Could We Protect Mars-Bound Astronauts With A Magnetic Bubble?

“Could a synthetic magnetic bubble, like a mini-magnetosphere, protect a crewed mission to Mars from cosmic radiation, and would the energy cost be prohibitively high?”As much as some folks are keen on sending people to Mars as soon as possible, it’s become obvious that protecting any astronauts from an unsafe level of radiation…Read the full article on Forbes!Have your own question? Feel free to ask! Or submit your questions via the sidebar, Facebook, or twitter.Sign up for the…

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Would You Notice If An Atom Of Anti-Hydrogen Annihilated In Your Room?

“If an atom of anti-hydrogen came into existence in the room you are in, would you notice?”Anti-hydrogen is the antimatter equivalent of the hydrogen atom. The simplest atom in our Universe, hydrogen is usually made of a single proton and a single electron. Hydrogen is also one of the most abundant elements in our Universe by a large margin, but its antimatter counterpart has been rather difficult…Read the full article on Forbes!Have your own question? Feel…

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How Can We Tell When Something Hits The Moon?

Sound notoriously is poorly transmitted in space; it’s a pressure wave, and there’s just not enough material floating around in space in order for that pressure to survive any distance in space. So anything that happens outside the confines of our little atmosphere is soundless…Read the full article on Forbes!Have your own question? Feel free to ask! Or submit your questions via the sidebar, Facebook, or twitter.Sign up for the mailing list for updates & news straight to your…

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How Dense Is Dark Matter?

It very much depends on where you are! Dark matter as we understand it must be some kind of particle, or at least act like some kind of particle. We’re not exactly clear on what the exact nature of that particle would be, or what its individual mass is, or what kind of interactions…Read the full article on Forbes!Have your own question? Feel free to ask! Or submit your questions via the sidebar, Facebook, or twitter.Sign up for…

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How Big Is The Biggest Galaxy, And How Small Is The Smallest?

Of all the galaxies in our surveys of the sky, the biggest, most massive systems are always giant elliptical galaxies. These galaxies are thought to be the end product of repeated galactic collisions, and so the end result is an object, which, though full of stars…Read the full article on Forbes!Have your own question? Feel free to ask! Or submit your questions via the sidebar, Facebook, or twitter.Sign up for the mailing list for updates & news straight to…

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When You Turn Off A Light, Where Does The Light Go?

“In space, light will go on, and on, and on… In a windowless room, where does the light go when we switch it off?”Light is a pretty simple beast. In lieu of any interference, it will go on, and on, and on, as we see it doing in the vast (mostly) empty realms of interstellar & intergalactic space.Space is a rather unique case, because in between massive objects, light is travelling through something very close…

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What Does The Sun Sound Like?

“What sound does the Sun make, and would it be musical if we could hear it?”Sound is a tricky thing in space. Sound is a pressure wave, an oscillation in the density of air or water, which moves through the air or through water until it reaches something it can rattle. If that sound is reaching a human ear, and if the oscillation is within the range of frequencies we are sensitive to…Read the full…

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Is There Any Way To Slow Down A Solar Sail?

“I recently read an article about a project called Breakthrough Starshot. It’s been proposed to send a tiny craft to Alpha Centauri at 20% the speed of light and the craft(s) would arrive in 20 years or so. Let’s say that there’s been a successful launch and the tiny ship is on it’s way. Would Alpha Centauri have enough gravitational pull to capture an object moving that fast or would it be a one time…

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Would You Float At The Core Of The Earth?

“Thought experiment…if you built a bedroom sized room at the center of the Earth, and you are in that room, which way is down? Please explain to me why if you are surrounded by the same amount of mass in every direction, how does that NOT EQUAL NET ZERO? In other words, would that not be the exact same thing as weightlessness? So what would an illustration of the curvature of Space look like at…

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How Long Until The Moon Slows The Earth To A 25 Hour Day?

“At this rate of the Moon’s gravitational force slowing down Earth’s rotation, how long will it take to increase an hour to our day?”The Earth’s rotation is indeed being slowed down by the presence of the Moon - every year, the Moon gains a little energy from the Earth, and drifts a little farther away from us. This drift is imperceptible to the human eye, but measurable…Read the full article on Forbes!Have your own question? Feel free…

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