Video showing how common Asteroid impacts are. In 13 years (2000-2013) over 20 explosions as powerful as nuclear bombs were recorded in the atmosphere.
Via That Science Guy
- Lots of Strawberries
Magnetic Resonance Imaging (MRI) uses Magnets and Radio waves to create images of internal structures - each image acting like a piece of bread in a loaf coming together to create a 3d image.
Via That Science Guy
New shape: http://bit.ly/1jHVFID
Y chromosome: http://bit.ly/1hrLASQ
Coldest star: http://bit.ly/1fgit6q
Mimic plant: http://bit.ly/RToETw
The Blackbird was a thing of Beauty, and quite possibly the most popular plane ever built, despite the public not knowing about it for 30-odd years!
A friend and I were discussing the color of the sky when he asked why it didn’t turn green in between its blue and red/yellow phases, and i actually had no idea. So I went and found out and I thought i might as well tell you guys as well, and while i’m at it why not explain the blue and red at the same time!
We all know (hopefully) that the sun emits white light, light consisting of all visible wavelengths. When this light goes through the atmosphere it is scattered in different ways, blue (shortest wavelength) light gets scattered the most, then green, then red/yellow (longest wavelength.) This is called Rayleigh Scattering. It just so happens that our atmosphere is the right size and composition to scatter blue light without affecting the others too much, So this is what ends up happening -
Imagine the black line as the barrier between the atmosphere and space, and the blue lines represent blue light. (Note this happens throughout the atmosphere, not just at the barrier.) So when light is heading towards California while you’re in New York, theres a chance that the blue component will bounce away and make it to your eyes, making it appear as if the atmosphere is blue - no matter where at the sky you look.
Without this natural phenomenon we would be able to see stars during the day. Or in another case, if we had more violet photoreceptors in our eyes the sky would appear violet instead of blue.
Now when the sun is setting or rising light must pass through more of the atmosphere to get to your eyes:
This means that blue light is now scattered so much that it cannot be seen, however the red light is slightly changed, so the area of the sky around the sun appears red:
Now to answer the original question - why is there no green transition? Why does it go from blue to red instead of blue to green to red?
The answer - It Does!…Kinda…
In the transition from Blue to Red there is a phase where green light is scattered enough to be detected, however during The First Half of this phase blue light is still seen, so the two mix together to produce Turquoise! (Turquoise = cyan = teal = aqua (Roughly)) Which is observed in the early morning/late afternoon!
In the second half of this phase, however, blue light is for the most part gone - so why doesn’t it go green now? - Red light starts to scatter too, and when red and green light is mixed you get Yellow! Which is seen right before sunset/right after sunrise!
(…I apologize for my horrible whiteboard drawings, I never realised how hard it was to draw on a whiteboard but this is what i have it for, so why not use it?!)
sevenofnine24567 said: can we go to the hadron collider sometime?
Like a PhysicsPhysics field trip?
It’s a bit of wishful thinking, I suppose. But it would certainly be very fun!
According to the laws of physics, a planet in the shape of a doughnut (toroid) could exist. Physicist Anders Sandberg says that such planets would have very short nights and days, an arid outer equator, twilight polar regions, moons in strange orbits and regions with very different gravity and seasons.
Read more: http://bit.ly/1kPLXGT via io9
petition to turn the earth into a fucking doughnut
We’re on board.