8th Quasi Moon of Earth Found! Here's What We Know
Earth Gains Eighth Companion: Discovery and Properties of Quasi-Moon 2025 PN7
Learn the critical differences between a true moon and a quasi-moon, and discover why this newly found Earth companion significantly impacts our understanding of solar system dynamics.
Short Summary
- Earth officially tracks eight confirmed quasi-satellites, which share our orbit around the Sun but appear to orbit us from our perspective.
- The newest addition, 2025 PN7, measures only 19 meters across and is highly unstable, predicted to leave Earth's resonant orbit within 130 years.
- Studying the composition of stable companions, like 2016 HO3, offers direct clues about the Moon’s violent past, potentially confirming an ejected lunar origin.
This video orients the reader to the definition and context of Earth's quasi-moons, focusing on the accidental discovery of 2025 PN7 and explaining how these objects help scientists trace ancient solar system collisions.
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Top Comments (10)
We should name it Quasimoondo
I never knew we had any quasi-moons, much less 8. Anton, the hardest working man in space.👏🏼👏🏼
Thank you, Anton. Your channel is the best for up-to-date science information.
Anton is such a gift to humanity
What?! Who knew? Anton, this is why I love your videos!
Capturing a moon large enough to keep a planets core molten, so as to produce a sufficient magnetic field to shield the planet from energetic particles, is probably a prerequisite for life to develop.
Thanks anton have a great weekend everyone!
Thank you for teaching us something every time. You are a brilliant young man.
"Greyhound", since the 2025.. is the size of a bus, and you don't want to be hit by it. :) Thanks for all your hard work Anton,and using it to teach us. I really enjoy the 'animations' during your closing minutes too.
Arjuna is one of the main characters of the Bhagavad Gita. Very good name choice.
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Top Comments (10)
We should name it Quasimoondo
I never knew we had any quasi-moons, much less 8. Anton, the hardest working man in space.👏🏼👏🏼
Thank you, Anton. Your channel is the best for up-to-date science information.
Anton is such a gift to humanity
What?! Who knew? Anton, this is why I love your videos!
Capturing a moon large enough to keep a planets core molten, so as to produce a sufficient magnetic field to shield the planet from energetic particles, is probably a prerequisite for life to develop.
Thanks anton have a great weekend everyone!
Thank you for teaching us something every time. You are a brilliant young man.
"Greyhound", since the 2025.. is the size of a bus, and you don't want to be hit by it. :) Thanks for all your hard work Anton,and using it to teach us. I really enjoy the 'animations' during your closing minutes too.
Arjuna is one of the main characters of the Bhagavad Gita. Very good name choice.