11. Meteorite Origins – So Many Problems
Formed in the Nebula Formed by Impact
• Too much Na etc. • Energetic melts lost
• Too much oxygen • Impact velocities not high
• Compound chondrules enough
• No evidence for existence in • Textures unlike crater rocks
space (cosmic ray • Where are the young ages?
tracks, solar wind products) • Oxygen isotope data
• Cooled slowly suggests highly diverse
reservoirs for components
13. Missions to Land, Collect, and Return Samples
are now Technically Feasible
NEAR on Eros on 2001
Hyabusa on Itokawa in 2005
OSIRIS Rex on
1999 RQ36 in 2018
14. To Read More
About It ……
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