“The Earth and the Moon formed under similar conditions in space.”

“A dominant hypothesis states that the early Earth was hit by a Mars-sized object, which spun off material to form the Moon.”

“The Moon lacks plate tectonics and an atmosphere capable of reshaping its surface and recycling elements such as oxygen over billions of years.”

“Rocks formed during early volcanic activity on the Moon offer insight into events nearly 4 billion years ago.”

“A study published March 2026 in the journal Nature Communications investigated ilmenite in a Moon rock crystallized from ancient lunar magma.”

“The study found that about 15% of the titanium in ilmenite carries less of an electrical charge than expected.”

“In ilmenite, titanium typically loses four electrons when bonding with oxygen, resulting in a charge of 4+.”

“The study found some titanium in ilmenite has a charge of 3+, confirming geologists' suspicions.”

“Trivalent titanium occurs only when oxygen availability for chemical reactions is low.”

“The abundance of trivalent titanium in ilmenite indicates oxygen availability in the Moon’s interior 3.8 billion years ago.”

“Over 500 analyses of lunar ilmenite from published studies could contain trivalent titanium.”

“The relationship between trivalent titanium in ilmenite and oxygen availability has not been quantified with experimental data.”

“Studying trivalent titanium could reveal details about the Moon’s chemistry across locations and time periods.”

“Methods can be used to study Apollo Moon rocks, Artemis samples, and rocks from the far side of the Moon returned by China’s Chang’e-6 mission in 2024.”

“Experiments on oxygen availability in magma could reveal how it affects trivalent titanium abundance in ilmenite.”

“Future studies of lunar rocks using advanced methods could reveal chemical conditions on the ancient Moon and provide clues about Earth’s early history.”