Neil deGrasse Tyson Answers Science Questions From Twitter | Tech Support | WIRED

So I'm Neil deGrasse Tyson, your personal astrophysicist, and I was invited with these fun props, like inflated planets, to answer your

questions

about the universe, so bring them to the Internet Questions. I got one here from Cain Jackson, how many stars are born? per year, how many died? Well, it's about a hundred per year in our galaxy, we've had a stable amount for the last few billion years and where it's calculated, we have about a hundred billion stars in the galaxies and universes, about ten. billion years, about a hundred a year, maybe ten and a hundred a year, so you got it next from the Maccabees, love

questions

that start with friend, there's literally a quark called strangeness because no one knows what the hell he's doing. , but what is happening.

Damn, I hate physics, that's not a question, we have quarks named from top to bottom, down, up, strange and haunted, we don't see them directly, we can't tell you what, we can't show you a picture of them, so they are just placeholders. words for them, so just get used to it that all quantum physics transcends our personal life experience, so to describe it we have to make up words, one of them is just strange, that doesn't mean we can't describe it and know it. what it is, how it behaves on itself and with other quarks, so don't give too much meaning to the word itself, it's the idea that matters after Jordan, is it just a coincidence the two big hurricanes, a forest fire that spreads and now an earthquake of magnitude 8.4?

I followed the solar eclipse yes by the way there are solar eclipses every 18 months or so find something happening there and you want to blame it on the eclipse ok go ahead people did that for millennia no what do we have here a dagger for the afternoon. If dark energy makes the universe expand, it could create more or more space, can we use that space to produce dark energy? um I don't know, by the way, dark energy is not making us expand, we were already expanding. The expansion of the universe is accelerating, that's what is happening.

The evidence shows that dark energy is not being created in the expansion of the universe, so I think the answer to this is no, but if we could one day control dark energy in a laboratory, perhaps we could discover interesting properties. in its relation to dark matter I don't know how to determine it watch this space below on Twitter charles william johnson if the Higgs boson etc. forms an essential part of reality, which is why it can't be found in our living room or Around us there are certain parts of our fundamental reality that you only have access to under certain conditions of pressure, temperature and energy.

You don't experience a proton in your life, but it is a fundamental part of the nuclei that make up the atoms that make up your life. body, just because you don't see it, feel it, touch it, taste it or smell it, doesn't mean it doesn't exist and part of the purpose of why we have

science

, particularly the methods and tools of

science

, is to decode what is. certain about nature that otherwise transcends your sensory perceptions, that is science. You wouldn't need the tools if our brain sensory system accurately decoded the world around us, but it doesn't and that's why science tries to find any way to do it. we can remove your brain i.e.

R, nose, mouth, touch from the operation and the more we can do it successfully the less bias will appear in the result just take out the human being so yes reality is not what you perceive , but what the methods and tools of science reveal next Wow, the entire universe is a musical I don't know if I love musicals if it is, I'm ashamed I haven't heard of it, but it should be, it seems to me the universe would really be Well, next, Marilyn Baker, what is a quantum particle? What is, for example, a quark like? Where is an electron?

What quantum physics is, the study of everything that matters on that scale. physics, this is how small particles move in this world. I hope that

answers

your question within these hundreds of newly confirmed exoplanets, how many are possibly habitable based on the actual scientific method that we have, so look for exoplanets, planets that orbit other stars, a fraction of them are in the Goldilocks zone. too close if it had liquid water it would evaporate not too far away they haven't had liquid water it would freeze now you can calculate what it is for any star and then there is a subset of all the thousands of exoplanets, there are a few hundred that orbit in the Ricitos zone of Gold life as we know it could thrive there no life has been found yet looking for life but it could thrive there by the way there are other sources of heat tidal heat sources that are created from the main planet Jupiter for example. on its moons, so there are moons of Jupiter in Jupiter's path outside the Goldilocks zone, Jupiter's moons are kept warm by this type of gravitational massage, it is called tidal heating tid Tidal heating, for making it possible to have life as we know it on the moons of planets that have tidally heated those moons, so it opens the net to cast a much wider net in a search for life in the universe.

I'm not sure if anyone has asked or answered, but I'm curious as to where Neil Tyson was for the solar eclipse, hopefully. It was a clear sky Thank you for those warm wishes It was a state secret Where I was until the eclipse I was at Deadwood Overlook 7,200 feet up in the mountains of Idaho checking the solar total It's the universe expanding into space Bigger than the universe itself, is there a clear limit to expansion? So yes, we are expanding, but if that is what we define as all of space, then there are higher dimensions where this is happening, in principle, you can step outside our universe and look. down or up, but then you're in another dimension, so we don't have access to that dimension, so we're stuck, we made dimension, they give you three space and time dimensions, beat time by just a couple more Whatever Donnie shouts, if aliens exist, how do I know I'm not one?

Well if you visited another planet with life you would be an alien to them clearly you are probably not an alien because you share all the same organs in the same place with the same biochemistry and very common DNA with the person sitting in front of you and everyone else who walk this earth, you have DNA in common with yeast cells, with an apple, and with oak trees, so that's the best evidence we know that you yourself are not. an alien Jacob Warren they all believe in quantum mechanics or the theory of relativity which is better they don't have that option each of them exists and works and makes predictions that are verified both are a little crazy but now they apply to reality it turns out Since we already know the limits of relativity, it cannot describe the center of a black hole, so we know that relativity will have to be expanded or modified at those extremes to understand that quantum physics, quantum mechanics, works everywhere. that we have known.

I applied it everywhere, so in that sense it is the most successful theory of the universe that has ever been put forward. It might be possible that in the future quantum physics will subsume relativity entirely to take you to those singularities, the center of the black hole. and the beginning of the universe, but now they both work and we are completely happy with them, the latest Twitter naphthalene, so the theory of relativity, the prediction of the effects of gravitational fields in space, peace. I believe that the rise of science has promoted greater peace. and prosperity in the world certainly prosperity and often where there is prosperity there is less need to take your neighbor's things if you look at the age of science and you look at the types of wars that people fought and what fraction of people would die in a one culture war Despite even these aberrations like the first and second world wars, a much smaller fraction of all humans died in those wars than those who died in tribal wars.

If you go back thousands of years, you could lose a third of your men fighting in them. a battle just to gain access to property that does not occur in an organized war, no war is good of course, but it may be that science as a path to prosperity and health eliminates many of the reasons we once had war in the first place. so the theory of relativity has another branch, physics, science in general, peace, yes, peace, yes, I am very impressed with the cosmic curiosity that exists, keep coming and, as always, keep looking, the guys know about this, especially a thermometer, it's a closed system in this air here.

Ambient temperature is generally colder than body temperature, that's why we have to continually eat like warm-blooded creatures to maintain this temperature difference. We are basically 100 degree organisms, the correct air is 70 degrees, so if I heat this air, then I cool it.