Sophia Gad-Nasr / is on Nostr

PhD in cosmology and astroparticle theory. I pick apart the Universe to figure out how it works. Science advisor. Dark matter hunter. 🇵🇱✡️🇪🇬☪️

Last Notes

2025-03-31 13:15:18

Okay this is pretty cool. Here's data from the JWST and MeerKAT radio telescope. This is taken neat the core of the Milky Way, where our supermassive black hole sits. There's tons of gas here, yet star formation is low. Of course, astronomers wanted to know why. Turns out that the strong magnetic fields in the region may prevent stars from forming: the magnetic fields prevent the collapse of gas by resisting the gravitational fierce that causes it!
https://scontent.cdninstagram.com/v/t51.75761-15/488307732_17905190076110983_4481690940316103555_n.webp?stp=dst-jpg_e35_tt6&_nc_cat=100&ccb=1-7&_nc_sid=18de74&_nc_ohc=XxyQWnZm49QQ7kNvgGgkSz4&_nc_oc=Adk8M6Q-TGixC_fpuI121igYmWXeewh707c8R-7u925qGn5bzhfp3XPpU4CmXjBx4HE&_nc_zt=23&_nc_ht=scontent.cdninstagram.com&edm=AMJMky4EAAAA&_nc_gid=IW9xM8iaAN2UxXAz6wjWpQ&oh=00_AYFvPpNpyk7UMR_0a68mQFItOk8Zqt4epu7SIFSWXkU9ng&oe=67F33D2C

2025-01-24 11:12:00

Everything we've tested has proven Einstein's general relativity correct. Galaxy clusters bending spacetime, gravitational waves, even how matter behaves around black holes. But we KNOW our understanding of gravity is incomplete because of the singularity. It's not a physical place. Rather, it signifies the breakdown of our laws. Singularities are infinities, and in physics, infinities tell us our equations aren't working. So the black hole singularity tells us our laws break down at that point.
https://scontent.cdninstagram.com/o1/v/t16/f2/m84/AQNE6daCDNNxXQa1MdaugxrOKnWWxHepz1GWyi_49kHHpY0kFCuJslYy8o6t4-xWkcemv1Y1BfMUIeLf5x6LqKtrOno7hzI9KpgfKaQ.mp4?_nc_ht=scontent.cdninstagram.com&_nc_cat=108&vs=1679528726310646_3351018869&_nc_vs=HBkcFQIYTGlnX2JhY2tmaWxsX3RpbWVsaW5lX3ZvZC9BRjQxNDM3NjIyMEI2NTg1OUQxQkQyMEQ4MTJEMTA4Rl92aWRlb19kYXNoaW5pdC5tcDQVAALIAQAoABgAGwGIB3VzZV9vaWwBMRUAACbig-W_upH4PxUCKAJDMywXQBTMzMzMzM0YEmRhc2hfYmFzZWxpbmVfM192MREAdeoHAA&ccb=9-4&oh=00_AYChP41Tlw60xYhLk6N0Bf3AbJIGUfnoy6nRnKQZrVhY9Q&oe=6795B1D1&_nc_sid=1d576d

2024-11-28 10:12:07

Alright, time to clear this up: in science, a theory is not a guess. It’s a well-tested explanation of how things work, and is supported by tons of evidence and repeated testing, for example, gravity is a theory. What people usually mean when they misuse the term "theory" is actually "hypothesis," which is an educated guess. This is why it doesn't make sense to say something is "just a theory." Theories are tried and tested, reproducible, and are the best way to describe the world around us.

2024-11-28 10:12:07