I’m an astrophysicist mapping the universe with data from the Chandra X-ray Observatory. Clear, sharp photos help me study energetic black holes Giuseppina Fabbiano When a star is born or dies, or ...

NASA is celebrating the 25th anniversary of its Chandra X-ray Observatory launch by sharing never-before-seen photos of the largest known spiral galaxy in the universe. The Chandra X-ray observatory ...

When a star is born or dies, or when any other very energetic phenomenon occurs in the universe, it emits X-rays, which are high-energy light particles that aren’t visible to the naked eye. These ...

Images and spectra—charts showing the distribution of light across different wavelengths from an object—are the two main ways astronomers investigate the universe. Images tell them what things look ...