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Ask Ethan: Why don’t we feel the Universe’s expansion accelerating?
Ask Ethan: Why don’t we feel the Universe’s expansion accelerating?
The Universe isn’t just expansion, but the expansion itself is accelerating. So why can’t we feel it in any measurable way?
Ethan Siegel
Aug 30
What is the origin of quantum uncertainty?
What is the origin of quantum uncertainty?
No matter how good our measurement devices get, certain quantum properties always possess an inherent uncertainty. Can we figure out why?
Ethan Siegel
Aug 29
Why haven’t we detected a signal from intelligent aliens yet?
Why haven’t we detected a signal from intelligent aliens yet?
Life arose on Earth early on, eventually giving rise to us: intelligent and technologically advanced. “First contact” still remains…
Ethan Siegel
Aug 28
How far away are we from the location of the Big Bang?
How far away are we from the location of the Big Bang?
If you think of the Big Bang as an explosion, we can trace it back to a single point-of-origin. But what if it happened everywhere at once?
Ethan Siegel
Aug 27
Why do we count the Universe’s age from 13.8 billion years ago?
Why do we count the Universe’s age from 13.8 billion years ago?
The Universe is 13.8 billion years old, going back to the hot Big Bang. But was that truly the beginning, and is that truly its age?
Ethan Siegel
Aug 26
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