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Last 50 tweets from @NASAHubble
A Hubble image of one of the largest Einstein rings ever seen prompted new research.

This "ring" is created by gravitational lensing – when light from a distant galaxy is warped by the gravity of an object between the light source and the observer:
Hubble found galaxies running on empty! ⛽

Astronomers discovered six massive, "dead" galaxies that had run out of the cold hydrogen gas needed to make stars.

Learn more about this unusual discovery:
This week’s #HubbleClassic is easy on the eyes! 🌟

The galaxy ESO 99-4 lies in a field of foreground stars. ESO 99-4’s peculiar shape probably came as the result of galactic merging in the past, which left it deformed and shrouded in dust:
🔵 Dual nature 🔴

These #HubbleFriday views show different aspects of the expanding shell of gas and dust surrounding the star AG Carinae.

This nebula is about five light-years wide and 10,000 years old! Learn more and try our interactive image slider:
Take a listen to the star cluster Westerlund 2 👂

Through the process of sonification, data from Hubble and @chandraxray is interpreted in sound!

Hubble data is played by strings and Chandra's X-ray data is represented by bells.

More sonifications:
Congratulations to #Inspiration4 on a successful launch! There are some special “passengers” flying with the crew…

Patches celebrating Hubble’s 30+ years of discovery!

Thanks to @Inspiration4X for bringing this symbol of exploration with you on your journey.
At 400 million light-years away, this #HubbleClassic view shows off the galaxy triplet Arp 274.

Two of the galaxies are forming new stars, evident in the bright blue knots in the arms of the galaxy on the right and along the small galaxy on the left:
Got any plans for 2037?

A supernova “replay” is expected to appear in about 16 years, thanks to the magnification and splitting of light caused by the gravity from an enormous galaxy cluster that lies between us and the faraway supernova:
What’s your sign? If you’re a Sagittarius, you’re in luck. ♐

Today’s #HubbleFriday shows a beautiful view located in the constellation Sagittarius. The star cluster NGC 6717 dazzles in this Hubble image from over 20,000 light-years away!

For more:
#StarTrekDay reminds us that Hubble gazes into the final frontier every day!

Hubble’s Frontier Fields program probed the early universe by studying large galaxy clusters, like Abell S1063, seen from four billion light-years away.

"Boldly go" & read more:
Let’s take a look 30 million light-years away 👀

Here's a #HubbleClassic view showing the galaxy NGC 1512’s unique core.

This 2,400 light-year-wide circle of infant star clusters is called a "circumnuclear" starburst ring. Discover more:
Could dying stars hold the secret to looking younger? 🤔

New evidence from Hubble suggests that white dwarf stars could continue to burn hydrogen in the final stages of their lives, causing them to appear more youthful than they actually are:
Hubble Retweeted ·  
Brilliant, hot, young stars shine bright in this @NASAHubble image of the Small Magellanic Cloud. 🤩 Learn more about this nearby — only 210,000 light-years away — star-forming region in space:
May the #HubbleFriday force be with you! 🤩

But this cosmic view isn’t a lightsaber – it's a Herbig-Haro object, formed when a young star ejects jets of material that collide with nearby clouds of gas and dust.

Learn more about this celestial phenomenon:
Hubble Retweeted ·  
👁️ I spy with my little eye...

...a 2014 Hubble portrait of the Helix Nebula! #NASAWebb scientists will use the observatory’s Mid-Infrared Instrument to determine the mass, temperature, & composition of the dusty disk surrounding this nebula's aging central star.
✨ Your midweek cosmic escape ✨

This Hubble image shows Caldwell 87, which is a globular cluster – a spherical group of stars gravitationally bound to each other!

Caldwell 87 is 50,000 light-years away in the constellation Horologium.

Learn more:
In reply to @NASAHubble
Nice! What is the time compression of this time lapse?
Replying to @Teutates5
This video shows images taken by Hubble in 1994, 1997, and 2007!
⭐ Did you know stars send out "birth announcements"? They fire off supersonic jets of glowing gas in opposite directions through space!

#OTD 10 years ago, scientists released time-lapse videos featuring Hubble observations of jets:
Hubble Retweeted ·  
What do #whalesharks and stars have in common? @NASAHubble has helped us track both! An algorithm written to help Hubble track stars also helps us identify the spot patterns on individual whale sharks to track them too! #InternationalWhaleSharkDay
Holmberg IX is where the young stars hang out. 🌟

Well, by young, we mean 10 to 200 million years old. About 90% of the stars in this #HubbleClassic image are estimated to be in that range!

