I Testing for dark energy using the Local Group

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Astrophysicists have created a new method to measure the cosmological constant by analyzing the dynamics of the Local Group. This approach currently provides constraints on dark energy that are five times less effective than existing methods. However, researchers believe that improvements will soon enhance its effectiveness to match current measurements. The study highlights the potential of using local cosmic structures to gain insights into dark energy. This advancement could significantly contribute to our understanding of the universe's expansion.
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Unfortunately, it is so far five times less constraining than other measures, but promises to improve to be comparable with existing measures soon.
 

Thread 'Project Progress Report and possible Radio Astronomy Technique?'

Some 8 years ago I posted some experiments using 2 Software Defined Radios slaved to a common clock. The idea was measure small thermal noise by making correlation measurements between the IQ samples from each radio. This is a project that has kinda smoldered in the background where I've made progress in fits and starts. Since most (all?) RA signals are small thermal signals it seemed like the technique should be a natural approach. A recent thread discussing the feasibility of using SDRs to...
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