Yes, I have personally witnessed ufos and aliens up close (most when I was 14), its not so suprising that life exists in so many wonderous varieties when everything is under the direction of the Supreme Personality of Godhead.
http://www.SrimadBhagavatam.org has some listings for various entities that travel by tantra and yantra what to speak of yogis and those who perfect mantra (easy journey to other planets book)remote viewing and astral projection. choose your vehicle, a tin can, flying saucer or meditation.
A classic example of remote viewing is Sanjaya telling the king of the Kuru dynasty what is taking place on the battlefield of Kuruksetra almost 6000 years ago.
Also interesting in the vedic texts which were written thousands of years ago and yet still known from the beginning of creation .... you can find the exact calculation of how long it takes for light to travel from the Sun to Earth. The life expectancy is also to be found for the universe as well as how large this one universe is out of innumerable universes and how God recycles them... aka annialates, maintains, and creates