This is Why Physics Can't Totally Explain the Universe's Expansion
%2Favatars%2FBUoTZ6lM79yi.jpg&w=96&q=75)
/2023/02/26/image/jpeg/wEs7jmzycdxiRuhcMtsbSGYwlnn80SZYAoRVatkQ.jpg "This is why rockets don’t crash into airplanes")
/2023/02/12/image/jpeg/jn8Hgiy2rHbGud5e9z4SRnZkMQZzeAkP0Vi8cLir.jpg "Here's how tectonic shifts caused the Turkey-Syria earthquake")
/2023/09/27/image/jpeg/NkLowKFkYRa5HSpVpzAqp8LxzcqazLWg5FPsmprr.jpg "How this Chinese hypersonic fleet killer will counter U.S. Navy")
/2023/09/26/image/jpeg/zHjalQG1HPbbeDvmS7EoO2EavIo4eaQxvwe5LgUD.jpg "Why we put wind turbines underwater")
/2023/09/25/image/jpeg/QrGYVahotQMvit1WXPMwhWH2HcKqtALSZo6UJyXS.jpg "How Will M10 Booker make The U.S. Army Unstoppable")
/2023/09/24/image/jpeg/KzrjnGeg73nBp79gp6uG4mGSP6z49OiIU7hLlAlx.jpg "Should police have marijuana tests?")
/2023/09/23/image/jpeg/Kap6NAa8IoTyQmZQEwB4waL2MWykBpyJc9piLpRK.jpg "The genius engineering behind 3D-printed rockets")
/2023/09/22/image/png/XFtYdTc2b3TtGseTakit2zAk7zByRIYyUKGewjOl.png "Small robot that can reforest the whole planet")
/2023/09/21/image/jpeg/CBVh8844CyZW0BUmphFlksoDPFxyFFKSmNCRoJFa.jpg "Motagua River: The most trashed river on earth")
/2023/09/20/image/jpeg/fpEIKq8CApvDrs3NDGbRHy8i9cNeVPW2x22WkG7e.jpg "Why China and Russia can not match USS Gerald R. Ford")
We know that the universe is expanding but we can't really explain how or agree on how fast. That's what the good people at SciShow Space explain in this video.
Astronomers have gotten pretty good at calculating how fast this expansion is happening. There are two main methods for measuring this: observing astrophysical objects or using the laws of physics to extrapolate.
But those methods don't agree. And according to a new study that might not be a mistake: the numbers might actually be different.
One of the ways of calculating this expansion is calculating the distances to stars called a cepheid. In a new study, researchers looked at 70 cepheids from a nearby dwarf galaxy.
They found that the universe was expanding at a rate of 74.3 km/s/Mpc. The number is in line with other previous finds.
However, it does conflict with other measurements. One conflict is from the cosmic microwave background (CMB) study.
This is the oldest light in the universe that humanity will ever see. It has helped discover how fast the universe was expanding 13 billion year ago.
They have also used the rates to extrapolate how fast the universe is expanding now and the result is different from the cepheid-based data. Now, we have a conundrum but we will let SciShow Space explain this problem.
SHOW COMMENT (1)
/2023/09/27/image/jpeg/hU07XtyG7GvSo5QfCALfndeNFpZceMzzMBKd89Tc.jpg "Mihai Gruieti: ‘AI doesn’t take jobs, it transforms them’")
/2023/08/17/image/jpeg/wkfQOEAHMgv7YekMUPWWlPJGY7Fn1Pa2blepLs4m.jpg "Too hot to fly? The effects of heatwaves on air travel")
/2023/08/30/image/jpeg/79rLCSNuXkygYT4n4NHbsaeEzi0PBuvPGTEd9Hl5.jpg "Are smart phones destroying our mental health?")
/2023/09/27/image/jpeg/NFaM0tDwG2mZ166yLop9g0QMdp6RifdfMhkSwWgs.jpg "Sam Altman and Jony Ive in conversation to build AI hardware")
/2023/09/12/image/jpeg/7ZU03vLOnlFnHbET1pxVv2vlF9S2R5ZekupSiNl0.jpg "From lost wings to ruptured fuselages, 7 times planes refused to die")
/2023/08/26/image/jpeg/dx4nDIYOH40PorY0ptnpC1JymO0nUKbTPQy7XNly.jpg "9 examples of when AI went haywire")
/2023/09/07/image/jpeg/xoPruys7ISOZUopRgsd0FMoNwmVlULDmnFUamkjf.jpg "Is fusion energy getting any closer to reality?")
/2023/09/27/image/jpeg/hfwqh8bvNqLMqZdrgfT094SMsKmlGyPYf0W1Cdr9.jpg "WGA strike called off: Was it a big AI win for writers?")
/2023/09/27/image/jpeg/4G3PRWatxk8bhsGpNmXl7KX3QebUD2tNPDjUwl8I.jpg "Tesla and co attempt to impress with a humanoid bot video")
/2023/09/27/image/jpeg/D5grL8cEJaObBHeKsDpcbOmAxvnIDYxp1iK3DNmQ.jpg "Georgia faces brain-infecting worm invasion, study warns")