A Grand Tour of 55 Cancri

Ajouté : 2026-06-07

[00:00:00]55 Canank is probably one of the most famous exoplanet systems we've discovered so far. And that's mainly because of the planet Jansen, which you might know as 55 Canankree E. This 8 Earth mass lava world is usually one of the first exoplanets people hear about due to it being a combination of being a very early exoplanet discovery and just a genuinely interesting world. Of all the popular exoplanets, it's probably one of the most deserving of the hype.

[00:00:24]However, 55 Cananker has a lot more to offer than just Jansen. The E and the scientific designation 55 can E suggest it was the fourth plant discovered in its system mean there's a 55 can B C and D as well. This is the main reason why I made my previous version of a Grand Tour 55 can about 2 years ago. Every planet in the system is super interesting and worth talking about and all have their own unique environments. However, a lot has changed since 2024. We not only now know a lot more about Jansen than we previously did, but several new plants have been discovered in the system, and some have become disputed in light of new data. 55 Cananker has changed a lot since I first covered it. So, I figured it was worth revisiting with a new grand tour of the entire system.

[00:01:07]So, this video will be a tour of the 55 Canank system, including all the information we know about its two stars and eight planets, six confirmed and two unconfirmed. There's a lot to cover here, but when you're done watching this video, be sure to check out the rest of my Grand Tour series, where I'll be both covering some new systems and making updated versions of the systems I've covered so far, including Alpha Centauri, Trappist 1, Upsilon, Andromeda, Muare, and many more. Also, tell me in the comments what other systems I should cover in future episodes.

[00:01:34]Anyways, we'll start at the center of the 55 Canank system before moving outward. 55K is a binary star system composed of two stars, Capernicus and 55K B. Copernicus is the larger and central star and it was given the official name in 2015 by the International Astronomical Union along with the at the time five confirmed planets orbiting it. All the objects in the system have been named after important European astronomers similar to the epsilon Andromeda system which was also named after important Muslim astronomers at the same time.

[00:02:06]Capernacus is a K-type star about 90% the mass of the sun, though 98% of its radius. This is because it's on the cusp of leaving the main sequence phase of its life and becoming a red giant. The system is estimated to be about 8.6 billion years old, putting Capernacus on the tail end of its main sequence lifespan. Capernacus is also an extremely metal-rich star containing far more elements heavier than hydrogen and helium than the sun. A star's metalicity is extremely important for planet formation around it. As more metalrich stars tend to have larger planets. This is because planets are generally made of the same things as a star they form around. Meaning when 55 can forming its protolanetary disc was similarly metalrich. Heavier elements have an easier time clumping together compared to lighter gases like hydrogen resulting in larger faster growing planetary cores which eventually results in larger planets. This is likely the reason why the smallest currently known planet orbiting capernicus is eight times larger than Earth.

[00:03:02]Capernacus also has a high carbon to oxygen ratio, meaning it has a comparatively much larger amount of carbon in its system compared to ours, which will also be reflected in its planets, which is a great time to start talking about 55 Cananker's hottest, fastest, and most famous planet, Jansen.

[00:03:19]Jansen, also known by the scientific designation 55 Canankri AE or just 55 Canankri E, is the first planet orbiting Capernicus and is the most wellstied of the system. It's also the most wellknown online due to popular claims that this is a world made of diamonds. This claim comes from Capernicus' high carbon to oxygen ratio. If Capernicus is rich in carbon, then its planets should be as well. Carbon under high heat and pressure forms diamonds, and Jansen is extremely hot and pressurized plates.

[00:03:47]It's even been proposed that up to a third of this planet would be carbon by mass, and a lot of that would be diamond. This was seemingly backed up by the planet's density, but is not actually confirmed. If Jansen is truly a carbon planet, then yeah, it may have more diamonds than the solar system planets, but diamond isn't the only material carbon can form. For example, interiors made of different compounds like silicon carbide and surfaces made of graphite are just as plausible. And these planets would likely have an iron core just like any normal rocky planet would. In short, while it's probably true that Jansen may be more diamond rich than Earth, maybe significantly so, calling it a planet made of diamonds may be a stretch.

[00:04:24]However, so far we've not been able to definitively confirm its composition.

[00:04:28]So, for now, this is all speculation.

[00:04:30]Let's instead talk about what we do know about this planet.

[00:04:34]JSON is roughly 7.99 times more massive than Earth, making it bigger than every rocky object in the solar system combined, or just a little under half the mass of Neptune. Usually planets this large are mini Neptunes and have large hydrogen atmospheres making them like smaller versions of ice giants.

