Walkabout the Galaxy
heliosphere, Cassini, Voyager
Aylia Colwell, Tracy Becker
Astrophysics and Astronomy | Physics
Josh and Addie welcome two special guests for this episode of Walkabout the Galaxy where we learn about a new and clever measurement of the size and shape of the heliosphere. Cooler still, some of the critical data came from our old friend Cassini and even older friends the Voyager spacecraft. All this, plus trivia, nerd news and a galaxy-sized wave of hot gas.
The Big Empty
So you found my little hideaway. Where can I hide, I thought, from those nosy humans and their meddlesome space probes. No asteroid seems to be too small to attract their attention these days. And forget about the Moon and Mars. Pluto seemed like a safe bet for a while, but now they're out there too. But I know how much engineers loathe risk so I thought no place would be safer from prying space craft eyes than the space between Saturn's rings and its atmosphere. And then sure enough, along comes Cassini, threading the needle. The Big Empty used to be my home; while I've had to move once again, catch me if you can.
© Joshua Colwell, All Rights Reserved
Length of Episode
Colwell, Joshua; Dove, Adrienne; and Cooney, James, "The Solar System is a Bubble in Space" (2017). Walkabout the Galaxy Podcast. 14.