#Ariane5 launch countdown currently on hold, waiting for update from Kourou https://t.co/vczsXfrb0h — ESA (@esa) May 4, 2017

Launch window #Ariane5 #VA236 now opens at 22:55 CEST/20:55 GMT due to fuelling delays https://t.co/vczsXfrb0h — ESA (@esa) May 4, 2017

15 mins to launch of #Ariane5 flight #VA236 with dual satellite payloadWatch live via @Arianespace https://t.co/vczsXfrb0h pic.twitter.com/MFwsJDTlqx — ESA (@esa) May 4, 2017

The final frontier of the Frontier fields: galaxy cluster Abell 370 in more detail than ever before: https://t.co/73gPQo78K2 pic.twitter.com/v4ZBKb5KI0 — ESA Science (@esascience) May 4, 2017

The Exp 51 crew was back at work Thursday researching how living in space weakens bones and alters DNA. https://t.co/Ecc9m07KlI pic.twitter.com/FhI6TkridC — Intl. Space Station (@Space_Station) May 4, 2017

WATCH tonight's #Ariane5 #VA236 launch! Liftoff is at 20:31 UTC, streaming starts at 20:15 UTC on @Arianespace https://t.co/vczsXfrb0h pic.twitter.com/QlfJ2KuV4d — ESA (@esa) May 4, 2017