[00:04:51]However, we know that Jansen is not a mini Neptune and is actually a shockingly large rocky planet. This is because Jansen transits its star from our perspective, allowing us to see how much light it blocks when it passes in front of Capernacus and thus how big it is. Jansen is roughly 1.875 times wider than Earth, which combined with its high mass suggest it has a rocky composition.

[00:05:12]One reason Jansen might be rocky instead of a mini Neptune is because it's so close to its star that any atmosphere it did have was pretty much entirely blasted away. This planet takes just 17.6 hours to orbit Capernicus, making its year less than a day long. Because of this, it's extremely hot and is tightly locked to the star with a permanent day and night side. Its temperature has also been directly measured by the Spitzer Space Telescope with a temperature on the day side of 6,330° F or 3,500 Celsius and an upper limit of the temperature on the night side of 2510 F, 1,380 C. This is hot enough for this planet to have a global lava ocean encompassing the day and night sides, even though the light and dark hemispheres of Jansen have a temperature difference of several thousand° in both measurement scales.

[00:06:00]So, we know with high confidence that Jansen is an extremely large rocky lava world with no solid surface because it has a global ocean of lava. For reference, the dayside temperatures are hot enough to vaporize steel. Not melt it, but turn it into gas.

[00:06:15]Which then brings up the question of what Jansen's atmosphere is like. Jansen is so far the only planet in the 55 Canry system where its atmosphere isn't directly observed, but we've had some bad luck pinning down its characteristics.

[00:06:28]In 2016, when the atmosphere was first observed, observations from the Hubble Space Telescope suggested it was composed of hydrogen and helium due to a detection of hydrogen cyanide, but that was already ruled out in 2012 due to Spitzer observations failing to detect any hydrogen escaping the planet, which it would be doing given how hot it is.

[00:06:46]Instead, a 2017 study suggested, strangely enough, that Jansen actually had an atmosphere fairly similar to Earth, composed of nitrogen and possibly oxygen, though obviously much hotter, and an atmospheric pressure similar to Earth's of 1.4 bar. However, as far as I can tell, no other studies have actually confirmed those results, and they're unlikely to be true anyways due to 2024 observations from James Webb suggesting that Jansen actually has an extremely thick atmosphere made of carbon monoxide and dioxide. These results also ruled out the possibility of Jensen having a thin atmosphere made of vaporized rock.

[00:07:18]So to sum it all up, different papers have all found wildly different results for what exactly is in Jensen's atmosphere. But the most recent work by the most advanced telescope suggest it's a thick atmosphere dominated by carbon monoxide and dioxide. If this is true, this atmosphere would have to be sustained by volcanic activity and outgassing from Jansen's lava ocean.

[00:07:36]It's actually kind of what we expect in the atmosphere of a planet that's supposed to be carbon rich. However, given how the study of the Jensenian atmosphere has gone so far, additional observations will probably be needed to confirm this. But speaking of volcanic activity, there's some evidence that Jansen has that as well. A 2016 study found that thermal emissions come from the day side of the planet were varying by a factor of 3.7 over a period of eight transits. And those changes in temperature could be due to volcanic activity. The depth of Jansen's transit across Capernacus, the amount of light it was blocking also varied by transit to transit, which could suggest volcanic activity or a cloud of gas coorbital with the planet. Given the additional evidence for volcanic activity, it seems pretty likely that Jansen is an active world, which may itself also make the thick carbon atmosphere more likely, as there's apparently a mechanism to sustain it. So based on everything we know right now, the most likely scenario seems to be that Jansen is an extremely hot large rocky planet covered in a lava ocean boiling with volcanic activity and outgassing which is sustaining a large thick atmosphere dominated by carbon monoxide and dioxide. However, this may change with additional observations as it has many times in the past and we haven't fully confirmed Jansen's environment yet. That being said, it is so far the most wellstudied planet in the 55 Canankree system. That's not to say the rest of its neighbors are uninteresting. We just know a lot less about them.

[00:08:59]About tenth of an AU away from Jansen, we reach the second of Capernicus' four to six planets, Galileo.

[00:09:06]Galileo is a gas giant at least 85% the mass of Jupiter, taking about 2 weeks to make a full orbit of Capernacus. If Galileo was a transiting planet like Jansen, it would probably be a pretty good one to study. As when a planet transits its star, we can figure out what gases are in its atmosphere based on the light it blocks. However, Galileo's transit, if it's transiting at all, is only doing so partially.

