Walkabout the Galaxy
water on Mars, general relativity
Astrophysics and Astronomy | Physics
In this week's "water on Mars" there's actual news of a potential liquid water reservoir on the red planet today. Well, more in it, than on it, but that adds it to the icy moons with subsurface lakes. This lake is very cold, so that water must be very salty. The astroquarks bring you up to date, touch on a new verification of general relativity, and most importantly delve into obscure superheroes and super-energetic cosmic rays. Great name for a rock band by the way. Catch it all on this episode of Walkabout the Galaxy.
The Oh-My-God Particle
A Tesla in ludicrous mode may get from from 0 to 60 in 2.8 seconds, but this cosmic ray detected in 1991 has the particle speed record at 99.99999999999999999999951% (21 9's after the decimal) of the speed of light. That's right: a proton traveleing so fast that a beam of light would take over 200,000 years to gain an edge of 1 centimeter. That's right: its relativistic speed increased its mass by more than 300 billion times, giving this subatomic particle the same energy as a baseball hurled by the strange astroquark. So keep your eyes open on your walkabout the galaxy, for the Oh-My-God particle zipping by -- or through -- you. It's got places to go and things to smash into.
© Joshua Colwell, All Rights Reserved
Length of Episode
Colwell, Joshua; Dove, Adrienne; and Cooney, James, "Really Real Actual Water IN Mars. Probably." (2018). Walkabout the Galaxy Podcast. 56.