A multiple-impact origin for the Moon

  • Context: Undergrad 
  • Thread starter Thread starter Buzz Bloom
  • Start date Start date
  • Tags Tags
    Moon Origin
Click For Summary
SUMMARY

The discussion centers on the multiple-impact origin theory for the Moon as presented in the January 9, 2017 article from Nature Geoscience. Participants express interest in the improbability and angular momentum arguments related to the Moon's formation, particularly the merger of smaller moons while in a fluid state. The giant impactor theory is highlighted as a compelling explanation due to its simplicity and fewer loose ends, aligning with Occam's razor. Additional references to related research from UCLA suggest that the Moon may be older than previously thought.

PREREQUISITES
  • Understanding of lunar formation theories, including the giant impactor theory
  • Familiarity with angular momentum concepts in astrophysics
  • Knowledge of fluid dynamics as it relates to celestial bodies
  • Access to scientific literature and articles, such as those from Nature Geoscience
NEXT STEPS
  • Research the giant impactor theory in detail to understand its implications for lunar formation
  • Explore the angular momentum argument in astrophysics and its relevance to celestial mechanics
  • Investigate fluid dynamics in the context of planetary formation and moon mergers
  • Read the full article from Nature Geoscience for a comprehensive understanding of the discussed theories
USEFUL FOR

Astronomers, astrophysicists, and students of planetary science will benefit from this discussion, particularly those interested in lunar origins and formation theories.

Buzz Bloom
Gold Member
Messages
2,517
Reaction score
465
Last edited by a moderator:
  • Like
Likes   Reactions: 1oldman2
Astronomy news on Phys.org
This article about the paper goes into a bit more detail and provides a video showing the current and proposed theories. See also this phys.org article.

I would like to see the entire paper. I don't understand the improbability argument. If it happened, it happened, regardless of how improbable it is. The angular momentum argument might be more persuasive but the merger of moons to form the present moon would have to have occurred while the moons were in a fluid state. The time frame for this merger due to outward creep of the moonlets must be fairly long.

AM
 
Last edited:
  • Like
Likes   Reactions: Buzz Bloom
Given the choice between multiple theories, Occam's razor is an appealing discriminator. The giant impactor theory is fairly compelling on those grounds. Fewer loose ends are ordinarily favored absent conficting evidence and I don't see any such that is particularly compelling.
 
  • Like
Likes   Reactions: BvU

Similar threads

  • · Replies 1 ·
Replies
1
Views
3K
  • · Replies 3 ·
Replies
3
Views
4K
  • · Replies 16 ·
Replies
16
Views
4K
  • · Replies 4 ·
Replies
4
Views
2K
  • · Replies 10 ·
Replies
10
Views
2K
  • · Replies 10 ·
Replies
10
Views
4K
  • · Replies 1 ·
Replies
1
Views
208
Replies
4
Views
4K
Replies
2
Views
2K
  • · Replies 2 ·
Replies
2
Views
1K