BMAC 2018
BMAC 2018
BMAC 2017
BMAC 2017
BMAC 2015
BMAC 2015
KNVWS 't Gooi Lezingen
KNVWS 't Gooi Lezingen
Ancient Observatory, Beijing & Imperial Palace/Forbidden City
Ancient Observatory, Beijing & Imperial Palace/Forbidden City
Jantar Mantar Observatory Jaipur, India
Jantar Mantar Observatory Jaipur, India
Pradines Fall 2013
Pradines Fall 2013
Apenheul 2013
Apenheul 2013
Sterrenkijkavonden Okt 2012
Sterrenkijkavonden Okt 2012
BMAC Reunion 2012
BMAC Reunion 2012
Pradines Fall 2012
Pradines Fall 2012
#AndreTweetup May 29, 2012
#AndreTweetup May 29, 2012
ESA/DLR Spacetweetup
ESA/DLR Spacetweetup
Spacetweetup ESTEC
Spacetweetup ESTEC
Speyer-Bonn Pre-#Spacetweetup
Speyer-Bonn Pre-#Spacetweetup
STS-135 Tweet-up Day 3 Space Center Houston
STS-135 Tweet-up Day 3 Space Center Houston
STS-135 JSC Tweet-up (1)
STS-135 JSC Tweet-up (1)
2011 - 2024 Astrophotography
2011 - 2024 Astrophotography