April 22
5 moments across history
New Horizons' Ultima Thule Encounter
NASA's New Horizons spacecraft flew past Ultima Thule, a primordial Kuiper Belt object beyond Pluto, providing unprecedented close-up data about the early solar system and expanding humanity's reach into deep space.
New Horizons' Ultima Thule Encounter
New Horizons' Ultima Thule Encounter
New Horizons' Ultima Thule Encounter
New Horizons' Ultima Thule Encounter — detail view
NASA's New Horizons spacecraft flew past Ultima Thule, a primordial Kuiper Belt object beyond Pluto, providing unprecedented close-up data about the early solar system and expanding humanity's reach into deep space.
2008 Beijing Olympic Games Overview
2008 Beijing Olympic Games Overview
2008 Beijing Olympic Games Overview — detail view
The Beijing Olympic Games opened with a major global spectacle, symbolizing China's arrival as a modern world power and showcasing international competition, ceremony, and cultural presentation on an enormous stage.
Rosetta Mission to Comet 67P/Churyumov–Gerasimenko
Rosetta Mission to Comet 67P/Churyumov–Gerasimenko
Rosetta Mission to Comet 67P/Churyumov–Gerasimenko — detail view
The European Space Agency's Rosetta mission became one of the most ambitious comet-exploration projects ever attempted, eventually orbiting and deploying a lander onto Comet 67P, transforming comet science and long-duration robotic exploration.
Sally Ride's Spaceflight Pioneers Women in STEM
Sally Ride's Spaceflight Pioneers Women in STEM
Sally Ride's Spaceflight Pioneers Women in STEM — detail view
Sally Ride's spaceflight marked a historic breakthrough for women in American space exploration, inspiring generations of scientists, engineers, and astronauts while widening the public imagination of who belongs in STEM.
Fall of Saigon and Vietnam's Unification
Fall of Saigon and Vietnam's Unification
Fall of Saigon and Vietnam's Unification — detail view
The final phase of the Vietnam War ended with the fall of Saigon and the unification of Vietnam, closing one of the defining geopolitical conflicts of the twentieth century and reshaping Southeast Asia and U.S. foreign policy.