Thursday, July 25, 2019
Tuesday, July 23, 2019
Sunday, July 21, 2019
Friday, July 12, 2019
Where are all the aliens?
https://www.youtube.com/watch?v=qaIghx4QRN4
I don't agree. We have one example of a planet capable of supporting life and there is life on it. It is my thinking that we will have life throughout the galaxy.
Wednesday, July 10, 2019
Friday, July 5, 2019
Why I believe in UFOs, and you should too... | Ben Mezrich | TEDxBeaconStreet
I'm extremely skeptical. There is a real lack of evidence.
The distances between stars are so vast that the energy requirements for interstellar travel are by our standards almost infinite. The cost of the moon program in modern dollars was around a hundred billion dollars. Sending little robots to Mars costs several billion dollars. Any kind of interstellar program would cost at least a trillion dollars. It is not about money. It is about resources required, either by us or by another civilization, which are enormous.
There are also practical considerations. Space is very radioactive making it impractical for travel. It takes a great deal of effort to keep humans alive in space. Also, anything moving faster than 1% the speed of light is in danger of being obliterated by a grain of sand that happens to be in the way. At 10% the speed of light, the super thin interstellar gasses, although almost non-existent, are enough to create considerable resistance. I have heard that it would difficult to go any faster than this.
For this reason, if I were designing an interstellar craft, I would make it shaped like a giant needle with it being very thin. I don't know if this is practical.
Sunday, June 30, 2019
Saturday, June 29, 2019
Tuesday, June 25, 2019
Sunday, June 23, 2019
Wednesday, June 19, 2019
If the universe is only 14 billion years old, how can it be 92 billion light years wide?
There was a time when parts of the universe were moving away from other parts of the universe faster than the speed of light. That time is right now. The point is space itself is expanding everywhere at a very rapid rate. It was even more in the very early universe, during a period called super inflation. Then it settled down to something reasonable, but because of Dark Energy, the expansion will become greater over time.
This video explains and clarifies what we mean by the visible universe and the microwave background radiation. However, it takes some effort to understand it.
https://www.youtube.com/watch?v=vIJTwYOZrGU
This video explains and clarifies what we mean by the visible universe and the microwave background radiation. However, it takes some effort to understand it.
https://www.youtube.com/watch?v=vIJTwYOZrGU
Monday, June 17, 2019
Sunday, June 16, 2019
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