HESS: project homepage / source of the month / twitter

CTA: project homepage / CTA Performance / Astropart. Phys. special issue / key science projects / twitter

Misc. astro: astro-ph / ADS / coordinate converter /  DESY-Zeuthen / Humboldt Foundation

Other: schwatzgelb / Karuna e.V. / lauterbautzner / last.fm / titanic-magazin / Weltspiegel / Wait But Why