You're Walking In The Woods. No One Is Around And Your Phone Is Dead. Out Of The Corner Of Your Eye You

if you only have time for one video, make it this one

This is what happens when Two Black Holes Collide.

This is the animation of the final stages of a merger between two black holes. What is particularly interesting about this animation is that it highlights a phenomenon known as Gravitational Lensing.

What is Gravitational Lensing?

Mass bends Light. What? 

Yeah, mass can bend Light. The gravitational field of a really massive object is super strong. And this causes light rays passing close to that object to be bent and refocused somewhere else.

The more massive the object, the stronger its gravitational field and hence the greater the bending of light rays - just like using denser materials to make optical lenses results in a greater amount of refraction.

Here’s an animation showing a black hole going past a background galaxy.

This effect is one of the predictions of Einstein’s Theory of General Relativity 

PC: cfhtlens, Urbane Legend

This volcano in Indonesia emits electric-blue “lava” 

Kawah Ijen, in Indonesia’s Ijen volcano complex, is the biggest “acidic volcanic crater lake” in the world. It also happens to emit lava which appears luminescent and electric-blue. The lava, like all other lava, starts out red. Then it hits the “pockets.” (Photos via @reubenwu)

(photos by Robdogbird)

The rings of Saturn as seen from the Cassini space probe. (via)

Rocket engine exhaust often contains a distinctive pattern known as shock diamonds or Mach diamonds. These are a series of shock waves and expansion fans that increase and decrease, respectively, the supersonic exhaust gases’ pressure until it equalizes with atmospheric pressure. The bright glowing spots visible to the naked eye are caused by excess fuel in the exhaust igniting. As awesome as shock diamonds look, they’re actually an indication of inefficiencies in the rocket: first, because the exhaust is over- or underexpanded, and second, because combustion inside the engine is incomplete. Both factors reduce a rocket engine’s efficiency (and both are, to some extent, inescapable). (Photo credit: XCOR)

@rasinblazin

this changes everything oh my god

do you understand why it trips me out that people can drive 45 minutes and be in aNOTHER COUNTRY? I drive for 45 minutes and im like

a city over 

I live in “Italy” and took a day trip to go to “Austria” and “Germany”

 #it is literally impossible to leave texas #you will be in texas #FOREVER

Chums, that’s sweet, and all, but Australia just ate Texas for breakfast. 

If you drive for 45 minutes in Australia you aren’t a city over, you’re just 45 minutes away from the city.

If you drive for 45 minutes in Australia you may not even leave the cattle station.

If you drive for 45 minutes in Canada you may not even leave your driveway.

If I drive 45 minutes in the us I’m just at another mcdonalds

If I drive for 45 minutes in Northern Ireland I’m 10 minutes into the sea.

I can’t drive. 

I will use this post to explain tumblr

Kennedy Space Center | by North Sky Photography

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