The action of napoleons that caused the greatest human losses was invasion of Russia
Absolute magnitude measures only a star's luminosity.
It's a number that tells how bright a star would look if ALL stars were the same distance from Earth.
The God-given right to rule is called A. Divine Right
Both Radioactive dating of rocks retrieved from the world and Comparing cratering rates on one world to those on another.
Geologists can find the relative age of impact craters on a world because
the ones on top must be younger.
Scientists know the history of Earth's magnetic field because the magnetic field gets frozen into rocks, and plate tectonics spreads them out.
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