NASA astronaut Jessica Meir captured a striking view of the Ucayali River snaking through the Amazon rainforest from the International Space Station, and the image was identified as the NASA picture of the day on April 30, 2026. The river, which runs through central Peru, cuts a dark ribbon through dense green forest in a photograph that turns a remote waterway into the day’s most immediate Earth image.
The Ucayali is thought to be one of the main sources of the Amazon River and stretches more than 1,600 miles, or 2,700 kilometers, through a landscape that is home to a diverse indigenous population and wildlife ranging from pink dolphins to manatees, taricaya turtles, jaguars, giant river otters, catfish, monkeys, reptiles and birds. Meir reached the station aboard Crew-12, a SpaceX mission that launched this past February, and the four Crew-12 astronauts were welcomed by the Expedition 74 crew before beginning their roughly eight-month stay.
The river’s reach helps explain why images like this matter beyond their beauty. The Ucayali and the surrounding region continue to be hit by illegal logging and commercial fishing, pressures that have also shaped a place that was a hot spot during the rubber boom in the late 19th and early 20th centuries. Earth photographs from orbit, along with satellite imagery, are used to better understand the pace of deforestation and the broader effects of climate change.
That is what gives Meir’s image its force: it is not just a scenic pass over the rainforest, but a sharp reminder that one of the Amazon basin’s key arteries is still being altered on the ground, even as it is being watched from space.
