Scientist, Planetary Science, Institute, Dr Pamela Gay discussed on Astronomy Cast

Astronomy Cast


CAST episode five eighty one other kinds novais welcome to China caster weekly faxes journey through the cosmos where we help you understand not only what we know how what we know. . I'm Brisbane publisher of the Universe today with me as always as Dr Pamela Gay a senior scientist for the Planetary Science, , Institute and the Director of course. . How you doing I'm doing well, , how are you doing good the word size just comes up your senior scientists working for a scientist a tude science science science. . It, , it's kind of the way I live my life. . It's nice to have people focused on science it is. . It is and Happy, , I Canadian thanksgiving. . Oh. . Yeah. . That's this weekend. . Yeah. . We're. . We're not that big about Thanksgiving around here in fact my. . My my sister calls no thanksgiving. . All, , right we we keep a pretty low key. . chloe's to be coming back from university for for Thanksgiving and we'll be hanging out so so. . Excellent. . Yeah. . But but. . Trying to organize like a Thanksgiving dinner is very complicated around the house so. . So ten we tend to make something Super Yummy. . That's all you name. . Yeah exactly. . But it's also you know as I mentioned year after year it's entire. . It's very civilized although I think this year. . Like, , nobody's be traveling in the US to attend Thanksgiving's so I think you have to worry. . But maybe in future years once the pandemic has wrapped up, , then consider adopting Canadian thanksgiving is your date because it's just. . Air travel traveling in general is a lot easier in in. . October than in November. . This is true and we're starting to get fall leaves. . So it's more. . than. . The the leaser. Great. . . Yeah. . November they're they're they've all fallen. . It's gross. . Yeah. . All right. . So don't ever accuse us of not comprehensively covering every kind of exploding star this week we gather ball the leftover ways that stars partially or fully explode don't probably enjoy. . Oh Pamela. . So I'm not GonNa lie I did absolutely zero preparation for this week's episode. . Because I have no idea. . What's In fact, , we were prepping like okay. So . what what's left and then you then proceeded to rattle off a whole bunch of ways it starts getting split I had no idea. . Had even had names but. . Why. . These these are in minimal exploding right moments in our life. . You gotTa Start and start gets brighter. . It could be an explosion, , it might not be. . And and this is where we have to go back to what does the word Nova mean it it's a new star and so Nova New Star. . Yeah. . So anytime, , a star decides, , Hey, , I, , may not have been visibly bright before but look at me now and hops into our sky. . That's a Nova. . And so far we've discussed where you have a compact object White Dwarf Neutron Star, , whatever that is stealing matter from a companion and periodically flares in brightness due to usually some sort of an exploded. . We talked many times in the past about supernova where an entire star decides I'm GonNa could boom either my outer atmosphere or all of myself and we've behind something or nothing depending on the stars mass and whim. . Yes. . Put. . There's other really cool stuff out there. . And the other cool stuff out there. . has produced some of the most beautiful didn't actually explode remnants for Hubble and other massive telescopes to point that. . So let's let's run through a couple of examples I guess of of of Stars that did something interesting but not in a traditional variable star sense because we've talked to them plenty of times but like weird variable stars, , Right Right. So . so here we have systems like I think the most famous may be Ada Karena. . exploded. . Ready. . Right well or not. . I, , mean here we have this this star that wasn't particularly noticeable Intel in the eighteen thirties. . It decided to suddenly do the opposite of bagel juice and it became brighter than Rachel. . Brightest, , stars in the sky. . It became the second brightest star in the sky for a while. . Just after serious. . It's had multiple episodes of getting brighter getting, , Fainter. . and. . It's thought that this humongous Nebula that is around it this it looks like an hourglass with an exploding waistline. . I don't know how five it. . Yeah. . So the hour glass of material around it is is thought to be material that was given off during its great eruption in the eighteen hundreds. . And its subsequent. . inning occurred when all of this material cooled and coalesced into dust and that dust hit the the two stars. . We now know that are lurking down in the center of this system

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