Walkabout the Galaxy
Sun, helioseismology, dark matter
Astrophysics and Astronomy | Physics
The Sun doesn't just shine, it rings like a bell, or a drumhead wrapped into a ginormous ball of incandescent plasma. The astroquarks talk about how helioseismology tells us about the interior of the Sun, and new research shows some surprising changes in the Sun's outer layers. And the disappointing news from the realm of cosmology is that dark matter is probably not warm and fuzzy, depriving us of endless opportunities for jokes, not to mention that it would be awesome if we had fuzzy dark matter throughout the universe. Catch up on the latest astronomy, nerd news, and space trivia with the astroquarks on this episode of Walkabout the Galaxy.
We'll have this sponsor message done for you in a jiffy. Depending on how you define jiffy, of course, which is the best thing about this flexible and adaptable measure of time. Astrophysicist? Well you might use this term to describe the time it takes light to travel a distance of one fermi (3 times 10^-24 seconds). Video game programmer? Then a jiffy for you is a seemingly eternal 10 milliseconds. Electrician? Well you’re probably talking about 1/60th of a second if you’re in the USA, or 1/50th of a second most other places. Crazy cosmologist? Then you can have the jiffy be the Planck time: 5.4 times 10^-44 seconds. A ridiculously short time corresponding to the ridiculously short Planck length. So as you go on your walkabout the galaxy, the jiffy is there, tick-tocking along, to help you keep track of the temporal dimension. Note: the jiffy is not to be confused with Jiffy Pop popcorn, Jiffy bag mailing envelopes, Jiffy lube auto shops, Jiffy mix bake mix, Jiffy steamer clothing steamers, Jif peanut butter, Jif lemon juice, or retired Welsh rugby star Jonathan "jiffy" Davies.
© Joshua Colwell, All Rights Reserved
Length of Episode
Colwell, Joshua; Dove, Adrienne; and Cooney, James, "Cold and Hard, not Warm and Fuzzy" (2017). Walkabout the Galaxy Podcast. 23.