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Lunar landscapes
If you look at the lunar surface, it seems pale grey with dark splodges.
The pale grey is a rock named anorthosite. It forms as molten rock cools down. The dark areas are another rock type called basalt. Basalt is the most common surface on all inner planets in our solar system and can be found on the ocean floor.
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Theories on how the Moon formed
Before the Apollo mission research, there were three theories about how the Moon formed.
- Capture theory suggests that the Moon was a wandering body that was captured by Earth's gravity as it passed nearby.
- Accretion the...
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Apollo mission evidence
The Apollo mission brought back rock and soil from the Moon. It showed that the Earth and Moon share chemical and isotopic similarities, suggesting a linked history.
The minerals on the Moon contain less water than similar terrestrial rocks. The Moon has material that form...
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Earth's greatest spinoff
The giant-impact model suggests that, in the Earth's early history, the proto-Earth and Theia (a Mars-sized planet) collided and reformed as one body. A small part of the new mass spun off to become the Moon.
Some suggest that early Earth and Theia came from the same neighbourhood as the s...
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"More than half a century after Fermi asked his question, we have still heard nothing. Despite our communication systems, no one has called. The more we explore our local neighborhood, the lonelier it seems. No concrete signs of any life, not even the simplest bacteria, have been found on the Moo...
Surface
The red planet is actually many colors. At the surface, we see colors as brown, gold, and tan. The reason Mars looks reddish is due to oxidization—or rusting—of iron in the rocks, regolith (Martian “soil”), and dust of Mars. This dust gets kicked up into the atmosphere and from a distance makes t...
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