It is a faint green bubble in the white box near the bottom center of the image. (hubblesite.org)
Also includes a mini green bubble challenge which acts as a form of assessment at the end of the week's teaching to assess what the children have learnt and retained. (tes.com)
Outfit Details: Top: Annalee + Hope lime green / grey blouse, consignment store for $ 10 Bottom: David Kahn stretchy skinny jeans, Ideeli clearance $ 30 Jewelry: lime green bubble necklace, ebay for $ 15 + gifted earrings Bag: Brown leather Lamarthe tote, thrifted $ 3 + my polka dot silk scarf Shoes: Lands End black ballet flats, thrifted $ 5 (sandpaperkissesblog.com)