How to pronounce “interstellar medium” in English

investigating with the telescope, what really makes the internal structures of planets different when planetary systems form. So I find that amazing.The second question that's getting a lot of attention this year is: How do galaxies lose their interstellar medium and transition from star-forming galaxies to galaxies that aren'tforming stars? We call them quiescent.

And when they exploded as gigantic supernovae, the elements that they had been cooking up, the additional elements that they had been cooking upin their cores to sustain their luminosity, to shine, even for their short lives, they were expelled into the interstellar medium,into the universe. And that changed everything because now the universe consisted not just of hydrogen and helium and lithium,

We have this kind of overview here of the cycle of life of stars and planets, which starts with very high mass stars generatingthe heavy elements in their course through nuclear fusion, through supernovae returning on winds, returning that material to the interstellar medium.That kind of mills around in a galaxy for millions or hundreds of millions of years but then slowly gets reincorporated into dust clouds, which can then collapse