[00:09:27]Basically, when Jansen passes in front of Capernicus, the entire planet passes in front of the star [music] from our perspective. But for Galileo, only part of the planet does, and only sometimes.

[00:09:37]This means that Galileo's transit isn't nearly as helpful for determining its characteristics as Jansen's. The paper that finds the partial transit of Galileo has a false alarm probability of 4.4%, 4% meaning it most likely is a partial transit and not something else like stellar activity. If this is true, then we can find Galileo's orbital inclination and thus its true mass, which is somewhere around 0.85 Jupiter masses. Though it's not fully confirmed because, as far as I can tell, at least Galileo isn't fully 100% confirmed to be transiting Capernicus. This partial transit also isn't enough to constrain its radius. So, we don't know how wide Galileo is. However, the transit we may have is enough to suggest some of its atmospheric composition and it suggests that Galileo has hydrogen in its atmosphere. This is completely expected because Galileo is a gas giant which are made of hydrogen. So, unfortunately doesn't tell us anything about the planet's characteristics. We'll unfortunately have to rely on models based on what we know about other planets to make a guess as to Galileo's characteristics.

[00:10:35]Galileo is a hot Jupiter, though not nearly as hot as most of the other more wellstudied ones. Its exact temperature is unknown, but it is sometimes referred to as a warm Jupiter rather than a full-on hot Jupiter. Whatever its actual temperature is, however, this is still going to be a very hot planet. A lot of hot Jupiters have comet tails as their atmosphere is blasted into space by stellar radiation. And this atmospheric escape has been observed on Galileo, though a rate roughly two to three times slower than most hot Jupiters. So, this planet is evaporating just slower than other planets similar to it.

[00:11:08]Because we don't know what's in its atmosphere other than hydrogen, we don't have any definitive ideas as to what Galileo looks like. However, based on some models, it may have a cloudless appearance and a spectrum dominated by alkali metals like sodium and potassium.

[00:11:21]However, with only a partial transit of the planet being observed, these models aren't confirmed to be applying to Galileo, but it may be a good guess.

[00:11:28]So, Galileo was a warm or hot Jupiter with an atmosphere potentially dominated by alkali metals if some old models about the appearance of extra stellar gas giants is to be believed, evaporating slower than other planets with an atmosphere that contains hydrogen, but we aren't sure what else.

[00:11:43]It's also worth noting that because the two planets get pretty close to one another during their orbits, Galileo will be sometimes a pretty bright and noticeable object in Jansen's night sky.

[00:11:51]Galileo is also the largest confirmed planet in the 55 Canank system, though there are a few caveats to that. That being the masses of the two other planets that aren't fully confirmed with the potential existence of the super Jupiter's Liper Hay and 55 Canank G, which we'll talk about soon. First, we have to talk about the third planet, [music] Bria.

[00:12:10]At face value, it seems that Bria is going to be a smaller, cooler version of Galileo. This planet doesn't transit Capernacus at all, so its radius, temperature, atmospheric composition, and true mass are all unknown. However, we do know Bri's minimum mass, that being at least 0.16 Jupiter masses. We only know the minimum mass because Bri was discovered with radial velocity and its orbital inclination is unknown.

[00:12:33]Radial velocity watches how a star moves as a planet's gravity pulls on it and watches how the star subtly changes color as it moves back and forth from our perspective. However, what angle the planet's orbit is at relative to us will change the radial velocity signal. If the planet is directly in front of the star from our perspective, a smaller planet will be able to produce the same radial velocity signals as a larger planet can on say a perpendicular orbit.

[00:12:57]Because Bria doesn't transit, we don't know its orbital inclination. So, we don't know what mass of a planet is producing the radial velocity signals.

[00:13:05]However, we know that the smallest it can possibly be is roughly 16% the mass of Jupiter, or about half that of Saturn.

[00:13:12]There may be some good reasons to believe that the minimum mass is close to the planet's true mass because Jansen and Galileo's orbital inclinations are both known and they're roughly 85°. If Bria has a similar inclination, it's close to transiting which will put its true mass only slightly larger than the minimum. So, we can be somewhat confident that Bria may be between Neptune and Saturn in mass, but this is not known for certain. As a counter example, the orbital inclination of the disputed planet Lipperhe, which we'll get to soon, is 53°, showing that the 55 Canry planets do have different orbital inclinations from one another. If Bri's inclination was similar to Liper Hayes, its true mass would be closer to 90% the mass of Saturn rather than half.

