Abell 39 is a planetary nebula with low surface brightness in the constellation Hercules. It shines predominantly in the blue light of the double ionized atomic oxygen [OIII]. It is assumed that the nebula is about 6800...
23. July 2019
The importance of active telescope training
American scientists point to a problematic development in observational astronomy. Large telescopes have enabled novel research activities that were previously unthinkable, including the provision of large datasets. As...
17. July 2019
Complete observatory donated
Frau Brigitte Thome-Bode from Hannover donated the complete observatory of Hans-Joachim Bode to the STScI. The first-class ensemble of several lens and reflector telescopes, a very heavy mount (we now know how the...
7. July 2019
The Dumbbell Nebula M 27
The Dumbbell Nebula M 27 is an extraordinarily large planetary nebula, not only because it is not even 1,000 light years close to us, but also because it has a considerable real extension of about 2.5 light years...
7. July 2019
