gravity collider

When Dead Stars Collide!

Gravity has been making waves - literally.  Earlier this month, the Nobel Prize in Physics was awarded for the first direct detection of gravitational waves two years ago. But astronomers just announced another huge advance in the field of gravitational waves - for the first time, we’ve observed light and gravitational waves from the same source.

There was a pair of orbiting neutron stars in a galaxy (called NGC 4993). Neutron stars are the crushed leftover cores of massive stars (stars more than 8 times the mass of our sun) that long ago exploded as supernovas. There are many such pairs of binaries in this galaxy, and in all the galaxies we can see, but something special was about to happen to this particular pair.

Each time these neutron stars orbited, they would lose a teeny bit of gravitational energy to gravitational waves. Gravitational waves are disturbances in space-time - the very fabric of the universe - that travel at the speed of light. The waves are emitted by any mass that is changing speed or direction, like this pair of orbiting neutron stars. However, the gravitational waves are very faint unless the neutron stars are very close and orbiting around each other very fast.

As luck would have it, the teeny energy loss caused the two neutron stars to get a teeny bit closer to each other and orbit a teeny bit faster.  After hundreds of millions of years, all those teeny bits added up, and the neutron stars were *very* close. So close that … BOOM! … they collided. And we witnessed it on Earth on August 17, 2017.  

Credit: National Science Foundation/LIGO/Sonoma State University/A. Simonnet

A couple of very cool things happened in that collision - and we expect they happen in all such neutron star collisions. Just before the neutron stars collided, the gravitational waves were strong enough and at just the right frequency that the National Science Foundation (NSF)’s Laser Interferometer Gravitational-Wave Observatory (LIGO) and European Gravitational Observatory’s Virgo could detect them. Just after the collision, those waves quickly faded out because there are no longer two things orbiting around each other!

LIGO is a ground-based detector waiting for gravitational waves to pass through its facilities on Earth. When it is active, it can detect them from almost anywhere in space.

The other thing that happened was what we call a gamma-ray burst. When they get very close, the neutron stars break apart and create a spectacular, but short, explosion. For a couple of seconds, our Fermi Gamma-ray Telescope saw gamma-rays from that explosion. Fermi’s Gamma-ray Burst Monitor is one of our eyes on the sky, looking out for such bursts of gamma-rays that scientists want to catch as soon as they’re happening.

And those gamma-rays came just 1.7 seconds after the gravitational wave signal. The galaxy this occurred in is 130 million light-years away, so the light and gravitational waves were traveling for 130 million years before we detected them.

After that initial burst of gamma-rays, the debris from the explosion continued to glow, fading as it expanded outward. Our Swift, HubbleChandra and Spitzer telescopes, along with a number of ground-based observers, were poised to look at this afterglow from the explosion in ultraviolet, optical, X-ray and infrared light. Such coordination between satellites is something that we’ve been doing with our international partners for decades, so we catch events like this one as quickly as possible and in as many wavelengths as possible.

Astronomers have thought that neutron star mergers were the cause of one type of gamma-ray burst - a short gamma-ray burst, like the one they observed on August 17. It wasn’t until we could combine the data from our satellites with the information from LIGO/Virgo that we could confirm this directly.

This event begins a new chapter in astronomy. For centuries, light was the only way we could learn about our universe. Now, we’ve opened up a whole new window into the study of neutron stars and black holes. This means we can see things we could not detect before.

The first LIGO detection was of a pair of merging black holes. Mergers like that may be happening as often as once a month across the universe, but they do not produce much light because there’s little to nothing left around the black hole to emit light. In that case, gravitational waves were the only way to detect the merger.

Image Credit: LIGO/Caltech/MIT/Sonoma State (Aurore Simonnet)

The neutron star merger, though, has plenty of material to emit light. By combining different kinds of light with gravitational waves, we are learning how matter behaves in the most extreme environments. We are learning more about how the gravitational wave information fits with what we already know from light - and in the process we’re solving some long-standing mysteries!

Want to know more? Get more information HERE.

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Coincidence (Lotor x Reader)

Summary: Lotor crashes next to your house and you help him. You have (sort of) history.


Warnings: Season 4 spoiler!!!, eh it skips a few times and I personally hate skips so yeah, I also apologize for unnecessary paragraphs but since the new Tumblr update it happens


Note: this calls for a part 2, does it not?


»»»»

You were torn from sleep as the night lit up in bright fiery colors followed by a dull sound so loud your bed shook. For a second you panicked. Did the Galra find you? Would they finally be able to punish you for the crimes against the empire you committed? They would torture you, stream it into every last corner of the galaxy just to make an example out of you.

You, the rebel that by hairbreadth killed the emperor and his son.

You grabbed your gun and took a look outside. Relief floated through you, seeing the ship that has crashed right next to your hideout.

It was up in flames and your feet carried you forward automatically. The pilot.

You jumped onto the ship and climbed inside. The smoke was burning in your eyes as you looked for the pilot and eventually you saw a figure.

You grabbed the pilot and flung in on your shoulder, carrying him outside and far enough away in case the ship explodes.


“Hey!” You let him down. “Are– Lotor?” you said in pure shock as you took the pilots helmet off, revealing it was the one and only Prince Lotor.

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Absolute Destiny [MegOP, G]

A/N: @subterranean-waters here you go! 