[00:13:53]Anyways, this planet takes about 44 days to orbit Capernacus, which is close to a 3:1 resonance with Galileo. It was originally thought that Galileo and Bria were in a 3:1 resonance where Galileo completes exactly three orbits every time Bria does one, but this was later ruled out by computer simulations and the two planets are just pretty close to a resonance rather than actually in one.

[00:14:14]This orbit also puts Bria's orbit pretty close to its stars rotation period, which may cast some doubts on its existence. Capernicus takes roughly 43 days to rotate, which is pretty close to this planet's orbital period. Plans have been refuted due to this as stellar activity caused by stellar rotation can be mistaken for planet signals. However, from what I can tell, the detection of Bria is very strong and its similarity to Capernicus' rotation is just a coincidence. So, we can be pretty confident that it exists. At least, I've yet to see anyone try to challenge its existence, so I'll be treating it as confirmed.

[00:14:48]Other than that, there's unfortunately very little we can say about Bria's characteristics. Its orbit is somewhat eccentric and it gets as close to Capernacus as 0.22 AU and as far out as 0.26.

[00:14:59]This will cause temperature variations, but Bria doesn't transit at all. So what its temperature actually is is unknown along with its radius and composition.

[00:15:08]Best we can say for now is that it's likely a warm planet. Basically just a smaller, slightly cooler version of Galileo. Whether it's closer to Neptune or Saturn in characteristics depends on its true mass. And with an unknown orbital inclination, it could really go either way.

[00:15:23]0.78 AU away from the star, a bit over three times further away than Bria, we reach Harriet, my personal favorite planet of the system. Harriet was originally known by the scientific designation 55 Canank F before being given an official name. It was the first exoplanet ever to be given the F designation. 55 Canank was the first system beyond our own to be known to contain at least five planets, and Harriet was the fifth discovered.

[00:15:48]Harriet is about the same distance from Capernicus Venus is from the sun. But since Capernicus is smaller than the sun, this puts Harriet in the habitable zone where temperatures are right for liquid water to exist.

[00:15:59]Harriet also has a nearly perfectly circular orbit, which is something I got wrong in my last Grand Tour 55 Canry video. When the planet was originally discovered, its eccentricity, how far it is orbit strays from a circular orbit, was found to be somewhere between 0 and 0.4, but nobody knew where. So an eccentricity of 0.2 2 plus or minus 0.2 was assumed. However, simulations accounting for interactions with the other planets actually suggest that Harriet's true eccentricity is likely just 0.002, basically a perfect circle.

[00:16:30]Other than that, Harriet is pretty similar to Briot in both its mass and its unknown characteristics. Harriet has a minimum mass of at least 14% the mass of Jupiter, but it may be larger given its unknown orbital inclination. So, we can be confident it's a gas or ice giant. Like Bri, if its orbital inclination is similar to Jansen and Galileo, its true mass might be close to the minimum. But if it's similar to Lipper Hayes, it may approach Saturn mass. Either way, Harriet might be a pretty good example of one of my personal favorite types of planetary environments, a tempered ice giant.

[00:17:01]I've made a video about tempered ice giants before, but it was a while ago and needs an update, so I'll just summarize here. I think tempered ice giants are pretty cool because they may have environments that are decently Earthlike while simultaneously being extremely alien. Neptune and Uranus have surface gravities comparable to Earth, and ice giants like them with warmer temperatures, especially ones in the habitable zone, would likely have water clouds like Earth does. This could result in an environment with Earthlike gravity, temperatures, and atmospheric pressures, while also raining water like it does on Earth on a planet with no solid surface composed mainly of hydrogen.

[00:17:34]This would be a strangely familiar yet entirely alien environment. And I find it super interesting that planets like this could exist and that Harriet might be an example of one. Jansen may be by far the most wellstied 55 canry planet, but Harriet is my personal favorite of the system for the potential it has to have an interesting environment, even though we know basically nothing about it.

[00:17:55]Harriet's equilibrium temperature, which is a temperature estimate ignoring any potential atmospheric effects or other planetary characteristics like albido, basically assuming the planet is a perfectly black sphere, is about -100 to 80° F or73 to 27 C. Though, take those numbers with a grain of salt because again, they ignore any unknown characteristics about Harriet that will change those numbers and I couldn't find a source backing them up and I just took them from Wikipedia. So, they may not be entirely reliable. However, it may be a decent guess in determining the possible range of Harriet's temperatures, and the warmer end is particularly interesting.

