It's been 20 years since NASA's Chandra X-Ray Observatory launched to give us the sharpest-ever view of X-rays — and the telescope is still working at the frontier of science, the agency said.
It's been 20 years since NASA's Chandra X-Ray Observatory launched to give us the sharpest-ever view of X-rays — and the telescope is still working at the frontier of science, the agency said.