Alpha Centauri Bb.
So can’t we put aside the convention for real exoplanets and come up with some more befitting than Bb for what is and always will be the closest world beyond our solar system? But Pandora sounds much better. Alpha Centauri Bb was originally found some 4.37 light years away from the Earth, circling the main sequence star, Alpha Centauri B, once every 3.24 days—an extraordinarily fast orbit.
Credit: ESO/L.
It gives a quick overview of the hierarchical architecture. The following plot shows the approximate sizes of the planets in this system
Note that if no green band is shown in the plot, then the planet's orbit is far outside the habitable zone. The following plot shows the approximate location of the planets in this system with respect to the habitable zone (green) and the size of the star (red). The planet candidate Alpha Centauri Bb was announced as the nearest exoplanet to Earth and also the lightest exoplanet ever discovered around a Sun-like star.
Having long fantasised about our neighbour, it will be disappointing if when we eventually manage to pop over it turns out there is no-one in, and never had been. Our own Sun is visible to the upper right.
The Solar System planets are shown as a comparison.
Hence the closest planet to our solar system being Alpha Centauri Bb.
Whilst ruling out the existence of Alpha Centauri Bb, a possible transit of a separate exoplanet in 2013 was observed.
Researchers from the University of Oxford, however, recently made a shocking discovery: Alpha Centauri Bb was just an illusion. This is only an estimate, using the star's spectral type and mass. Alpha Centauri is one of the brightest stars in the southern sky (in fact, it is a triple system). Down the decades we’ve had the natives of Alpha Centauri envisaged as pygmy elephants with multiple trunks (Were Pandora real, that would technically make it Alpha Centauri Ab or Ac or whatever depending on what else was round the same star and the order they were detected in. More references to the scientific publications and comments can be found in the commit messages. Is that the Bbest you can come up with?
Science fiction has long known what science only recently confirmed: that at a mere 4.4 light years away, Alpha Centauri isn’t just our nearest neighbouring star system, it The nifty bit of interstellar detective work that confirmed its existence was announced late last month, but ever since something has been bothering me.Really?
Hence the closest planet to our solar system being Alpha Centauri Bb. This list shows all planetary and stellar components in the system. Note that unless the radius has been determined through a transit observation, this is only an approximation (see Lissauer et al. The tiny signal of the planet was found with the HARPS spectrograph on the 3.6-metre telescope at ESO's La Silla Observatory in Chile. Close to 100 star systems with more than one world have now been discovered (with many more awaiting confirmation), so it is far from impossible that Alpha Centauri could harbour other planets, perhaps even in the “If such a world exists, that will only make the science fiction seem even more prophetic... although I wouldn’t hold out too much hope when it comes to the details. But what if it isn’t all on its own? The closest star system to the Earth is the famous Alpha Centauri group.
This artist's impression shows the planet orbiting the star Alpha Centauri B, a member of the triple star system that is the closest to Earth. If you spot an error or if you can contribute additional data to this entry, please send an e-mail to an open source database of all discovered extrasolar planets
This NASA/ESA Hubble Space Telescope has given us this stunning view of the bright Alpha Centauri A (on the left) and Alpha Centauri B (on the right), shining like huge cosmic headlamps in the dark. But that’s a line from the very first episode of “Close orbit”: that’s the only negative in all this. This table lists all people who have contributed to the Open Exoplanet Catalogue.
To see these, head over the github or Please consider contributing!
It just seems so Bboring and such a shame given the rich range of names people have already dreamed up for planets in the Alpha Centauri system.
Alpha Centauri B is the most brilliant object in the sky and the other dazzling object is Alpha Centauri A. There’s Rann, the adopted homeworld of So why Bb, when there are so many better, more evocative alternatives?
If others are discovered round the same star they will be called Bc, Bd and so on.It’s tempting to describe the process of spotting these planets as “reaching out into other worlds from our desperately overcrowded planet, a series of deep-thrust telescopic probes conclusively established a planet orbiting the star Alpha Centauri as the only one within range of our technology able to furnish ideal conditions for human existence”.
If …
Well, it turns out that the official designation of the new planet is not due to a lack of imagination or knowledge of science fiction, it’s just that there are rules for these things. This table lists all links which are relevant to this particular system.
Alpha Centauri is the nearest star system to the Sun, located at a distance of only 4.37 light years or 1.34 parsecs from Earth.
The equations of 2011b).
The new planet was detected around Alpha Centauri B, and exoplanets are given a lower case letter starting with b. Note that this is just a summary.
It is the brightest star in … Bb appears to be even nearer to its sun than Mercury is to ours, making it highly unlikely anything could survive.
Alpha Centauri is our nearest star neighbor, and is a mere 4.37 light years from the Sun. In 2012, a planet around Alpha Centauri B was announced, Alpha Centauri Bb, but in 2015 a new analysis concluded that it almost certainly does not exist and was just a spurious artefact of the data analysis.
The planetary system Alpha Centauri hosts at least 5 planets.
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