[00:18:31]Harriet being much further away from Capernacus than the three inner planets will also have a much greater opportunity of hosting large moons. So far, no moon's been found in 55 Cananker or anywhere outside the solar system for that matter. But the further away a planet is from its star, the better a chance it has of hosting large moons for two reasons. One is the stars farther away, increasing the area around a planet where moons would have stable orbits. And second, that larger distance also increases the area around a planet where moons could even form in the first place. Unfortunately, there's no way to estimate how likely large moons around Harriet are, but it will likely be more likely than places like Galileo and Bria, which is another reason why Harriet is, in my opinion, the most interesting 55 Canankree planet, even though we know a lot less about it than Jansen.

[00:19:16]After Harriy in the 55 Canry system, there's a large gap without any planets until we get to Liber. This gap is similar to the distance between Venus and Jupiter except with nothing confirmed existing here. This could allow for the existence of potential unseen planets and maybe even rocky Earth-sized ones. However, so far nothing has been confirmed in the Trans Harriet but sis liph space. But there is one potential object worth talking about. 55 Canank G.

[00:19:42]55 Canankree G is a candidate planet orbiting beyond Harriet that was found very recently in 2025. Because of this, it hasn't received an official name yet.

[00:19:51]That and it's completely unconfirmed and we know almost nothing about it. The paper that may have discovered it only has a potential range of orbits and masses this candidate planet may have.

[00:20:00]That being less massive than Liph and orbiting at a similar distance or closer in distance. Its minimum mass might be around 0.9 Jupiter masses, but how far away it is from the star is unknown, so that number could easily change. We do however know this candidate's orbital period, roughly 3,830 days or about 10 1/2 years. The reason we don't know its distance from the star despite knowing its orbital period, if it exists at all, is because its orbital eccentricity is unknown. There are also some reasons to doubt this planet exists, mainly because the author of the paper finding the signal say it's likely due to magnetic cycles of capernicus rather than a new planet. But they also say that more data will be needed to determine the best solution.

[00:20:40]So unfortunately that's all we can say about the unconfirmed and hypothetical 55 can G for now. It may be between Harriet and Liber and maybe a pretty large gas giant, but also may just be stellar activity mistaken for a planet signal and we know nothing else.

[00:20:55]But with that out of the way, we finally get to talk about Capernacus's last planet before we get to the second star, Liperehi.

[00:21:02]Liph is a planet about 5.4 AU away from Capernicus, similar to distance Jupiter is from the sun, that was considered to be confirmed planet for several years before a new analysis of the system called its existence into question. Liph was detected with radio velocity like Jansen, Galileo, O'Brien, and Harriet.

[00:21:19]But a reanalysis of the radio velocity data when accounting for stellar activity only detected the first four planets without the need for lip hay. To be clear, this doesn't mean that lip hay wasn't detected, but it does mean that the 55 can system data is consistent and both works with and without the existence of liber. The simplest explanation is usually the most likely and a four planet system is simpler than five, calling lip's existence into question. A second paper also looked for planet signals in 55 Canankree and didn't detect liber at all, but they call their observations an apparent false negative, meaning it's a possibility that some kind of instrumentation error is to blame rather than the planet not existing.

[00:22:00]So there are two separate lines of evidence casting doubts on Liberai's existence, but neither, even when put together, are convincing enough to fully rule it out. More observations, specifically the ones that'll be coming from the Gaia Space Telescope in December 2026, will be needed to finally put to rest the question of Liper Haye's existence. We'll have our answer in a few months from the time of making this video. But for now, I'm going to treat this planet as if it exists so we can talk about its characteristics. But just be aware that it may not. And by December of this year, this video may become outdated.

[00:22:31]Liph, if it exists, is the largest planet of the 55 can system with a minimum mass of at least 3.8 8 Jupiter masses, making it by far the most massive planet of the system, and in fact more massive than the minimum masses of all the other planets combined. Its true mass may be even larger than this, as Hubble observations of the system suggest, though don't confirm that Liberace orbital inclination is about 53°, which would make its true mass 4.8 Jupiter masses.

[00:22:58]However, this is also dependent on Liberace orbital period, and that number has been changing as new data has been found. Estimates for Liberace's orbital period have ranged from about 13.1 years up to 14 and its orbital distance between 5.4 and 5.77 AU. We're fairly confident its orbit is circular.

