Space Telescope Science Institute

Mission Operations Center for NASA's Webb Space Telescope (#NASAWebb). Science operations for the Hubble Space Telescope and upcoming Roman Space Telescope.

[Space Telescope Science Institute @SpaceTelescope]

🚨 Our fascinating Public Lecture Series is now on YouTube! We now have the 2017-2025 lectures available to watch.
https://t.co/h3po4po4pB

[Space Telescope Science Institute @SpaceTelescope]

What was the universe like at the beginning of time, and how did it go from that to everything we observe with telescopes today? That was just one of the big topics discussed at the STScI spring symposium in Baltimore.

[Space Telescope Science Institute @SpaceTelescope]

Beautiful like diamonds in the sky! This video highlights globular cluster NGC 6723 (also called the Chandelier Cluster). This cluster sparkles with countless stars 27,000 light-years away in the constellation Sagittarius (the Archer).
https://t.co/7kUjI7j1ev

[Space Telescope Science Institute @SpaceTelescope]

Curious about what’s next for #NASARoman as it nears launch? The Roman blog is NASA's hub for the mission's launch updates, where all are invited for behind-the-scenes looks on Roman's road to launch and operations. https://t.co/cv3yMFkdUK

[Space Telescope Science Institute @SpaceTelescope]

AUGUST 11: Scientists will discuss the engineering behind #NASARoman’s lift-off and the path to its final destination, as well as the science potential to survey the heart of our Milky Way galaxy and find a variety of objects using innovative techniques.
https://t.co/60k0mq2cjl

[Space Telescope Science Institute @SpaceTelescope]

On July 27, technicians at Kennedy Space Center in Florida installed a memory card containing 1,350,144 names as part of a commemorative plaque on the Nancy Grace Roman Space Telescope. #NASARoman
https://t.co/scN0u6gNxd

[Space Telescope Science Institute @SpaceTelescope]

The prominence of the Whirlpool Galaxy’s spiral arms in this Hubble image is thought to be due to the gravitational interactions between its spiral arms and the companion galaxy at top right: https://t.co/0JuKjCsIGS

[Ori Fox❓ @fox_ori]

It's official! We at @SpaceTelescope are ready for @NASARoman.

[Space Telescope Science Institute @SpaceTelescope]

At STScI’s spring symposium in Baltimore, astronomers discussed some of the big questions being raised and explored with #NASAWebb.

[Space Telescope Science Institute @SpaceTelescope]

Considering the Saguaro case study, the team believes that little red dots may not be a unique galaxy population, but instead a temporary phase of highly active supermassive black holes. (4/4)
https://t.co/NlD03uDiuk

[Space Telescope Science Institute @SpaceTelescope]

What do little red dots become as the universe ages? It’s been a question since they were discovered in the high-redshift universe by #NASAWebb in 2022. With each new observation, astronomers have gradually learned more about the nature of these mysterious red sources. (1/4) 🧵

[Space Telescope Science Institute @SpaceTelescope]

Their conclusions are based on their analysis of lower-redshift spiral galaxy WISEA J123635.56+621424.2, nicknamed the “Saguaro” for its prominent arms, like the cactus native to the U.S. (3/4)

[Space Telescope Science Institute @SpaceTelescope]

On #NationalInternDay, we want to celebrate our 2026 Space Astronomy Summer Program students who spent their summer working with STScI researchers and staff! 🎉

Today they provided short presentations of their efforts at the SASP Symposium.

[Space Telescope Science Institute @SpaceTelescope]

The astronomers plan to continue analyzing the Hubble data and combine it with data from ground-based observatories to gain additional insights into the history of Andromeda. (6/6)
https://t.co/ANRLQHsFL6

[Space Telescope Science Institute @SpaceTelescope]

Hubble has conducted two gigantic surveys that combined to image about two-thirds of the Andromeda’s disk. Using that data, astronomers measured 200 million individual stars to tease out the history of star formation in our neighboring galaxy. (1/6) 🧵

[Space Telescope Science Institute @SpaceTelescope]

This movie, created from an analysis of data from Hubble, demonstrates how the rate of star formation in the Andromeda galaxy has declined over the past 500 million years. Brighter colors indicate where star formation was highest during a given time. (5/6)

[Space Telescope Science Institute @SpaceTelescope]

The countdown is on for the debut of the Nancy Grace Roman Space Telescope, named for NASA’s first chief astronomer.

The telescope is slated to launch on Aug. 30 aboard a SpaceX Falcon Heavy rocket from NASA’s Kennedy Space Center in Florida. #NASARoman
https://t.co/C3bVIkFq51