#askethan — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #askethan, aggregated by home.social.
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Can quantum entanglement survive a black hole? #AskEthan When one member of an entangled pair of particles falls into the black hole, is the entanglement broken? And if not, is there any way to test and confirm its persistence? bigthink.com/starts-with-... #space #astro #physics #quantum
Ask Ethan: Can quantum entangl... -
Will anything persist when the Universe dies? #AskEthan The last star will burn out, the last black hole will decay, and entropy will reach its maximum: a heat death. After all that, can any trace of our existence still persist? bigthink.com/starts-with-... #space #cosmology #fate #astro
Ask Ethan: Will anything persi... -
Can we see the expanding Universe changing? #AskEthan We've measured the expanding Universe by looking at many objects at different distances and with different redshifts. Here's how we'll measure it directly: with just one object over time. bigthink.com/starts-with-... #space #astro #redshift
Ask Ethan: Can we see the expa... -
Can we see the expanding Universe changing? #AskEthan We've measured the expanding Universe by looking at many objects at different distances and with different redshifts. Here's how we'll measure it directly: with just one object over time. bigthink.com/starts-with-... #space #astro #redshift
Ask Ethan: Can we see the expa... -
Can we see the expanding Universe changing? #AskEthan We've measured the expanding Universe by looking at many objects at different distances and with different redshifts. Here's how we'll measure it directly: with just one object over time. bigthink.com/starts-with-... #space #astro #redshift
Ask Ethan: Can we see the expa... -
Can we see the expanding Universe changing? #AskEthan We've measured the expanding Universe by looking at many objects at different distances and with different redshifts. Here's how we'll measure it directly: with just one object over time. bigthink.com/starts-with-... #space #astro #redshift
Ask Ethan: Can we see the expa... -
Can we see the expanding Universe changing? #AskEthan We've measured the expanding Universe by looking at many objects at different distances and with different redshifts. Here's how we'll measure it directly: with just one object over time. bigthink.com/starts-with-... #space #astro #redshift
Ask Ethan: Can we see the expa... -
How long can the longest-lived star shine? #AskEthan It's been 13.8 billion years since the Big Bang, but the longest-lived stars will shine for many trillions of years. How long do we have before the last survivor goes out? bigthink.com/starts-with-... #space #astro #stars #future
Ask Ethan: How long can the lo... -
How much damage could a cosmic ray do to a human? #AskEthan Cosmic rays come in all varieties of energy and speed, with the most energetic ones outstripping even LHC protons by a factor of millions. What would happen if one hit you? bigthink.com/starts-with-... #space #astro #physics #particle
Ask Ethan: How much damage cou... -
Where are all the blueshifted galaxies? #AskEthan The Universe is expanding, sure. Nearby, many galaxies are blueshifted, far away, few are, and beyond a certain distances, none are. What does this imply, and how do we know? bigthink.com/starts-with-... #space #astrophysics #astro #expanding
Ask Ethan: Where are all the b... -
Where are all the blueshifted galaxies? #AskEthan The Universe is expanding, sure. Nearby, many galaxies are blueshifted, far away, few are, and beyond a certain distances, none are. What does this imply, and how do we know? bigthink.com/starts-with-... #space #astrophysics #astro #expanding
Ask Ethan: Where are all the b... -
Why do gravitational lenses make crosses, not rings? #AskEthan When an observer, foreground mass, and a background light source all align, you get a gravitational lens. You might expect Einstein rings, but more often you get crosses. Here's why. bigthink.com/starts-with-... #space #astro
Ask Ethan: Why do gravitationa... -
What does “gravitationally bound” mean in the expanding Universe? #AskEthan Does the fabric of space expand, within the expanding Universe, in the location where you are? It depends on if you're inside a bound structure or not. Here's what that means. bigthink.com/starts-with-... #space #astro
Ask Ethan: What does "gravitat... -
Why is there no such thing as antigravity? #AskEthan In our Universe, everything that we know of experiences the influence of gravity. But if there are antiparticles, why isn't there any antigravity? bigthink.com/starts-with-... #space #gravity #physics #astro
Ask Ethan: Why is there no suc... -
Why does something exist instead of nothing? #AskEthan We all know that the fact that the Universe exists has made a lot of people angry since the dawn of people. But how did our Universe come to have "something" instead of nothing? bigthink.com/starts-with-... #space #quantum #physics #reality
Ask Ethan: Why does something ... -
Can stars form within the expanding Universe? #AskEthan The Universe, since the Big Bang, expands, cools, and gets less dense. How is it possible for gravity to form stars in such a dilute environment? bigthink.com/starts-with-... #space #astronomy #stars #cosmology
Ask Ethan: Can stars form with... -
How do LLMs/chatbots impact students and cheating? #AskEthan Across all educational levels, students are outsourcing their assignments to LLMs like ChatGPT. Except for the ones who care about growing their own minds, they're unlikely to stop. bigthink.com/starts-with-... #astro #physics #ed
Ask Ethan: How do LLMs/chatbot... -
Can we ever observe a proton decaying? #AskEthan As far as we experimentally know, the proton is a truly stable particle. But theoretically, there are many motivations to search for proton decay. Will we ever observe one in action? bigthink.com/starts-with-... #physics #astro #particle #matter
Ask Ethan: Can we ever observe... -
What’s the point of exploring the Universe? #AskEthan With so much going on in the world and so many problems to solve, why should we be investing in exploring the Universe? We must always remember. bigthink.com/starts-with-... #space #astro #physics
Ask Ethan: What's the point of... -
Is there really a “dark side” of the Moon? #AskEthan The phrase "dark side of the Moon" used to refer to the Moon's unseen, away-facing side: the far side. But there is a "dark side" after all, just not where you'd expect. bigthink.com/starts-with-... #space #astro #moon
Ask Ethan: Is there really a "... -
How can we better measure G, the gravitational constant? #AskEthan The universal gravitational constant, G, is one of the oldest fundamental constant of all, and yet, one of the least well-measured. Can measuring it from space help? bigthink.com/starts-with-... #space #physics #astro
Ask Ethan: How can we better m... -
Was the Universe “timeless” before the Big Bang? #AskEthan Even Stephen Hawking said there was no such thing as time before the Big Bang. But his reasoning was fatally flawed. Even today, it remains a great unsolved puzzle. bigthink.com/starts-with-... #physics #astronomy #space #Hawking
Ask Ethan: Was the Universe "t...