Liked on YouTube: How do we know it rains IRON on WASP-76b?

How do we know it rains IRON on WASP-76b?
There is an exoplanet, discovered by ESO's VLT, where it rains iron. But WASP-67b is 690 light years away, how could we possibly know that? SUBSCRIBE for more videos about our other planets. Subscribe! http://goo.gl/WX4iMN Facebook! http://goo.gl/uaOlWW Twitter! http://goo.gl/VCfejs Donate! Patreon: http://goo.gl/GGA5xT Ethereum Wallet: 0x5F8cf793962ae8Df4Cba017E7A6159a104744038 Become a Patron today and support Astrum! Donate link above. I can't do it without you. Patreons can help pick the next Astrum Answers in a fortnightly poll. Thanks to those who have supported so far! Astrum Spanish: https://bit.ly/2KmkssR Image Credits: NASA/Gemini/Sean Doran Music Credits: Stellardrone - Billions and Billions
via YouTube https://www.youtube.com/watch?v=gOWHigxX3S8