"Hope is like the sun. If you only believe it when you see it, you'll never make it through the night." -Princess Leia
286 posts
Latest Posts by delightfulskywalker - Page 6
Insomnia is his mind’s revenge for all the tricky thoughts he has carefully avoided during the daylight hours.
The Course of Love by Alain de Botton
“She was so conscious of her place in culture and what she meant to the female fans. She always wanted to stay true to that. She made sure young girls grew up seeing Princess Leia as a female hero.” - Rian Johnson
there is a difference between people who are smart and people who get good grades
Mark Hamill, New York, 1980
My prof asked the class “who was emperor when jesus was born?” And a kid responded “Palpatine”
Luke in the Millennium Falcon A New Hope (1977) // The Last Jedi (2017)
Moon and Aldebaran
Image credit: Frank TYRLIK
the next few years tbh
someone: *mentions bigbang*
me:
I love you mom
Reblog or your mom will die in 928 seconds.
I love my mom.
I am risking nothing
I AM SORRY FOLLOWERS, I LOVE MY MOMMY
Will not risk.
sorry followers :(
Reasons Why G-Dragon is cooler than you
Not only can he moonwalk like a boss,
He can do it at your favorite theme park,
On the great wall of China
At Buckingham Palace
In your favorite movies,
While defying the laws of science,
This boy even has swagger on the moon.
leave me alone
some things just never change
Happy Birthday, TOP!!!! 🎉🎈🎂🎁👑🔝💕🙏
Actor Seunghyun
Badass rapper
Bingu TOP
Dedicated and Caring Hyung
Loving Uncle
Pure art
#HappyTOPDay
Gifs not mine^^
😂
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, Hubble, Chandra 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.
Make sure to follow us on Tumblr for your regular dose of space: http://nasa.tumblr.com
Never let anxiety fool you into thinking you’re not strong enough for something. Never let your anxiety fool you into thinking that you can’t achieve your biggest dreams. Never let anxiety convince you that you’re not loved or that there’s something wrong with you. Never let anxiety fool you into thinking that this is how you will be for the rest of your life. Never let anxiety control you.
(via thinkhapppy)
it’s killing me
Anxiety is like constantly hearing the battle or enemy music but never seeing the actual threat.
M60-UCD1 black hole, via NASA
me: *is left alone with my thoughts for more than two seconds*
me: the suffering begins
Having an anxiety disorder is like that moment where your chair almost tips or you miss a step going down the stairs but it never stops