Though modern astronomers and astro-phycisists like Stephen Hawking have their doubts about interstellar travel there are countless references to inter-dimesional travel in mostly ancient Indian texts: The 'Kandha Puranam' (nearlly 17 million years ago)mentions that the Asura (Titan) King 'Sooran' ruled over 1008 universes and had 'vimanas' or flying crafts that could in an instant travel all over space cutting across dimensions at tremendous speed,that could hover in mid-air,over water,disappear and re-appear all of a sudden and had a host of stealth-weapons,even 'nuclear-winter' is mentioned for it is said that the entire world was enveloped in darkness caused by Sooran during the war; Lord Muruga possessed the 'Peacock Craft' that could circumvent the '14 worlds' and fly beyond in a micro-second and his "missile with the lengthy flame"(nedunchudar Vel) was 'voice-activated' and re-useable and was so powerful that it blew up into smitherns the 'Kraunja' mountain which even our modern day nuclear weapons cannot do according to scientists; The Ramayana(1.7 million years ago) mentions that Emperor Ravana's 'Pushpaka vimana' which he captured from 'Kubera' the Lord of riches in heaven could host "as many passengers as it takes",there were stun-weapons and stealth-technology; In the Mahabharata war(3500 b.c.) nuclear weapons like the 'brahmastra' were used and there is mention of numerous flying crafts of the Lords (Angels) of Asuras (Titans) and Rakshasas (Demons) who all travelled to and fro from the upper and lower worlds; The 'Sri Linga Purana' mentions that Lord Brahma's 'Swan Craft' flew and transcended the seven upper worlds while Lord Vishnu's 'Boar Craft' 'tunnelled' though the seven lower worlds and went even beyond 'Baathala' the lowest plane which all reminds us of blackholes being portals and shortcuts to parallell universes which is being theoretically proved today!; More than 2500 years ago the Japanese Royal Family's ancestors met with the 'Sun God' who landed on Mount Fuji and were presented with a sword and an orb which are still in the Imperial Palace in Japan; The native Indian's forefathers living on 'sun Island' on lake Titicaca in South America were visited by the Sun God; The Dogon tribes of Mali have a tradition that their forefathers had sailed on a great ship that flew down form Sirius the star,but what is interesting is that they don spacesuit-like gear and celebrate their home-coming once every fifty two years which is when sirius comes in direct alignment with our world!