rove up , roll up , it ’s time for a young major planet announcement . Today , we look at the rattling world of EPIC 247589423 b , which may offer us a glimpse at what Earth looked like billion of years ago .
The satellite was one of three establish by noticing the fall in luminance as they passed in front of their legion star , known as the transit method acting . Thisdiscovery , reconcile to the journal of the American Astronomical Society , was run by Andrew Mann from the University of Texas at Austin .
This planet is found in the Hyades clump and is thought to be about 195 light - years from Earth . The asterisk it orbits is a late K dwarf , which is slightly dimmer than our Sun , and just 800 million year old .
Most enticingly though , it is estimate to be 0.99 times the radius of Earth . This makes it one of the few Earth - sized planets with a known untried age . The two other planets ( c and d ) are larger , with r of 2.91 and 1.45 Earth , a mini - Neptune and tiptop - Earth severally . They are predicted to orbit the star in 7.9 ( the ground - sized planet ) , 17.3 , and 25.6 day .
“ This is basically the first young Earth - sizing planet with a well - determined long time , ” Mann told IFLScience , mention the paper had yet to be peer - review so the determination was not technically confirmed yet . “ So it is surely our effective gibe for list about the history of Earth as it stands . ”
In their composition , the team mark this find offers “ the possibility of consider the history and evolution of Earth - sized major planet . ” The proximity of the planet to the ace ( give its inadequate orbital period ) reasonably much rules out habitability , but it could tell us more about how Earth - sized worlds form and take anatomy .
The brightness of the wiz also makes this system a quality object for survey - up radial velocity measure , which could work out the masses of the planets and tell us more about them . The relatively small size of the star also means it should be potential to mensurate the atmosphere of the major planet .
The most crucial thing , though , is the eld of the man . At the moment , they note there is only one land - sized planet that could be young , Kepler-78 , which we do n’t yet know the geezerhood of . The EPIC 247589423 system offer a tantalizing coup d’oeil into our past regardless .
After 800 million years , we think our planet may already have started toform life . That ’s unconvincing the case for EPIC 247589423 group B , but who knows what secrets it might hold up .
