Today marks 29 years since Hubble was launched into space aboard the Space Shuttle Discovery! It has been unlocking the mysteries of the universe for nearly three decades. Here are a few science achievements from Hubble’s latest year in orbit. #Hubble29 https://t.co/gEC6kScLEV

It's #ToolTimeTuesday! Join NASA astronaut John Grunsfeld and EVA manager Russ Werneth in this episode of Hubble Tool Time to learn about the power ratchet tool used on Hubble’s first servicing mission in 1993: https://t.co/55mjByK4P6 https://t.co/rOXghMxDCD

Happy #PiDay! March 14th represented in numbers is 3.14, which is the first three digits in pi, a mathematical constant used to define the ratio of a circle's circumference to its diameter. Hubble observes circular objects every day, like this galaxy: https://t.co/QOhAcuPfel https://t.co/IFfVm9HeYA

#HubbleClassic This view of the Hubble Space Telescope, set against the blue-and-white backdrop of Earth, was captured by astronauts on the space shuttle after they'd finished upgrading the telescope during Servicing Mission 3B, which concluded #OTD in 2002. https://t.co/wFTkNslWqw

#Moon2Mars Hubble has studied the Moon & Mars, places where humans could be living & working in the near future. In 2005, Hubble viewed Aristarchus crater, one of the Moon's youngest & largest craters. In 2016, it captured a view of Mars when the planet was close to Earth. https://t.co/ASoKc80bHq

Today is #InternationalWomensDay! Listen to the stories of six women who overcame obstacles and challenges in their lives to help make the Hubble Space Telescope a reality and share its discoveries with the world: https://t.co/q5TFljrVcG https://t.co/pJHkOHhq0k

#HubbleFriday Long ago gravity drew these 2 galaxies together. However, actual collisions between stars are very rare as stars are very small relative to the distances between them. Eventually the galaxies will fully merge to form a single, stable galaxy: https://t.co/PwHvlSoEW1 https://t.co/5PUcXp7BCL

This illustration shows the fundamental architecture of the Milky Way galaxy. Not shown is the halo of dark matter surrounding it. A survey that combines both Hubble and @ESAGaia data measured the total mass of our galaxy at 1.5 trillion solar masses: https://t.co/gUzKNJyfLT https://t.co/HBen3rItfB

NASA has recovered Hubble’s Advanced Camera for Surveys instrument, which suspended operations on Thursday, Feb. 28. The final tests were conducted and the instrument was brought back to its operational mode on March 6: https://t.co/msQQ1S5sFh

.@Google has launched some new NASA and Hubble exhibits on its @googlearts website! There you can find an interactive overview about Hubble, some highlights of the telescope’s many science discoveries, and tours of a few famous Hubble images: https://t.co/9RlvXBbP2P https://t.co/12CZJXY9Sq

#HubbleClassic This photo captures astronaut @Astro_Mike working on Hubble #OTD in 2002, during the 2nd spacewalk of Hubble's 4th servicing mission, with the curved, blue glow of Earth's atmosphere in the background. For more images from this mission: https://t.co/LmCTlqq6Bp https://t.co/kkhcixm491

RT @NASAblueshift: This might be the most unusual type of music you hear anywhere. Click to hear what happens when we translate the light captured in this gorgeous @NASAHubble image of a galaxy cluster… into sound! https://t.co/XWjexvMGvg https://t.co/xllp9jr1jx

At 8:31 pm EST on Feb 28th, the Advanced Camera for Surveys suspended operations when a problem occurred during a standard boot procedure. Hubble will continue to perform science with its other instruments while the anomaly is investigated: https://t.co/RBSAtBnyBG

Hubble's visible-light image of the Whirlpool Galaxy (M51) is a #HubbleClassic. But have you ever wondered what this galaxy might look like in other wavelengths of light? Find out in this video: https://t.co/4TQ1verPUf

#ICYMI Hubble recently captured this high-resolution mosaic of the spiral galaxy M33. Learn more about this nearby galaxy, which is the 33rd item in astronomer Charles Messier's catalog of easily observable night-sky objects: https://t.co/fhUyVNa1ai https://t.co/fWKdPnHeSB

#HubbleFriday We see two dominant elliptical galaxies near the center of the image. The gravity from the galaxy cluster where these galaxies reside is acting as a gravitational lens, allowing us to view the more distant galaxies sitting behind them: https://t.co/jyaZsr9ebM https://t.co/8JISzYS8jE

This is an artist's concept of Neptune's tiny moon Hippocamp. Only 20 miles across, it may actually be a broken-off fragment from a much larger neighboring moon, Proteus! Read the full story: https://t.co/OvX2MvjYzD https://t.co/eQMN7gACD5

#HubbleClassic Astronauts captured this photo of Hubble at the end of its 2nd servicing mission, after equipping it with 2 new instruments: the Space Telescope Imaging Spectrograph (STIS) and the Near Infrared Camera and Multi-Object Spectrometer (NICMOS). https://t.co/Tik67TheU0 https://t.co/zUPjtTJIK8

Happy #PresidentsDay! To celebrate, we share this inspirational quote from President Gerald Ford, who signed the budget that officially started the Hubble Space Telescope project. https://t.co/MNrmXVnmqO

#HappyBirthday to Galileo Galilei who was born on this day in 1564! His observations revolutionized the field of astronomy including his discovery of Jupiter's four largest moons. This video shows 3 of the 4 "Galilean moons" as observed by Hubble in 2015: https://t.co/IRw7oGfTGH https://t.co/tsolgB9sNM