[00:23:16]However, because Liper, if it exists, is such a large planet, it may have a lot of internal heat like a smaller version of a brown dwarf. This internal heat may be enough to drive temperatures on the planet up high enough to allow for the existence of water clouds. But again, this is not confirmed as Liphe's radius, true mass, temperature, composition, and existence are all unknown. However, we can guess that its radius is similar to Jupiter's as gas giants of similar mass to Liph with confirmed radi are. This means it'll also have a very high surface gravity. So, despite potentially having water clouds, won't have nearly as earthlike of an environment as Harriet.

[00:23:53]But with Liber's existence unconfirmed, this is all we can say about it for now.

[00:23:57]These are the six planets of varying degrees of confidence in their existence of Capernicus, the first star of 55 Canank. But there's a whole other star to talk about.

[00:24:07]55 Canank B is a small red dwarf several hundred AU away from Capernacus, first discovered in 1918. How long it takes to orbit Capernicus exactly is unknown, as is the exact distance the two stars are from one another, but we do know they're very far apart. Anyways, 55 Canank B was not given an official name as in 2015, we didn't know there were any planets around it. But in 2025, two small planets were discovered orbiting this star, the smallest planets of the whole 55 Canankree system. The star is about 26% the mass and radius of the sun and is circled by two planets named 55 Canank BB and 55 Canankree BC. Both planets were discovered extremely recently, so we know basically nothing about them yet, but there are still a few interesting things we can say.

[00:24:53]55 Canankree BB, the first planet of the second star, is the smallest planet of the entire 55 Canank system with a minimum mass just 3.5 times the mass of Earth, less than half that of Jensen, though still more massive than every planet in the inner solar system combined. It takes just 6.8 days to orbit 55 Canank B at just 0.04 AU, which is only slightly further away from its star than Jansen orbits Capernicus.

[00:25:19]However, because 55 Canank B is just 0.00 008 times as bright as the sun. 55 Canary B isn't that hot. It only receives about 2.6 times the light Earth does. Given an estimated equilibrium temperature, which again ignores any potential atmospheric effects, between 134 and 206° F, 57 to 97 C, which is very hot, but actually below the boiling point of water. But again, the actual temperature may be much higher due to any unseen atmospheric effects 55 can BB may have. 3.5 Earth masses is also only a minimum. So, this is the first planet of the whole 55 Canary system where we actually don't know if it's rocky or not. As 3.5 Earth masses could really go either way, and the chances of it being a mini Neptune increases depending on its true mass. Unfortunately, without even knowing if it has a solid surface or not, we can't say anything else about the characteristics of 55 Kry BB except that it's probably tidily locked to its star.

[00:26:17]55 Canankree BC is then the last planet we'll cover in this video. Its minimum mass is at least 5.3 Earths and it takes 33.7 days to orbit 55 Canankree B. This actually puts it on the outer edge of its stars habitable zone which is very interesting. This makes 55 Canank the first ever binary star system where both stars are known to host planets in their respective habitable zones. Capernicus has Harriet and 55 Canankree B has 55 Canank BC. planet only receives about 30% the light Earth does, making it a very cold mini Neptune. I'm more confident BC is a mini Neptune due to its higher minimum mass, but again that's completely unconfirmed. Its equilibrium temperature is between 1117 and81 FF83 to -63 C, which is definitely very cold, but potentially conducive to water if its atmosphere traps heat effectively. There's a lot of speculation for the environments of these two planets we could do. But unfortunately, this video is already running fairly long and I don't have time to fully cover it, and it may have to be the subject for another video. But like Harriet, I'm pretty excited about these two planets due to their low temperatures and low masses, which could make for some fairly interesting environments. These plants were discovered only about a year ago, so hopefully we'll be able to find out more about them soon, though neither of them transit 55 Cananker B from our perspective.

[00:27:36]But with that, that's where we'll end this tour of the 55 Canankree system.

[00:27:39]Its eight planets have an extremely wide range of environments from an ultra hot lava world, warm Jupiter, warm ice giant, tempered ice giant, disputed super Jupiter, and two warm and cool sub Neptunes, respectively. And a weird unconfirmed cold gas giant that may just be stellar activity. The system pretty clearly has a lot to offer, and hopefully one day all these plants can be as wellstied as Jansen, because there's definitely a lot to discover here and a lot of exciting worlds. There will definitely be more discoveries to come from Jansen and maybe the rest of its family of worlds soon, and I'll be sure to cover that when it happens.

[00:28:12]Thank you for watching. If you enjoyed, check out the rest of my Grand Tour series.