This galaxy is roughly 12 million light-years away! More at:
In reply to @NASAHubble
What is the longest exposure Hubble has ever taken (or is able to take)? Or are they all certain exposure lengths that are then stacked for details?
Replying to @naztronomy
Hubble images are stacked exposures. The Hubble Xtreme Deep Field is 2,000 images stacked, taken by two cameras, over 50 days, using two million seconds of exposure time. Later deep fields add in even more color/wavelength bands:….
Hubble Deep Fields
In reply to @McAwesome404
We expect Hubble to be producing excellent science throughout this decade, and hopefully beyond. Eventually, when the observatory is no longer being used for science, the telescope will be carefully pushed into a higher orbit or else safely into the ocean.
While the original idea of putting the observatory in a museum is no longer feasible, some parts of Hubble are already there! Astronauts during recent servicing removed the Wide Field/Planetary Camera 2 and the COSTAR instrument and put them in the National Air and Space Museum.
In reply to @NASAHubble
When Hubble is discontinued, will it remain in orbit, or will it take a death dive into the atmosphere? If the latter, why not try to preserve it? I get space litter is a problem but Hubble is iconic.
Replying to @McAwesome404
We expect Hubble to be producing excellent science throughout this decade, and hopefully beyond. Eventually, when the observatory is no longer being used for science, the telescope will be carefully pushed into a higher orbit or else safely into the ocean.
In reply to @NASAHubble
There is no doubt that Hubble was a game changer that let us see so much from so far BUT what will the NOW generation of deep space telescopes show us that Hubble can't? Are we still looking at similar devices are are the radio telescopes taking over.
Replying to @Darlio131
The next big mission is the @NASAWebb Space Telescope, an infrared telescope, set to launch this year. It will look much closer to the beginning of time and see the first stars and galaxies, as well as to look inside dust clouds where stars and planetary systems are forming.
In reply to @NASAHubble
When a galaxy is identified and named how do you identify it back after a certain time considering the fact that Universe is expanding faster than the light speed and doesn't Hubble give us a different image or data then?
Replying to @prasad_dasarp
For every 3.3 million light-years farther away a galaxy is from us, it appears to be moving 46 miles per second faster, due to the expansion of the universe. Since the galaxies are so far away, their position in the sky from Earth's perspective barely changes over the years.
How many galaxies do you think are in this image?

Looks can be deceiving 😲

Only two galaxies and one quasar appear in the center of this #HubbleFriday view, but gravitational lensing caused the fabric of space to warp. Find out how:
In reply to @joebrony
Yes! Hubble observes in the ultraviolet, optical, and some of the infrared, while Webb observes in the red part of the optical and further out into the infrared. Having both sets of observations allows us to learn more about the object of study than either telescope does alone.
In reply to @NASAHubble
When will the james webb be released into space,and how powerfull is it compared to hubble.
plans to launch later this year! Webb has very powerful infrared vision and will see farther into the early universe. The telescopes have different abilities; Webb will primarily observe in infrared, whereas Hubble observes visible, ultraviolet, and some infrared light.
In reply to @mandylaneart
Several different cameras have been used on Hubble over its mission. The cameras now in use include the Wide Field Camera 3 (WFC3) and the Advanced Camera for Surveys. WFC3 uses a 16 megapixel CCD, combined with a wide field of view (160 arcseconds):…
In reply to @NASAHubble
How long will Hubble Telescope remain operational?
Replying to @FaisalS21772380
Hubble is in great health, and we expect the telescope to continue scientific observations throughout this decade and hopefully beyond. The robust archive of Hubble data will continue to support new Hubble findings for many years beyond the end of Hubble's observational mission.
In reply to @NASAHubble
Can the human eye see similar kinds of images of space if viewed from a viewable distance as like thru hubble telescope apparatus
Replying to @therealcoolniks
When Hubble produces a true color image, you may see it exactly like that. However, Hubble uses digital cameras that can collect light over a period of time and your eyes can only see it instantaneously. Long exposures can reveal more color information of dim objects.
Hubble Retweeted ·  
Testing complete ✅

#NASAWebb has completed testing at @NorthropGrumman, demonstrating that it can survive its journey into space. Engineers are now preparing to ship Webb to its launch site of Kourou, French Guiana:
Hubble Retweeted ·  
In reply to @NASAUniverse
Hubble observes the cosmos in multiple wavelengths of light. They range from ultraviolet, visible, and near-infrared. Hubble peered at the iconic Eagle Nebula in visible and infrared light, revealing these grand spires of dust and countless stars within and around them.
Happy #NationalDogDay! 🐶

This Hubble image captures the brightest star in our sky – the “Dog Star” Sirius! Try to find its white dwarf companion, Sirius B, in the lower left.

