An anonymous reader writes: Researchers (https://www.sciencedaily.com/releases/2015/04/150411091607.htm) found there are two types of type Ia supernovas in the UV spectrum, one of which shows up more further away than the other type, leading them to say the universe isn't expanding as fast as thought. Other researchers (https://www.sciencedaily.com/releases/2016/10/161021123238.htm) redid the original finding of the accelerating expansion of the universe, this time with 10 times the data, showing that the universe is not accelerating. Take the two findings together, is it even expanding at all? If it is, it's most probably not accelerating. Then there's another researcher (https://m.phys.org/news/2011-10-supernovae-universe-expansion-understood-dark.html) who provides a theoretical basis for dark energy and dark matter, saying it's all been a miscalculation,
"As Annila explains, when a ray of light travels from a distant star to an observerâ(TM)s telescope, it travels along the path that takes the least amount of time. This well-known physics principle is called Fermatâ(TM)s principle or the principle of least time. Importantly, the quickest path is not always the straight path. Deviations from a straight path occur when light propagates through media of varying energy densities, such as when light bends due to refraction as it travels through a glass prism.
The principle of least time is a specific form of the more generally stated principle of least action. According to this principle, light, like all forms of energy in motion, always travels on the path that maximizes its dispersal of energy. We see this concept when the light from a light bulb (or star) emanates outward in all available directions.
Mathematically, the principle of least action has two different forms. Physicists almost always use the form that involves the so-called Lagrangian integrand, but Annila explains that this form can only determine paths within stationary surroundings. Since the expanding universe is an evolving system, he suggests that the original but less popular form, which was produced by the French mathematician Maupertuis, can more accurately determine the path of light from the distant supernovae.
Using Maupertuisâ(TM) form of the principle of least action, Annila has calculated that the brightness of light from Type 1a supernovae after traveling many millions of light-years to Earth agrees well with observations of the known amount of energy in the universe, and doesnâ(TM)t require dark energy or any other additional driving force."
Btw, why does slashdot only allow us to submit one link per post?