As Nasa scientists announce the discovery of a new solar system that has at least three Earth-like planets - is this newly discovered solar system proof we're not alone? <br /> <br /> <br />For centuries it has been one of the most vexing mysteries for mankind: are we, the seven billion inhabitants of this wondrous blue planet really alone, or is there life somewhere out there in the universe? <br />Yesterday, we came a step closer to answering that tantalising question with the landmark announcement by Nasa scientists of the discovery of a new solar system that has at least three Earth-like planets — with climates that just might support life. <br />The kind of planets that a certain ET might have called home. <br />The discovery by an international team using advanced telescopes in space and at far-flung locations around the world has caused a frenzy of excitement among astronomers who, as a breed, are not given to hyperbole. <br /> <br /> <br />Read more: http://www.dailymail.co.uk/sciencetech/article-4250922/Nasa-scientists-announce-discovery-new-solar-system.html#ixzz4Zd3vvcS5 <br />Follow us: @MailOnline on Twitter | DailyMail on Facebook