The overview effect is a cognitive shift reported by some astronauts while viewing the Earth from space. Researchers have characterized the effect as "a state of awe with self-transcendent qualities, precipitated by a particularly striking visual stimulus". The most prominent common aspects of personally experiencing the Earth from space are appreciation and perception of beauty, unexpected and even overwhelming emotion, and an increased sense of connection to other people and the Earth as a whole. The effect can cause changes in the observer's self concept and value system, and can be transformative. Immersive virtual reality simulations have been designed to try to induce the overview effect in earthbound participants.
Characteristics
Broadly, Yaden et al. (2016) state that the most prominent common aspects of the astronauts' experience were appreciation and perception of beauty, unexpected and even overwhelming emotion, and an increased sense of connection to other people and the Earth as a whole. Yaden et al. proposed that the overview effect can be understood in terms of awe and self-transcendence, which they describe as "among the deepest and most powerful aspects of the human experience". More specifically, they write that the effect might best be understood as "a state of awe with self-transcendent qualities, precipitated by a particularly striking visual stimulus". Yaden posited that the overview effect triggers awe through both perceptual vastness (like seeing the Grand Canyon) and conceptual vastness (like contemplating big ideas like infinity).
Yaden et al. (2016) write that some astronauts viewing Earth from space "report overwhelming emotion and feelings of identification with humankind and the planet as a whole". The effect can cause changes in the observer's self concept and value system, and is sometimes transformative. Voski (2020) demonstrated a marked influence on astronauts' environmental attitudes and behaviors, and a new level of environmental awareness and consciousness. Though astronaut Leland Melvin said the effect seems to take hold of astronauts regardless of culture or nation of origin, Yaden et al. observed that cultural differences, including differences in religious and social identity, affect the ways in which the effect is experienced and interpreted. Expressions range from the religious, to the "vaguely spiritual", to the naturalistic, to calls to social duty.
Author Frank White, who in the 1980s coined the term overview effect after interviewing many astronauts, said that the overview effect is "beyond words", requiring experience to understand, even likening it in this regard to Zen Buddhism. He said that astronauts' very first views of the planet were generally very significant, adding that some experience the effect "in a moment" while in others it grows over time; and generally that the effect "does accumulate".
Not all astronauts experience the overview effect. Further, White distinguished experiences in low Earth orbit where the planet takes up most of an astronaut's view, from experiences on the Moon in which one sees the whole Earth "against a backdrop of the entire cosmos". He described a "big difference" between professional astronauts, who are focused on their missions—versus people who have recently been going into space "with an intention to have an experience" and who may already be aware of the overview effect.
Alternative characterizations Beginning in the 2010s, science historian Jordan Bimm argued against White's interpretation that the overview effect is, in Bimm's words, "a reliably produced mental effect—a naturally occurring phenomenon between the environment and the human mind". Instead, Bimm asserts that the effect is "both a natural and cultural object" that is variable over particular individuals, divergent cultures, and different time periods. Preliminarily, Bimm noted that studies of early test pilots' negative-experience break-off phenomenon ended in 1973 (displaced by White's "positive conversion narrative"), that astronauts in a "lie to fly" culture feel career pressure to avoid reporting negative psychological reactions, and that individuals already aware of the overview effect may make it a self-fulfilling prophecy. He posited that it was Cold War and mastery-of-Earth mentalities of Western technological supremacy that contributed to the rise of borderless-world concepts such as the Gaia hypothesis, spaceship Earth, and the Blue Marble.
Bimm expressed concern over White's perception that the effect embodies a natural imperative for humans to pursue space travel and colonization, Bimm saying the attitude resembles the 18th-century American colonialist, expansionist concept of manifest destiny. Bimm warned of hubris underlying a perception of having achieved a new level of enlightenment that he called the "overlord effect".
History
English astronomer Fred Hoyle wrote in 1948 that, "once a photograph of the Earth, taken from the outside, is available, a new idea as powerful as any in history will be let loose". After Apollo 8 astronaut William Anders' December 1968 Earthrise photograph of the Earth from lunar orbit, the Apollo missions were credited with inspiring the environmental movement, the first Earth Day being held in April 1970. Hoyle said that people suddenly seemed to care about protecting Earth's natural environment, though others attribute that awareness to Rachel Carson's 1962 book Silent Spring and reactions to several environmental disasters in the 1960s.
The term overview effect was coined by author and researcher Frank White, who said he thought he first had "a mild experience" of the effect while flying across the country and looking out the aircraft's window. That experience led him to imagine living in an O'Neill cylinder (habitat in space), which inspired him to become involved with the Space Studies Institute and begin speaking with astronauts.
