distance between the sun and the galactic center. Astron. Rep. 57, 128–133 (2013...
running a quality logistics process has become increasingly important for every medical device and diagnostic equipment company interested in growth. And while there are many components to such a process, logistics professionals say that one of the most important—and easiest to control—is selecting ...
So if you can measure how quickly a star of this type -- aclassical cepheid variable-- undergoes this oscillation, youknowhow intrinsically bright it is! And if you measure how bright itappearsto be, then you can figure out how far away itmustactually be!
Several of Danaher’s operating companies are directly involved in the fight to diagnose and find a treatment for the coronavirus: IDT is working to supply primers and probes designed to detect the virus, and Cepheid is working to develop a molecular diagnostics test to use on its GeneExpert ...