Spiral galaxy M 51 (total and polarized intensity), combined from data observed with the interferometric radio telescope Very Large Array (VLA, USA)  and the Effelsberg 100m single-dish radio telescope (Germany) at 5 GHz (6 cm wavelength). Optical background image: Hubble Space Telescope (Hubble Heritage Team) © A. Fletcher & R. Beck (MPIfR Bonn)	Spiral galaxy M 31 (total and polarized intensity), observed with the Effelsberg 100m telescope at  5 GHz (6 cm wavelength). © R. Beck & E.M. Berkhuijsen (MPIfR Bonn)
Interacting galaxy NGC 4569 in the Virgo Cluster (total and polarized intensity), observed with the Effelsberg telescope at 5 GHz (6 cm wavelength). © C. Chyzy (Jagiellonian Univ. Kraków)	Spiral galaxy NGC 6946 (polarized intensity), combined from data observed with the VLA  and the Effelsberg telescope at 5 GHz (6 cm wavelength). © R. Beck  (MPIfR Bonn)
Spiral galaxy M 33 (total and polarized intensity), observed with the Effelsberg telescope at 8 GHz (3.6 cm wavelength). © F. Tabatabaei (MPIA Heidelberg), R. Beck & M. Krause (MPIfR Bonn)	Barred galaxy NGC 1097 (polarized intensity) , observed with the VLA telescope at 5 GHz (6 cm wavelength). © R. Beck (MPIfR Bonn), A. Fletcher & A. Shukurov (Univ. Newcastle/UK)
Edge-on spiral galaxy NGC 891 (total and polarized intensity), observed with the Effelsberg telescope at 8 GHz (3.6 cm wavelength). Optical background image: CFHT/Coelum © M. Krause (MPIfR  Bonn)	Edge-on irregular galaxy NGC 4631 (total and polarized intensity), observed with the Effelsberg telescope at 8 GHz (3.6 cm wavelength). Optical background image: Misti Mountain Observatory © M. Krause (MPIfR Bonn)
All-sky polarization survey of the Milky Way at 1.4 GHz (20 cm wavelength), observed with the 20m DRAO (Canada) and 30m Villa Elisa (Argentina) radio telescopes. © M. Wolleben (DRAO), P. & W. Reich (MPIfR Bonn) and J.C. Testori (Villa Elisa)	Model of the large-scale structure of the magnetic fields in the Milky Way disk, derived from radio polarization surveys at 1.4 GHz (DRAO/Villa Elisa) and 22 GHz (WMAP) and rotation measures of extragalactic sources. © X. Sun (NAO Bejing) and W. Reich (MPIfR Bonn)
All-sky radio image at 62.5 MHz, obtained on 22 Aug 2011 from 1.3 sec observation time with the Effelsberg LOFAR station. The angular resolution is about 6°. The brightest radio sources Cas A, Cyg A and Sgr A are marked. © Jana Köhler and James Anderson (MPIfR Bonn)	All-sky circular polarization at 32 MHz with Jupiter on bottom right, obtained on 3 Aug 2012 from 1.3 sec observation time with the Dutch LOFAR station CS002. The degree of circular polarization is 57% at this frequency. © Jana Köhler and James Anderson (MPIfR Bonn)
Radio galaxy M 87 = Virgo A (total intensity, in colour), observed with LOFAR at 115–162 MHz and overlaid onto an optical image of the Sloan Digital Sky Survey. The size of the shown field is 19′ x 19′, the resolution is 21′′ x 15′′. © Francesco de Gasperin (Univ. Hamburg)	Spiral galaxy M 51 (total intensity, in colour), observed with LOFAR at 120–181 MHz with 20" resolution. © David Mulcahy (MPIfR Bonn / Univ. Southampton)
Crab pulsar-wind nebula, observed with the Dutch LOFAR stations at 115–150 MHz. The resolution is 9′′ x 14′′, the field size 7.5′ x 6′. ©  Olaf Wucknitz (MPIfR Bonn)