So good and so wholesome… Too good. Time to make it weird. I thought about making a domestic thing for this, but I went with trippy instead. This is my brain on synth-pop and Utena

Verse? All of them.

*

Absolute destiny

There were plateaus of neon and fabric of stars stretching over them. There were swirling galaxies and there was time that spanned across everything, completely meaningless. There was the universe and then there were its reflections, bottomless corridors of identical images like mirror against mirror.

And then there were two sparks locked in combat. 

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When a Goddess and a Queen Reign Supreme

It took years. Years of fighting, years of lying, years of building walls. But oh

Oh when they came together, how the world trembled. It shook on its axis, reeling with their gravity. Two stars colliding, pulling the fabric of the universe with their fingers. For their parts could never measure to their combined whole.

They took down governments, corrupt officials, saved those who could not fight, fought for those with no voice. Their names etched into stone again and again. They were a goddess and a queen and they could do anything.

The walls they built remained standing, glorious in their creation, not a hole to find because when they crashed together, it was through open doors, open window, anything to feel their arms together. And within their castle, they slept, wrapped in each other’s embrace, while the sun burned on.

Their names worked into songs, odes to their lives. Statues and buildings their memorials showed them as they were: strong, united, in it to win it.

And win they did, battle after battle, for the whole of their lives. Until the Queen’s last breath, labored with triumph, escaped her lungs. The Goddess left. She’d done what she’d wished for, her counter-star gone, there wasn’t enough gravity keep her tied to the Earth.

She went up, burst through the stratosphere, and with a final song of brilliance, she returned to the stars to watch over the blackness of space as a constellation.

Bad Blood

Photo Creds: x // related moodboard: x 

yoyoyo my dudes it’s been a while, huh? haha, i’m glad to be back at it with another scenario. this was totally inspired in part by @remembeo ‘s absolutely divine exo aus, please please please go read them!! to the most wonderful patient darling anon waiting for the sehun scenario (if you still exist and are still waiting for it??) i’ve been having a hard time finishing it. it is coming but i just want to make sure i’m writing you the best possible scenario i can because you don’t deserve anything i’m less than proud of. i hope everyone has a most wonderful weekend and for the americans, happy thanks giving!!

Pairing: Luhan x Reader

Word Count: 2.813k

Genre / Rating: Angst / PG13

Warnings: blood, mild violence

masterlist~

Queen of Darkness, Monarch of Malevolence, Vyer for Villainy.

There had been a lot of chatter surrounding you lately, several titles already adorning your identity. You, a vampire empress recently debuted on the forefront of inter-species conflict, had already accomplished more for your species in this past century alone than either of the powers before you. It hadn’t been easy. You had made countless sacrifices. At least the less you had to distract you, the more efficient you became. But alas, even the best machines couldn’t run forever.

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Fondness

Let’s wind the clock back,
To moments long before.
A time of fun and fatigue,
So let me tell some more.

We met for the first time,
After being so far apart.
Distance was our factor,
Right from the very start.

Finally we were together,
And the stars didn’t fade,
The universe then smiled,
At the pairing it had made.

Like planets which collide,
Our gravity made us one.
Two souls came together,
Burning hotter than a sun.

However it all moved fast,
And things began to fade.
Her eyes spoke the truth,
Of why she couldn’t stay.

I let her go for the night.
It was truly for the better.
She can come anytime,
But only when I let her.

Mayday

Fitz’s ship gives a violent shake, jostling to him to the side and nearly knocking him unconscious on a side panel, “Bollocks!” He scrabbles for the controls, attempting to manhandle the bloody thing into some semblance of order but it’s completely useless. This pickup hadn’t gone how he’d expected in the slightest. First of all, there was supposed to be an Ice Warrior there. Second of all, there was not supposed to be a swirling vortex of terror that ate him on the way back. The ship rolls heavily and he’s nearly flung into the back, saved only by the vicelike grip he has on the controls.

Around him, a bright swath of light and color zooms by, illuminating the cabin in all sorts of terrifying relief. His own face is a healthy mask of fear as a result before, abruptly, everything is gone. The craft free-falls from an unknown height (and Fitz really does lose his grip this time. Thanks, gravity.) before colliding heavily and skidding along a grassy field. Fitz himself lands hard on the deck, smacking his head and trapping his arm underneath him in what could possibly be a very bad position. The ship sits in a smoking heap, covered in mud and grass for several minutes, thankfully without bursting into flame or something equally dramatic. Finally Fitz manages to roll onto his back with a groan of pain. What the hell was that? Where is he?

First signs of self-interacting dark matter?

Dark matter may not be completely dark after all

For the first time, dark matter may have been observed interacting with other dark matter in a way other than through the force of gravity. Observations of colliding galaxies made with ESO’s Very Large Telescope and the NASA/ESA Hubble Space Telescope have picked up the first intriguing hints about the nature of this mysterious component of the Universe.

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When I first saw TFA I couldn’t get this image out of my head of two gallaxies colliding, in connection to Rey and Kylo.

Two strong forces who are pulled by each other’s gravity and collide and spin into one massive galaxy. It may seem very destructive, but there is such a distance between each individual star that they will hardly touch.

For Rey and Kylo, they are guaranteed to meet again, their stories are entertwined now. In the first film their encounters were very head-on, much like the initial clash of the two galaxies, and then they part. But like the galaxies I am sure they will continue to circle each other.