Relative and absolute dating for kids
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co.
Physicist: One of the most profound insights ever made by peoplekind is that time is relative. The existentially terrifying answer is: there is no such thing as a “correct clock”.
In ordinary geometry, the shortest distance between two points is a straight line.
In spacetime geometry, the time between two points is a straight line.
He did such a good job that the event horizon of a black hole, the boundary beyond which nothing escapes, is known in fancy science circles as the “schwarzschild radius”.
No one is entirely sure how much of the matter in the universe is presently tied up in black holes, but it’s generally assumed to be a small fraction of the total.
Long story short: when someone says that the universe is 13.8 billion years old, they’re talking about the age of the matter in the universe, almost all of which is effectively the same age.
It is not rare to see a younger guy and an older woman date and have a very intense sexual and romantic relationship, which defies the traditional “older man, younger woman” set-up that we are used to seeing. First, the fact that such a dating situation is still somewhat taboo makes is all the more enticing and exciting.
The escape velocity from the surface of the Earth is 11km/s, which yields a gamma of .
Being really close to 1 means that the passage of time far from Earth vs.