#Sentinel3 update: The countdown rehearsal was completed successfully today. Liftoff set for 17:57 GMT (19:57 CEST) on Wednesday 25 April. — ESA (@esa) April 22, 2018

"…People think Mars is a plan b, but Earth needs to be a plan A. If we can land on a comet, maybe we can work to fix climate change […]

Session 2 up next at #SpaceRocks in London – Science Fiction vs. Space Fact. Follow @spacerockslive for all the details! https://t.co/Sus6p0SGtz — ESA (@esa) April 22, 2018

A great day for meeting one of my personal heroes. Looking forward to 2nd session of #spacerocks with @DrBrianMay pic.twitter.com/RbQizidxUi — Tim Peake (@astro_timpeake) April 22, 2018

Not every day I can hang with a great astronaut and a great guy !!! Tim Peak !!! Hurrah ! SPACE… https://t.co/le8ldYhHi6 — Dr. Brian May (@DrBrianMay) April 22, 2018

In the vastness of space sits beautiful, blue planet Earth, the only place that can provide everything we need. Let’s be good stewards of our only home. Happy Earth Day! […]

At the roof of the Himalayas studying climate for the @ESA Climate Change Initiative #EarthDay #makalu pic.twitter.com/KlABM5jGRz — ESA Climate Office (@esaclimate) April 22, 2018

Henderson island, South Pacific Ocean: home to one of the world's best remaining elevated coral atoll ecosystem & tons of plastic. #EarthDay #EndPlasticPollution https://t.co/ETxFp3dmIU pic.twitter.com/iS3FBmztz2 — ESA EarthObservation (@ESA_EO) April […]

See more about @astro_timpeake's dizziness experiment here: https://t.co/LgGymMGtsS — ESA (@esa) April 22, 2018