1. Chandra supplements the Compton Gamma Ray Observatory and the Hubble Space Telescope. 2. These are neutron stars that put out steady flashes of gamma rays . 3. The Compton Gamma Ray Observatory joined the Hubble in orbit in 1991. 4. Remaining bits of gamma ray energy emerge as X-rays, or visible light. 5. They also obtained the first evidence that gamma rays can generate positrons. 6. Among other things, the gamma rays could severely damage Earth's ozone layer. 7. The germanium isotope emits two weak gamma rays and a conversion electron. 8. They then went on tour around the world with Gamma Ray again. 9. Gamma rays have the greatest energy of any form of electromagnetic radiation.10. Radioactive isotopes emitting gamma rays are used almost entirely for medical purposes.
