Cheomseongdae observatory — Gyeongju, North Gyeongsang province, South Korea
Photo Credit: By by Junho Jung at Flickr from South Korea - https://www.flickr.com/photos/phploveme/2486733694, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=7849060

Queen Seondeok of Silla —
Photo Credit: https://keerissima.wordpress.com/2010/04/12/painting-of-the-real-queen-seon-deok/

Pre-Later Silla at its height in the 6th century — Korean peninsula
Photo Credit: By solicitatia - 나무위키, CC0, https://commons.wikimedia.org/w/index.php?curid=103633507

Gwanbunghwan brass and gold dragon crown — displayed at Gyeongju National Museum
Photo Credit: By Cultural Heritage Administration - [1], KOGL Type 1, https://commons.wikimedia.org/w/index.php?curid=37909068

question mark avatar —
Photo Credit:

"Arecibo answer" crop circle —
Photo Credit: https://temporarytemples.co.uk/crop-circles/2001-crop-circles/2001_08_20_the-message-chilbolton-radio-telescope-hampshire-wheat-oh-35mmneg

graphic of Arecibo message — This is a demonstration of the message with color added to highlight its separate parts. The binary transmission sent carried no color information.
Photo Credit: By Arne Nordmann (norro), CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=365130

Carl Sagan —
Photo Credit: https://cosmos.fandom.com/wiki/Carl_Sagan

The 85-foot (26 m) Howard E. Tatel Radio Telescope at NRAO — used in Project Ozma
Photo Credit: By Z22 - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=52713652

UCSC & Santa Cruz aerial view — The Great Meadow is the undeveloped area between city and university
Photo Credit: By Doc Searls from Santa Barbara, USA - sba-cdg13.JPG, CC BY-SA 2.0, https://commons.wikimedia.org/w/index.php?curid=6396583

Original University of California seal —
Photo Credit: By probably Tiffany & Co,; Public Domain, https://commons.wikimedia.org/w/index.php?curid=29175425