Sabtu, 09 November 2013

The moon’s face doesn’t tell its whole story


MIT News - 1 hari yang lalu
On a clear night, the moon’s battered history comes into sharp relief: Even from 240,000 miles away, its largest craters are so massive as to be visible to the naked eye. Scientists have long thought that such lunar craters arose during a period called the Late Heavy Bombardment (LHB), about 4 billion years ago. During that time, a hailstorm of giant asteroids pummeled the solar system, slamming into the moon, along with young planets like Mercury, Venus, Earth, and Mars. Evidence for this theoretical period comes mostly from the moon itself. While most traces of Earth’s early hi... lainnya »

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