Sirius is 8.6 light-years away, the fifth closest star system known:
Spiral galaxy NGC 3982 dazzles in this #HubbleClassic view! 😍

The galaxy’s arms are lined with pink star-forming regions of glowing hydrogen, blue newborn star clusters, and dark dust lanes that provide the raw material for future generations of stars:
From up in space to down on Earth, careers with Hubble have always been out-of-this-world! 🌎 🚀

Learn more about different roles on the Hubble mission here:…

Get more career inspiration with @NASASTEM! 📚 #BackToSchool
In reply to @NASAHubble
i seem to remember hearing or reading once that the hubble deep field covers an area of sky roughly equivalent to a grain of rice held at arm's length. would this be about right ?
Replying to @narraboat
Yes, just about! The Hubble Ultra Deep Field image's width, from our perspective on Earth, would cover the amount of space that you see in the eye of a needle held out at arm's length.
In reply to @NASAHubble
Can the Hubble get images of the moon, including the dark side? How about individual planets in our system?
It's possible for Hubble to observe small portions of the Earth-facing side of the Moon, but it's difficult because the Moon is moving quickly across the sky and not in a straight line. Hubble has photographed all planets in the solar system except Mercury.
In reply to @NASAHubble
What we can see unedited pictures from Hubble telescope? Can we see what Hubble is seeing right now?
Replying to @rs_techie
Hubble images require some calibration before they are ready for use, but you can see a nice gallery of them at and You can find out what Hubble is observing right now at!
In reply to @NASAHubble
Just want to know how is maintenance carried on in Hubble these days? Do the astronauts still travel to Hubble from the ISS to carry out any manual fix?
Replying to @sayan_dey
At the moment, it is not possible to service Hubble, now that the Space Shuttle is no longer flying. So we have to fix or get around any hardware problems by changing operational procedures or utilizing built-in backup hardware.
In reply to @EdDinIL
Hubble’s images are recorded in grayscale, but scientists can create a composite color image by taking exposures using different color filters on the telescope, assigning a color to each filter that corresponds to the wavelength of that filter, and combining the images.
Replying to @NASAHubble @EdDinIL
The original raw images are available in the Hubble Archive:
In reply to @NASAHubble
Would you please explain your image coloring process, and do you ever have plans to release raw, unaltered images for comparison?
Replying to @EdDinIL
Hubble’s images are recorded in grayscale, but scientists can create a composite color image by taking exposures using different color filters on the telescope, assigning a color to each filter that corresponds to the wavelength of that filter, and combining the images.
In reply to @de_varse
Both the general public and professionals in the astronomical community are often moved by the sheer beauty of many Hubble images. It is one of many rewards of working on and viewing the universe with Hubble.
Hubble Retweeted ·  
This long-exposure image was taken by @NASAHubble in 2013. It shows the massive galaxy cluster Abell 2744 and includes some of the faintest and youngest galaxies ever detected in space!…
In reply to @NASAHubble
After James Webb telescope replaces Hubble, will it still be functional or dismantled/abandoned? How much better will it's successor gonna be?
Replying to @surajkiller
Webb is not replacing Hubble, and Hubble will continue its mission after @NASAWebb launches. The two observatories are complementary in many ways, though Webb's powerful infrared vision will allow it to observe the early universe in wavelengths Hubble cannot detect.
In reply to @NASAHubble
I always wonder where can i find real unedited pictures taken by hubble, so i can see the reality different from human's wild imagination
Replying to @AHannanNadeem
That can be found at the Hubble Legacy Archive:
In reply to @NASAHubble
What would it look like to work on the telescope? Is there any chance the telescope could help us figure out things about Sag. A* and other black holes further?
Replying to @skatesinging
There were five astronaut servicing missions that worked on the telescope! You can see images and learn more here:… And absolutely! Hubble has made important discoveries about black holes. Find out more here:…
In reply to @NASAHubble
What is Hubble's utilization throughout the years. Is all the work that hubble does open to the scientific community for study?
Replying to @biffstephens
Hubble has taken over 1.5 million observations. After six months, all Hubble data is available to the world through our archive. Over 18,000 scientific papers have been published on that data. And almost 1 million references to those papers have been made in other papers.
In reply to @NASAHubble
How much longer is Hubble expected to operate? Can it boost its own orbit?
Replying to @nargamercuga
Hubble can't boost its own orbit, but it is expected to remain operational for years to come.
In reply to @NASAHubble
Are there any research endeavors that can be accomplished using the combination of Hubble and JWST that would otherwise be unable to be done? Is the Hubble team looking forward to potentially working with the JWST team on any projects in the near future? Thanks @NASAHubble !
Replying to @CommiNathan
With their different abilities, @NASAWebb and Hubble will work together to help us get a better understanding of our universe! For example, Hubble’s deep-field science will be taken even further with Webb:…
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