White's astronaut interviews confirmed the importance of the difference between intellectual knowledge versus experience, of perceiving the "striking thinness of the atmosphere", of thinking of ourselves interconnected and part of the Earth as an organic system, and that we as different people "are all in this together". The first public use of the term was in a poster at a Space Studies Institute meeting in 1985. Eventually, White wrote about the effect in his book The Overview Effect — Space Exploration and Human Evolution (1987), which has a fourth edition (2021). White's work did not attain broad influence until the 2010s—a period of increased societal divisions and a new prospect of private space travel.
Accounts
Michael Collins, Yuri Gagarin, Ron Garan, Chris Hadfield, James Irwin, Mae Jemison, Scott Kelly, Ed Gibson André Kuipers, Jerry Linenger, Mike Massimino, Anne McClain, Leland Melvin, Edgar Mitchell, Sian Proctor, Rusty Schweickart, William Shatner, Nicole Stott, Ed Dwight, Cai Xuzhe, and Jeremy Hansen are among those reported to have experienced the effect.
Yuri Gagarin (Vostok 1; 1961) wrote, "Circling the Earth in a spaceship, I marveled at the beauty of our planet. People, let us preserve and increase this beauty, not destroy it!"
Michael Collins (Apollo 11; 1969) said that "the thing that really surprised me was that it [Earth] projected an air of fragility. And why, I don't know. I don't know to this day. I had a feeling it's tiny, it's shiny, it's beautiful, it's home, and it's fragile".
Edgar Mitchell (Apollo 14; 1971) described it as an "explosion of awareness" and an "overwhelming sense of oneness and connectedness... accompanied by an ecstasy... an epiphany".
Ed Gibson (Skylab 4; 1976) said "In no way could we on earth, or any group of people, or any country, consider ourselves isolated. [...] We're really all in this together".
One day before he died, Wubbo Ockels (STS-61-A; 1985) recorded a plea to the general public for environmental sustainability (which was the focus of his career after his spaceflight), mentioning the exceptional perspective that comes from observing Earth from space.
William Shatner (Blue Origin NS-18, 2021) said immediately after landing that, "Everybody in the world needs to do this. [...] The covering of blue was... the sheet, this blanket, this comforter of blue that we have around us, we think, "Oh, that's blue sky." And then [...] you shoot through it all of a sudden, as though you whip off a sheet off you when you're asleep, and you're looking into blackness, into black ugliness, and you look down. There's the blue down there, and the black up there and it's... There is mother, and Earth, and comfort. And there is — is there death? I don't know. [...] It was so moving to me. This experience, it's something unbelievable."
Ed Dwight (Blue Origin NS-25, 2024) reflected after his suborbital spaceflight, "Out the window, I could see the Earth. Everything looked ordered and neat and wonderful and beautiful. There was no separation between countries or states. And you ask yourself: As wonderful as it all is, why can't the people who live on it get along? Why don't they want to take care of such a beautiful place?"
When Cai Xuzhe (Shenzhou 19, 2024–2025) returned to Earth after six months of living on China's space station he said, "In space, we gazed at the beautiful blue planet countless times. This is the common home for humanity and needs to be protected by all of us together."
During the April 2026 Artemis II lunar circumnavigation mission, a NASA tweet coined the term Moon joy as "the feeling of intense happiness and excitement that only comes from a mission to the Moon". Astronaut Jeremy Hansen said that the experience reaffirmed his belief that human life had the purpose of finding "the joy in lifting each other up by creating solutions together instead of destroying", and that the view from space was "almost like seeing living proof" of that.
Lasting impact Researchers have recognized that awe-based experiences—such as interaction with nature, religious or spiritual or mystical experiences, meditation, and peak and flow experiences during high task performance—can change a person and promote the feeling of unity or interconnectedness. Gallagher et al. (2015) defined a set of consensus categories for awe that included being captured by the view or drawn to the phenomenon, experiences of elation, desiring more of the experience, feeling overwhelmed, and scale effects – feelings of the vastness of the universe or of one's own smallness when faced with that vastness. Besides being an enjoyable experience, such phenomena can have short and long-term positive outcomes such as increased well-being, pro-social and pro-environmental attitudes, and improved physical health. The self-transcendent experience can cause long-term changes in personal outlook, and can influence peoples' very sense of self by affecting their self-schema ("the particular framework through which (people) imagine themselves in relation to the world").
Specifically, Frank White noted that upon return, some astronauts became involved in humanitarian activities, or became artists, with astronaut Edgar Mitchell founding the Institute of Noetic Sciences. Though Yaden et al. (2016) noted that the experience can be transformative, White said in 2019 that generally there was no "dramatic transformation" or "marching in peace parades"; that the lasting effect was more subtle.
A 2018 questionnaire survey of 39 astronauts and cosmonauts found that humanistic changes predominated over spiritual changes. In particular, the survey found a moderate degree of change in the Perceptions of Earth subscale (Earth as "a beautiful, fragile object to be treasured"), which significantly correlated with subsequent involvement in environmental causes. In contrast, the survey found "no to very small change" in the Spiritual Change subscale, which the researchers said likely reflected established pre-launch values.