Today is #NationalMammographyDay. Did you know Hubble technology has been used to help make breast biopsies less painful and has helped with earlier breast cancer detection and treatment? Hear one story about a Hubble science writer and how she benefited from this technology: https://t.co/jE7MkZeVsY

#HubbleFriday Galaxy NGC 4380 looks like a special effect straight out of a science fiction or fantasy film, swirling like a gaping portal to another dimension. In the grand scheme of things, though, the galaxy is actually quite ordinary: https://t.co/6m2snLkldY https://t.co/dIUm0NydnL

#HubbleClassic As a Sun-like star nears the end of its life, it can produce a psychedelic work of art in space. The glowing clouds of the Saturn Nebula are the cast-off outer layers of a dying star about 1,400 light-years from Earth: https://t.co/sIrCyoI9u6 https://t.co/PXaEfsCBPV

Dr. Jennifer Wiseman is the Hubble Space Telescope Senior Project Scientist at NASA’s Goddard Space Flight Center.  Her research expertise is in star and planet formation in stellar nurseries of interstellar clouds in galaxies like our Milky Way. https://t.co/WUFs9pFH70

Max Mutchler is a scientist @stsci in Baltimore, where he has worked on Hubble for almost 30 years. He is an expert on Hubble’s cameras, & specializes in using them to observe Solar System objects. Max is now transitioning to work on @NASAWFIRST, a future space telescope. https://t.co/XxRldvRLqH

Dr. Kenneth Carpenter is the Hubble Space Telescope Operations Project Scientist & the WFIRST Ground System Project Scientist @NASAGoddard in Greenbelt, Maryland.  His research specialty is on the outer atmospheres & winds of cool, evolved stars. He's here to answer questions! https://t.co/Bh9X0p63LM

Hubble captured a new view of an interstellar comet! That's a comet that came from outside our solar system, in the mysterious region of space between stars. ☄️ 

Have questions? Join scientists later today from 2-4 p.m. EDT to get them answered!

https://t.co/Iqjnx5Xuod https://t.co/5rnaMVDOPY

Hubble has given astronomers their best look yet at an interstellar visitor — comet 2I/Borisov — whose speed and trajectory indicate it has come from beyond our solar system: https://t.co/v1F4WB9ZLE https://t.co/3aHymNCi5r

#HubbleFriday Seeing the profile of galaxy NGC 3717 can provide a vivid sense of its three-dimensional shape. Spiral galaxies are mostly thin disks, but they have bright, spherical, star-filled centers that extend above and below: https://t.co/udIHfCXo9z https://t.co/4fsXRuhMm2

What does the universe feel like? 

For #WorldSightDay, we're exploring what it feels like when science is accessible to us all.

NASA Braille books: https://t.co/TMyj8zTczc https://t.co/1Eg4xHp83f

Supernovas and violent stellar winds blow gas out of the galactic disk, but that gas falls back onto the Milky Way to form new stars. In an effort to conduct a full accounting of this process, astronomers were surprised to find a surplus of incoming gas: https://t.co/6K8bElAvol https://t.co/HEPtPtrdEJ

#HubbleClassic Today, Hubble has been in space for a full Saturn year, which is equal to 10,759 Earth days (or about 29.5 Earth years). These images, taken from 1990 to 2019, show how Hubble's views of #Saturn have gotten better over time as its cameras have improved. https://t.co/j2oYmZXlaa

#HubbleFriday The Medusa merger (aka NGC 4194) was not always one entity, but two. About 130 million light-years away, an early galaxy consumed a smaller gas-rich system, throwing out streams of stars and dust into space.   https://t.co/dSqkiMU3VP https://t.co/VAmdbSH6fP

#HubbleClassic Wrapped in the gaseous remains of supernova explosions, NGC 1850 is a double star cluster in a neighboring galaxy, the Large Magellanic Cloud. A huge collection of stars near the center is accompanied by a smaller group (lower right). https://t.co/9i0hZvEVRd https://t.co/AwSCUtbJ5w

#HubbleFriday Messier86 is moving through space remarkably quickly — its current trajectory is bringing it back towards the center of its cluster at the incredible speed of over 543,000 mph! https://t.co/SH2ItqN7xn https://t.co/2LQ9dwBkMv

Did you miss our Tumblr post on Tuesday? Check it out now to learn about Hubble’s 5 weirdest black hole discoveries! https://t.co/tZu4X9XHq0 #blackholeweek https://t.co/jOpU7S04P0

A black hole lurks in the center of this #HubbleClassic image of globular cluster M15.  But it isn’t just any black hole — it's an especially interesting type, with a mass between supermassive and stellar-mass black holes. https://t.co/ks4R8aIplz #blackholeweek https://t.co/difrYclAd3

Hubble helped confirm that the giant galaxy M87 harbors a black hole 2.6 billion times more massive than our Sun and revealed stunning detail in the jet of subatomic particles streaming away from the central black hole. https://t.co/fuLIyTTb96 #blackholeweek https://t.co/9KakPN1i7B

What happens when supermassive black holes meet gravitational waves? 🤔 Apparently the black hole can be sent flying!  Learn more about this Hubble black hole discovery and others here: https://t.co/FVYsQj0eDQ #blackholeweek https://t.co/j9IsPzDMXt

RT @NASAUniverse: It’s #BlackHoleWeek! Ever thought about visiting a black hole? We wouldn’t recommend it …  

Still want to? Well, we have some safety tips for you. 
https://t.co/NOky70zQv7 https://t.co/n5fapkUNfP