
These Ancient Asteroids Could Explain the Birth of Our Solar System
Special | 3m 26sVideo has Closed Captions
Trojan asteroids are mysterious space rocks that hold clues to the early solar system.
Back in 2021, Lucy set off to explore some of the oldest and most fascinating objects in our solar system—Trojan asteroids! These mysterious space rocks share Jupiter's orbit and hold clues to the early solar system. Star Gazers host Trace Dominguez takes us on a journey through Lucy’s groundbreaking mission and its discoveries.
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Star Gazers is presented by your local public television station.
Funding provided by The Batchelor Foundation and The William J. & Tina Rosenberg Foundation

These Ancient Asteroids Could Explain the Birth of Our Solar System
Special | 3m 26sVideo has Closed Captions
Back in 2021, Lucy set off to explore some of the oldest and most fascinating objects in our solar system—Trojan asteroids! These mysterious space rocks share Jupiter's orbit and hold clues to the early solar system. Star Gazers host Trace Dominguez takes us on a journey through Lucy’s groundbreaking mission and its discoveries.
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NASA's Lucy Mission is on# an epic road trip, one that will take it farther than any spacecraft of its kind has ever gone.
All# to visit a group of ancient space rocks that share an orbit with Jupiter that are called Trojans.# These Trojans might give us the details as to how our solar system began, maybe even life itself.# So, what exactly are these Trojans?
They're two huge groups of asteroids that orbit the sun along# with Jupiter.
One group ahead of the planet and one behind.
Think of them like space-time capsules# tagging along on Jupiter's orbit.
Scientists believe that these asteroids are leftovers from# the formation of our solar system over 4 billion years ago.
So studying them is like opening a# fossil record of the early solar system before planets like Earth even formed.
Enter NASA's Lucy# Mission, named after the famous Lucy fossil that helped scientists understand human evolution.
Just# like that fossil, the spacecraft could help us understand our own cosmic origins.
Lucy launched# in October 2021, beginning a 12-year journey that will take it on a grand tour of eight different# asteroids, one in the main asteroid belt between Mars and Jupiter and seven Trojans near# Jupiter's orbit.
It is an incredibly complex flight path.
Lucy will make multiple# passes near Earth to use gravity assists, which basically means it will use the planet's gravity# to slingshot itself further and faster into the solar system each time.
Also, Lucy is equipped# with ultra-precise instruments to study the shape, composition, and surface of each of the asteroids# it plans to visit.
It has high-resolution cameras to map the terrain and craters of the# asteroids; spectrometers to determine what minerals and ices the asteroids are made of; and# thermal sensors to measure surface temperatures and properties of each one.
All of this data will# help scientists piece together how these ancient bodies formed and what they might be able to tell# us about the earliest days of our solar system.
Lucy's first big target was Dinkinesh, a small# main belt asteroid that surprised everyone when Lucy flew by in 2023.
At the time, it discovered# that Dinkinesh wasn't alone.
It had a tiny moonlet orbiting it.
Then, even more surprisingly,# scientists found that the little moonlet was actually two objects stuck together.
That's# right, a binary moonlet orbiting an asteroid.
Huge surprise!
Proof that even the smallest# objects in our solar system can hold these big mysteries.
By studying these Trojans, Lucy# is helping us retrace the solar systems family tree.
We think the Trojans formed in different# parts of the solar system and then were later captured by Jupiter's gravity.
And that means# each one might be made of something different.
Some might be rocky, some might be# icy, and each could offer different clues about how planets like Earth and Mars and Jupiter# all took shape.
And just like its namesake fossil helped us understand where humanity came# from, Lucy might help us understand where our planet came from in the grand cosmic story.
Lucy's mission reminds us that space exploration isn't just about visiting new worlds.# It's about understanding our own origins.
So, next time you look up at Jupiter shining in the# night sky, remember out there a small spacecraft named Lucy is traveling millions of miles chasing# ancient asteroids to discover the secrets of how all of this began.
Thanks for watching# and as always, I'm Trace.
Keep looking up!
Do you want to know more about the night sky,# space exploration, astronomy?
Let us know down in the comments what you want to know.
And# in the meantime, click this video to learn more.
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Funding provided by The Batchelor Foundation and The William J. & Tina Rosenberg Foundation