Bob Zimmerman, Kepler, BOB discussed on John Batchelor


I remind you all that you can travel to lunar orbit with the story of Apollo eight. Genesis by Bob Zimmerman, my guest and colleague Bob Zimmerman wrote this book some time back, but it is now an audio book. So you can listen to the triumph of NASA. Twentieth century NASA as navigated. I think that's the term that we should use for the Mon circumnavigated the moon and read from the bible on Christmas Eve as earth appeared earth rise appeared in the distance. Now, we come to other planets in our solar system in debate in two thousand eighteen and long long time. Now, we've defeated those who wanted to demote Pluto, but they're still at it out there. These people who want to redefine planets baba, very good evening to you. The I what is that. And what power do they have to tell us? What is the planet, and what is not? How much power they have. But they try to exert it to the international astronaut Michael union is an organization of astronomers and scientists planetary researches as well. But mostly astronomers, and you know, I don't know century or call the community decided they've gotta have some kind of organizing organized naming system. So that you know, everybody or names everything their own name. And then you've got multiple names gets very confusing. So the astronomers uses international organization to set up a system, so that the star names and galaxy names, and maybe asteroid names would have a system in some rule, and I use savages that well in this twentieth century, the U decided it really wasn't just simply doing this for strana mors. It was going to do it for the whole world. And it was gonna it was gonna be the people who are going to determine the names of everything. Everything down to the rock boulder. Mini crater. In the entire universe. And they they made a decision at oh six that actually was in rejecting their own committee's recommendations that they were gonna define planets in a way that would exclude Pluto is planet and a lot of planet. I I have not met really almost any planetary. Scientists who likes what they did the key to the definition was that any planet that exists has got to quote, clear its audit of other objects, which is an absurd statement and every planet tracks scratch their head as one comment on behind the black pointed out today that Jupiter's not a planet because this Trojan asteroids within its orbit it doesn't glued. It's all. But really, we've got nearer subjects. This is not a planet designed to get rid of Pluto. And there's reasons why it's complicated. I wanna get into that. What I want to say is though that scientists have not never accepted definition. No one else. Does it excludes exoplanets? You can't call them plan a stupid definition. And there was a paper on a peer reviewed bureau viewed science journal acres just this this end of August that basically slammed the they went through all the astronautical literature, and they could find almost no references to the need a planet clearing. It's audit. They say this fundamentally this is used definition, quote was eroneous literate literature review show that clearing orbit is not a standard that is used for distinguishing asteroids from planet has the claimed. This comes back to the simple fact that this planet period definitions bad, this is not the first pick in the last six months that have stayed the same thing. Planetary strana want to change the definition to something quite simple and practical, which is if a planet if an object is lodge enough to become spherical the gravity forces into shape. It's a plan. This means the mall would be a planet. That's okay. It would mean to you might create a secondary definition to what planets you'd have to decide what the diameters, but that's what they want you. It's just clinical, and it should be dumped. There's no question of that. And the moon as could promoted to a planet would be a good thing. Bob because it's an outlier for the moons of our solar system is very large. And that's actually, right. Hey, look, John there a plan there are moons around Jupiter Saturn that a larger than the traditional planets like mercury larger than that. And tell me. This is the planet. We treated like a planet. We have to and Pluto when it was seen by new horizons clearly a planet. It's got active geology, even though it's so far the son the so little energy there. So, you know, it's it's an excellent. It's again, the definition planet, though, extra planet is a planet. It's gotta be changed tests. What is test? Bob was the launch by a national that new exit planet. Space telescope was essentially designed to do what Kepler has been doing but much better covering much more of the sky, and it was launched this year. And after getting commissioned and set up it has begun its work, and they released this week their first batch of exile planet candidates, they expect to find as many as ten thousand lodge planets, though, its main goal is to find at least fifty world's no more than four times. The size of the earth is I? Set of batches has seventy three objects in it. Lisa candidates. So we should say they say between five and twenty percent will be false alarms, but others might not be. So they'd be confirmations. And this is just going to be taken to be turning turning out these candidates now for the next decade. I would say we the limitation. We've had so far say was Kepler and others is that Kepler was only able to observe the stuff that was close in because it needed more years to study is tests going to give us more years. So that we can get the smaller planets just to make it clear to the audience these they're looking to transients these are things moving across the face of Staw as it orbits the star. And so if it only goes at once every year, you've got to look at least three years to see the transit happening three times to really get a firm. Planetary candidates for something like the earth at an earth orbit. So most of the planet sexual planets that. Keppel found were or inside the over the mercury. They would you know within days or months co by tests have somewhat similar problem. It's looking for transient. So it's the same kind of thing. But you know, it's it's designed to work for a long time. And you know, it's just a matter of time. We just have to give it time to work. And this is you know, I think the design a tests will last longer than Kepler. We go to Jupiter. We have a pro but Jupiter probe doing very well. And now we're studying Jupiter's magnetic field, which Bob you characterize weird. But then again, everything about Jupiter is unusual everything about every object in the solar system is weird. That's what makes me so fascinated with all of this stuff. Juneau was designed not so much to take pretty pictures. They have a camera, but that's not it's focused. It's designed study. Environment of Jupiter as well as it's it's magnetic field its core, its internal workings using a variety of sensors. And so the most recent data from Juno has revealed that Jupiter's magnetic magnetic field actually acts like it has three polls. You know, like a ball magnet. That's kinda split at one end. It's got an office south pole. But it's got another one near the equator. So think of a ball magnet would have a polity Chen. But if you take one of the ends kinda split it. And then bend one of those ends off it you'd have actually to one end. And that's what they've got here today at any of the understanding of exactly why. And anyone gives you a definitive consensus answers. Why we don't really, you know, it has a clearly to do with the size and the gas nature of this class giant. But we don't really understand this. We have it it expresses actually, the the limitations of our knowledge having to do with magnetic field from selves things like the son, Andrew, we don't really understand why they form and how they form structure with compass. Designing accomplished for Jupiter is going to be a challenge. I look focus won't work. Uh-huh. This week of practice, even as we speak. Hi, a booster to is gonna do address rehearsal of its landing on right? Very you grew. It's not gonna land. This is just a dress rehearsal. Maneuvering near the the object, but has a fleet of Kini mini Landers. It's got to that name Minerva. And then it's got it's got three, and they maneuver I'm sorry, and that's another one called mascot and two of maneuver, the two of them maneuvre land for land is going to go down on September twenty first and then the mascot mini. Lander will go in and October third and then in late October is going to try to land and grab it sample sometime later, the third maneuver us land will go down. This is just part of what is going to be an incredibly busy planetary fall season..

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