Chandra X-ray Observatory

Since its deployment on July 23, 1999, NASA’s Chandra X-ray Observatory has helped revolutionize our understanding of the universe through its unrivaled X-ray vision.

Fifteen years ago, NASA’s Chandra was launched into space aboard the Space Shuttle Columbia.



It’s one of NASA’s current “Great Observatories,” along with the Hubble Space Telescope and Spitzer Space Telescope, is specially designed to detect X-ray emission from hot and energetic regions of the universe.

To celebrate Chandra’s 15th anniversary, four new images of supernova remnants – the Crab Nebula, Tycho, G292.0+1.8, and 3C58 – are being released. These supernova remnants are very hot and energetic and glow brightly in X-ray light, which allows Chandra to capture them in exquisite detail.

With its superb sensitivity and resolution, Chandra has observed objects ranging from the closest planets and comets to the most distant known quasars. It has imaged the remains of exploded stars, or supernova remnants, observed the region around the supermassive black hole at the center of the Milky Way, and discovered black holes across the universe. Chandra also has made a major advance in the study of dark matter by tracing the separation of dark matter from normal matter in collisions between galaxy clusters. It is also contributing to research on the nature of dark energy.

Paul Hertz, NASA’s Astrophysics Division director in Washington, said:



“Chandra changed the way we do astronomy. It showed that precision observation of the X-rays from cosmic sources is critical to understanding what is going on. We’re fortunate we’ve had 15 years – so far – to use Chandra to advance our understanding of stars, galaxies, black holes, dark energy, and the origin of the elements necessary for life.”

Chandra orbits far above Earth’s X-ray absorbing atmosphere at an altitude up to 139,000 km (86,500 mi), allowing for long observations unobscured by Earth’s shadow. When it was carried into space in 1999, it was the largest satellite ever launched by the shuttle.

Belinda Wilkes, director of the Chandra X-ray Center (CXC) in Cambridge, Massachusetts, said:

“We are thrilled at how well Chandra continues to perform. The science and operations teams work very hard to ensure that Chandra delivers its astounding results, just as it has for the past decade and a half. We are looking forward to more ground-breaking science over the next decade and beyond.”

Martin Weisskopf, Chandra Project Scientist at the Marshall Space Flight Center in Huntsville, Ala, said:

“Chandra continues to be one of the most successful missions that NASA has ever flown as measured against any metric – cost, schedule, technical success and, most of all, scientific discoveries. It has been a privilege to work on developing and maintaining this scientific powerhouse, and we look forward to many years to come.”

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