James-Webb-Teleskop: Erstes Bild von Hubble-Nachfolger da!
Observations of the isotropic diffuse gamma-ray emission with the Fermi Large Area Telescope Markus Ackermann SLAC National Accelerator Laboratory on behalf. - ppt download
Marseille | Markus Jalkanen | Flickr
Dörr Telescope AC 60/910 Merkur 60 AZ-2
Dörr Telescope AC 60/910 Merkur 60 AZ-2
Danubia Merkur 60a Refracter Astro Telescope for sale online | eBay