Mercury, Fraser Cain, Astronomy Casper discussed on Astronomy Cast

Astronomy Cast


Astronomy Casper weekly facts based journey through the cosmos where we help you understand not only what we know. But how we know what we know I'm Fraser Cain publisher of University with me as always Dr Pamela Gay a senior scientists for the Planetary Science Institute and the cosmic if how you doing I'm doing well, how are you doing? Too. Good. Boy I've I've been talking a lot about life on Venus though that's that's my life that is the new. That is the new reality is just talking about life house life. I could be making the life, but the part that I love is the response now that there are some cool missions in the works that people are thinking of to send. I've seen a couple of really great ideas. Now, we've got people have something very specific to look at. So hopefully, we'll be able to follow up in a couple of years with some cool missions to. I hope. So it's the thing that really frustrates me is I know the timescale of going from thinking about a mission to building in sending the Michigan and it's like I want them to go figure this out while I'm alive. But the good thing is the Venus only takes a couple of months to reach. So it's Zaddar or or Mercury, right? Yeah. Mercury's a tough one to get to. But but hopefully, we'll get some answers. We'll get some answers for you everybody. Now. I've got some bad news for you though stars die they do at some point in the next few billion user. So our son is going to start heating up using a ball the fuel in its core, and then eventually die becoming a white dwarf. It'll then slowly cooled down to the background temperature of the universe becoming a black dwarf. Let's learn about this fascinating process. What's the timescale are versed? Why is the Son Dying? I mean we're all dying board and immoral. So the say it add ultimately it's just gonNA run out of energy. So the way that stars shine and support themselves in their core they're undergoing nuclear reactions now, exactly where in the core depends on the stage of evolution. Initially WANNA start turns on it's burning. Hydrogen it's it's going through the Proton Proton process and. All the light that has generated during this fusion because when the particles come together, they release energy as they fuse into something new and that energy pushes out against gravity supporting the outer layers of the star. And eventually, it runs out of fuel in the core. Yeah. So it's eventually going to run out of hydrogen in the core. The star is going to go through different changes in luminosity changes in color changes in size, it's GonNa end up burning hydrogen in a shell..

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