Which social media campaign by an astronomy organization generated the highest engagement in history, reaching over 2 billion views in 2019?

The astronomy industry has transformed dramatically in the digital age, with observatories, telescope manufacturers, and space agencies leveraging social media to engage the public in celestial wonders. From live-streamed meteor showers to viral galaxy images, these organizations have pioneered innovative social media strategies that have revolutionized public engagement with space science. Test your knowledge about how astronomy brands connect with audiences through strategic digital marketing!

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NASA's #FirstBlackHole campaign featuring the first-ever image of a black hole
ESO's #StellarSelfie campaign encouraging astrophotography submissions
SpaceX's #MarsVision campaign showcasing simulated Martian colony designs
Celestron's #BackyardCosmos campaign featuring amateur telescope discoveries