Astronaut photos of Earth from space are undeniably amazing, but snapshots of inner space — particularly human cells — can be spectacular, too.
A new photo of human cells in space taken on the International Space Station looks more like art than science. The image, titled "Goldfinger" by scientists, reveals a monocyte immune cell as a hauntingly translucent, reddish-orange object tipped with green accents.
The human cell photo in space was taken on the station under "simulated gravity" conditions using the European Space Agency's Kubik incubator, which includes a centrifuge to mimic gravity in the weightlessness of space, ESA officials said in an image description.
To create the image, the cells were placed on gold-coated slides. As the cells grew, they removed the gold coating, which allows scientists to measure their movement in space. Antibodies in the cells designed to shine under a fluorescence microscope to track proteins created the photo's strange colors.
"Some cells, such as those in muscles and our immune system, are mobile. Others, such as those in our bones, are fixed," ESA officials said in a statement. "Knowing how spaceflight affects the mobility of cells is important for astronauts and mission designers."
On Earth, the mobility of a body's cells is dependent on each cell's cytoskeleton —the internal cell structure. Experiments in space, however, have revealed that cytoskeleton changes in orbit lead to reduced cell mobility.
"This process may be one of the reasons why astronauts suffer from weakened immune systems when living in space," ESA officials explained.
Scientists hope studies of immune cells in space, will help lead to countermeasures for astronauts on long-duration space station flights, and even longer deep-space missions in the future.
The European Space Agency is one of five space agencies that built the International Space Station. The space agencies of the United States, Russia, Canada and Japan are the other organizations. Construction of the $100 billion orbiting lab began in 1998. It has been manned by rotating crews of astronauts and cosmonauts since 2000.
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Tariq is the Editor-in-Chief of Space.com and joined the team in 2001, first as an intern and staff writer, and later as an editor. He covers human spaceflight, exploration and space science, as well as skywatching and entertainment. He became Space.com's Managing Editor in 2009 and Editor-in-Chief in 2019. Before joining Space.com, Tariq was a staff reporter for The Los Angeles Times covering education and city beats in La Habra, Fullerton and Huntington Beach. In October 2022, Tariq received the Harry Kolcum Award for excellence in space reporting from the National Space Club Florida Committee. He is also an Eagle Scout (yes, he has the Space Exploration merit badge) and went to Space Camp four times as a kid and a fifth time as an adult. He has journalism degrees from the University of Southern California and New York University. You can find Tariq at Space.com and as the co-host to the This Week In Space podcast with space historian Rod Pyle on the TWiT network. To see his latest project, you can follow Tariq on Twitter @tariqjmalik.