Click through for full sized version and the red button caption. via Saturday Morning Breakfast Cereal. Sometimes, learning science means discovering the constraints reality puts on us, and that part isn't always fun.
The radius of the observable universe is often stated to be 46 billion light years. From a certain point of view, this is true, but I think it's a bit of a misleading statement. Occasionally you also see people say that the observable universe is 13.8 billion light years in radius, which is also true, from … Continue reading The size of the observable universe is complicated.
What if we could send humans anywhere at the speed of light, and at a rock-bottom price? That's eminently feasible if we send the information and not the protoplasm. No crew, just code. Consider: The human genome consists of about 3.3 billion base pairs. Since there are only four types of pair, that amounts to … Continue reading When Will We Build the Starship Enterprise? | Seth Shostak
I'm a big fan of Star Wars, Star Trek, and the space opera genre. The future I would most hope for the human race would be for us to spread out among the stars and become an interstellar species. Now, assuming we don't drive ourselves extinct, I do think we will eventually become an interstellar … Continue reading Why FTL travel is unlikely, at least in the foreseeable future