NASA’s Lucy spacecraft captured a placing picture of the asteroid Donaldjohanson throughout its shut flyby on April 20, 2025.
The snapshot reveals that the asteroid is an elongated contact binary – an object fashioned when two smaller our bodies merge after a collision.
This flyby marked a significant milestone as Lucy accomplished its second encounter in its deliberate 12-year journey throughout the photo voltaic system.
Understanding the Lucy asteroid mission
NASA’s Lucy spacecraft is on a daring journey to discover the Trojan asteroids – historical remnants of our photo voltaic system that share Jupiter’s orbit across the Solar.
Launched in October 2021 by scientists from the Southwest Analysis Institute, Lucy swings previous a complete of Earth 3 times, utilizing gravity assists to realize the pace and trajectory it wants to achieve its distant targets.
Over its 12-year mission, the spacecraft will go to eight asteroids, together with one in the primary asteroid belt and 7 Trojans, making it the primary mission to look at this distinctive inhabitants up shut.
The Trojans are time capsules from the photo voltaic system’s early days, and scientists consider they maintain important clues to how the planets fashioned and migrated.
By photographing their surfaces, analyzing their composition, and monitoring their motion, Lucy goals to unlock secrets and techniques about our cosmic origins.
Lucy’s busy highway forward
Over the subsequent a number of years, Lucy will go to a report variety of asteroids. It’s scheduled to move three asteroids in the primary asteroid belt and eight Trojan asteroids that journey in Jupiter’s orbit.
This journey presents a uncommon alternative to check these time capsules from the formation of our planets.
Final month, April 20 marked a giant second for the staff as Lucy accomplished its second flyby. The spacecraft’s subsequent vacation spot is the Trojan asteroid Eurybates and its small satellite tv for pc Queta, with the encounter set for August 2027.
Every cease alongside the way in which brings scientists nearer to understanding how the photo voltaic system grew and developed.
The story behind Donaldjohanson’s title
The Lucy spacecraft is known as after the fossilized skeleton of a prehuman ancestor from East Africa, famously often known as “Lucy.” It carries ahead the spirit of discovery that the fossil represents.
Throughout this newest flyby, NASA made historical past by visiting a planetary physique named after a dwelling individual – a primary for the company.
The asteroid Donaldjohanson obtained its title solely after changing into one in all Lucy’s targets. It was named to honor Dr. Donald Johanson, the paleoanthropologist who found the unique Lucy fossil in Ethiopia.
His work reshaped how we perceive human evolution, and now his legacy travels by means of area alongside a brand new period of exploration.
“Asteroid Donaldjohanson has strikingly difficult geology,” famous Hal Levison, principal investigator for Lucy at Southwest Analysis Institute.
“As we research the advanced constructions intimately, they may reveal essential details about the constructing blocks and collisional processes that fashioned the planets in our Photo voltaic System.”
Seeing the previous by means of Lucy’s eyes
Lucy’s journey has simply begun. The spacecraft continues to cruise by means of area with a full listing of locations forward.
Every asteroid it encounters will provide extra items to the grand puzzle of how our photo voltaic system got here to be.
By means of Lucy’s eyes, we’re seeing the remnants of the previous, stitched collectively in rock and ice.
It’s a journey that not solely charts the traditional historical past of our cosmic neighborhood but additionally reminds us of the human drive to discover – from Earth’s earliest ancestors to the distant edges of the photo voltaic system.
Significance of small asteroids
At first look, asteroids like Donaldjohanson may appear small and unremarkable in comparison with the large planets or dazzling moons of the photo voltaic system.
However for scientists, these smaller our bodies maintain a number of the most essential clues about how every part we see at the moment got here to be.
Asteroids are sometimes described as “fossils” of the photo voltaic system. They’ve remained comparatively unchanged for billions of years, preserving the circumstances and supplies from the time when planets have been nonetheless forming.
Learning them is like opening a time capsule. Each rock, each crater, and each floor texture tells a narrative about historical collisions, chemical adjustments, and the forces that formed our cosmic neighborhood.
Insights into the early photo voltaic system
The contact binary form of Donaldjohanson additionally raises attention-grabbing questions. Contact binaries are fashioned when two separate our bodies slowly come collectively below mutual gravitational forces.
Understanding how and when this occurs might reveal new insights in regards to the early chaotic days of the photo voltaic system, when collisions have been widespread and the constructing blocks of planets have been nonetheless gathering.
Lucy’s mission goes far past simply taking footage. Scientists will analyze the colours, floor compositions, and constructions of those asteroids to search for patterns.
They need to discover out why some asteroids are darker, why some are wealthy in metals, and why others appear virtually untouched for the reason that starting.
Every asteroid provides one other piece to the bigger puzzle of how the Earth, the opposite planets, and even life itself finally emerged.
The discoveries that Lucy makes over the approaching years might reshape what we find out about our origins. It’s a reminder that typically, the smallest and most distant locations maintain massive secrets and techniques.
Data for this text comes from NASA.
Picture credit score: NASA/Goddard/SwRI/Johns Hopkins APL/NOIRLab
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