Submitted by chandra on Tue, 2024-07-23 15:12
Twenty-five years ago, the Space Shuttle Columbia launched into space carrying the Chandra X-ray Observatory. Press releases from the Chandra X-ray Center, CfA, and Smithsonian shared 25 new images with Chandra data to publicize this momentous milestone. A dedicated webpage to Chandra’s 25th birthday, plus the new images and press release, can be found at https://chandra.si.edu/25th/
Submitted by chandra on Mon, 2024-07-22 12:04
This montage contains 25 new images with data from NASA’s Chandra X-ray Observatory that is being released to commemorate the telescope’s 25th anniversary in space, as described in our latest press release. Since its launch into space on July 23, 1999, Chandra has been NASA’s flagship mission for X-ray astronomy in its fleet of “Great Observatories.” Chandra discovers exotic new phenomena and examines old mysteries, looking at objects within our own Solar System out to nearly the edge of the observable Universe.
Submitted by chandra on Thu, 2024-07-18 14:00
Submitted by chandra on Thu, 2024-07-11 10:11
The guest blogger for this post is our own Dr. Kimberly Arcand, Visualization Lead and Emerging Technology Scientist for the Chandra X-ray Center. Kim has been working with Chandra since before the telescope’s launch and has been at the forefront of bringing Chandra data to the public in innovative ways. Some of her recent collaborations include the Chandra sonification project. In addition to being a NASA project, Chandra is also part of the Smithsonian Institution (the telescope is operated by the Smithsonian Astrophysical Observatory in Cambridge, Mass.) That connection led to a new collaboration, described below, between Kim and Mickey Hart, the Grateful Dead, and Dead and Company, drummer and artist.
Westerlund 2
Credit: NASA/CXC/SAO & NASA/STScI
There is an inherent connection between music and space. There’s no rift between science and art, just a riff. They are two sides of the same coin, more alike than different.
Submitted by chandra on Fri, 2024-06-28 13:34
On Saturday, June 22, Chandra’s 25th anniversary shone as part of the Smithsonian’s Cosmic Journey initiative, with events across SI's Solstice Saturday. During Solstice Saturday, SI museums on the Mall stay open late and host special programs and performances.
The event drew record-breaking audiences with many tens of thousands of people over the course of the day, braving the DC heat to enjoy a day and evening of astronomy.
Chandra content was featured at multiple museums including Air & Space, Natural History, Arts & Industries, African American History & Culture, and Hirshhorn, for example. The installations included Chandra sonifications and large scaled image projects, trivia, handouts, 3D prints, and a documentary world premiere of "Listen to the Universe" from Chandra and NASA+.
Submitted by chandra on Wed, 2024-06-19 11:16
Our guest blogger this week is Jessica Jacyno. Jacyno is an engineering student at Brown University from Sweetwater, Tennessee. She is passionate about the interplay between international policy and science.
As an engineering student, I am taught to take advantage of the laws of physics to accomplish humanity’s goals. Before that though I am a student of the cosmos, intent on staring up at the night sky to unravel the secrets of our origins. Until taking classes on astrophysics at university, my focus had always been on the results, not the tools used to achieve such results. Telescopes always seemed like complex black boxes that were out of my paygrade to understand. After all, if they were producing discoveries why did I care how they were found?
However, learning about these means of discovery is akin to learning about the history of the past to inform our present. Not only is the technology deeply intriguing (and not as unfathomable as you would think), but there is much to be learned from the way in which complex problems like space visualization are approached and solved. These approaches and solutions should serve to inform every type of problem solving across disciplines that requires critical thinking.
Submitted by chandra on Tue, 2024-06-11 09:57
Before the first pitch of the Red Sox game on June 5th, over 3,000 local New England students were treated to a morning of STEM (“science, technology, engineering and math”) programs for the Red Sox NASA STEM Day. As local representatives of NASA in New England, the Smithsonian Astrophysical Observatory (SAO), including Chandra, had a huge presence and helped to celebrate the Chandra telescope’s 25th anniversary!
Submitted by chandra on Fri, 2024-05-31 10:35
Dr. Harvey Tananbaum receiving the NASA Distinguished Public Service Medal
Credit: NASA/Glenn Research Center
On March 28, 2024, Harvey Tananbaum was awarded the NASA Distinguished Public Service Medal during a ceremony at the Glenn Research Center in Cleveland, Ohio.
Dr. Tananbaum was recognized for his distinguished career that has made X-ray astronomy a bedrock observational discipline for the advancement of astrophysics, and his leadership in NASA X-ray space telescopes like the Chandra X-ray Observatory made NASA the world leader in X-ray astronomy missions.
The citation for this award highlights his “outstanding contributions to NASA’s science mission through key roles in pioneering X-ray astronomy missions that have revolutionized our understanding of the universe.”
Shown left to right in this photo: James Free (NASA Associate Administrator), Harvey Tananbaum (SAO/CXC), Casey Swails (NASA Deputy Associate Administrator)
- Megan Watzke
Submitted by chandra on Wed, 2024-05-29 16:13

Credit: Smithsonian
Did you know that the Smithsonian has a podcast? It’s called Sidedoor and it gives listeners a behind-the-scenes look into the Smithsonian’s museums and research units. One of those research units is the Smithsonian Astrophysical Observatory, which has run NASA’s Chandra X-ray Observatory since before launch and continues to control its flight and science operations to this day.
On the latest episode of Sidedoor, Dr. Kimberly Arcand (Chandra’s visualization scientist and emerging tech lead), along with Dr. Priyamvada Natarajan (astrophysicist, and professor at Yale University) and Dr. Arthur I. Miller, (scientist and author), discuss black holes and the connection to Dr. Subrahmanyan Chandrasekhar, the namesake of the Chandra X-ray Observatory. Listen to the first installment of this two-part journey through the cosmos at https://www.si.edu/sidedoor/cosmic-journey-i-stellar-buffoonery
Submitted by chandra on Mon, 2024-04-22 15:21
The Chandra Source Catalog (CSC) is the definitive catalog of X-ray sources detected by the observatory. The latest version, known as CSC 2.1, was released in early April 2024.
Since the Uhuru satellite in the 1970s, X-ray astrophysics missions have a tradition of publishing detailed catalogs of the X-ray sources detected along with a list of key physical properties.
CSC 2.1. carries this tradition forward. Below is an adapted announcement from members of the team who worked on this important resource for the scientific community:
The Chandra X-ray Center (CXC) is pleased to announce the availability of Release 2.1 of the Chandra Source Catalog (CSC 2.1). This catalog covers roughly 730 square degrees of sky and contains 407,806 unique X-ray sources and over 1.3 million individual source detections identified in more than 15,000 Chandra imaging observations released publicly prior to the end of 2021.
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