An alien invasion by secular and militaristic extraterrestrials would solve one of the biggest problems we have here on Earth. That problem being: does life exist on other planets? Finally we would have an answer!
Planets that formed over 10 billion years ago are about 5 billion light years from us, meaning that if we could somehow study planets that far away (we can’t) the light reaching us from there would have taken 5 billion years to reach us. Therefore, we’d be seeing what the planet looked like 5 billion... Continue Reading →
Proxima Centauri, is our nearest star, about 4 light years away. A light year is the distance light travels in one year, or 9,460,730,472,581 kilometers. That's 9.46 trillion kilometers, or about 5.88 trillion miles. The fastest space ship we ever built was the Juno spacecraft, which in 2016 broke all speed records in space with a... Continue Reading →
In answering "If aliens really exist, why don't they visit Earth? Do they fear humans?", at least we agree. They aren’t visiting. But why not? I suggest because they are in a galaxy far, far away and light speed is just plain pokey. Even though we want to go faster than light (FSL) for making... Continue Reading →
Faster than light speed will never be possible, ever. The best you’ll be able to do is maybe 1/10th the speed of light given an enormous amount of propellant, and then you’ll have to slow down at the end of the trip using just as much fuel as it took you to go that fast in the... Continue Reading →
Great question, and you see, that’s what we mean when we say everything is relative. Your “speed” is always relative to something else. If you don’t compare it to something else, you might as well be standing still. Relative to you, the other spaceship is standing still. You are both just floating there while Earth quickly moves... Continue Reading →
The tennis ball will not appear in every location of it’s trajectory nor will it skip some on it’s way. It will look to us that time on the tennis ball has slowed down. Time and space are relative. What this means to your question is simply the speed of the tennis ball must be... Continue Reading →
I'm just wondering for practical purposes. Doesn't even have to be a manned mission, so all that extra life support weight can be dumped. Using optimal fuel mixtures, the latest technology, & as many gravity slings & other natural phenomena as possible how fast could we go? According to Wikipedia: New Horizons is currently making... Continue Reading →
Does “now” travel at the speed of light or is it instant? If now travels at the speed of light, then does a supernova happen now, or a long time ago?