About: Shari


Recent Posts by Shari

Jan 8

Day 14: Webb’s Deployment is Complete!!

From the spectacular Ariane 5 rocket launch on Christmas day to the deployment of the solar panels, sunshield, and secondary and primary mirrors, Webb has gone through a picture-perfect deployment.

Jan 6

Day 12: Cool Telescope Gets a Little Cooler

Webb’s cameras and spectrographs need to be cold. Really cold. They need to be so cold that engineers created specialized mechanisms to reduce their heat in addition to the shade provided by the large sunshield. One such mechanism is the Aft Deployable Instrument Radiator, or ADIR.

Jan 5

Day 11: We have a telescope!

Today’s excitement came directly from the NASA livestream of the Mission Operations Center at Space Telescope Science Institute during the deployment of Webb’s secondary mirror. Webb Program Manager Bill Ochs exclaimed, “We have a telescope!” as the latching process was confirmed, and the secondary mirror was fully deployed.

Jan 4

Day 10: Sunshield Deployment Complete!

From an engineering perspective, Webb’s sunshield was one of the most difficult challenges to overcome in building the telescope. Unlike other parts of the telescope, the sunshield layers are very thin and easily damaged. How could the sunshield be safely and efficiently stored, and then deployed without tearing?

Jan 3

Day 9: A Pause, and then Sunshield Tensioning Begins

The year 2021 ended for the Webb Telescope in a nominal way. “Nominal” is spacecraft lingo for “everything is going just as it should” and that’s great! Both sides of the telescope’s sunshield’s booms (arms) were pulled out without any problems.

Jan 3

Željko Ivezić

Director, Rubin Observatory Construction Željko Ivezić received undergraduate degrees in mechanical engineering and physics from the University of Zagreb, Croatia, in 1990 and 1991, and his Ph.D. in physics from the University of Kentucky in 1995. He worked on the Sloan Digital Sky Survey (SDSS) at Princeton University and then was a Professor at the University of […]

Dec 31

Day 6: Sunshield Booms begin to deploy

Today saw the beginning of one of the most difficult Webb deployments so far, the sunshield rollout. The Webb telescope observes in ultraviolet light and needs to be kept very cold in order to collect the faint light from distant galaxies. A key component to keep the telescope cold is Webb’s sunshield. This large structure, the size of a tennis court, is made up of 5 layers of very thin material.  

Dec 30

Day 5: Webb’s Aft Momentum Flap and Sunshield Covers Deployed

The Webb team at the Mission Operations Center (MOC) at Space Telescope Science Institute (STScI) in Baltimore, Maryland started the day with an early morning deployment. The Aft Momentum Flap was successfully lowered into its final position. The deployment was finished at 9:00 am EST.

Dec 28

Day 3: Webb Sunshield Starts to Unfold

Unitized Pallet Structures (UPS) unfold. These two pallets (one forward and the other aft) hold the folded sunshield layers. The forward UPS went first. To prepare for the deployment, the spacecraft was maneuvered to provide warmer temperatures on the forward UPS and various heaters were activated to warm key deployment components. Key release devices were activated, and various electronics and software were configured. NASA announced successful deployment of the forward pallet at 1:51 eastern today.

Dec 28

Launch to Day 2

Webb already passed several milestones since its spectacular launch last Saturday. It separated from the Ariane 5 rocket, unfolded its solar panels, and completed two engine burns to adjust its course. It also unfolded its gimbaled antenna for better communications.

Dec 21

NOIRLab: Largest Collection of Free-Floating Planets Found in the Milky Way

Using observations and archival data from several of NSF’s NOIRLab’s observatories, together with observations from telescopes around the world and in orbit, astronomers have discovered at least 70 new free-floating planets — planets that wander through space without a parent star — in a nearby region of the Milky Way.


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