NASA is kicking off a global selfie event for Earth Day.
Here’s how it works: Snap a photo of yourself, then post it on Twitter, Instagram, Facebook, Google+ or Flickr using the hashtag #GlobalSelfie.
NASA will use the photos to create a mosaic image of Earth.
The event is part of a NASA Earth science campaign called Earth Right Now.
Click here for more details and some photo idea inspiration on NASA.gov.