The last episode of cosmic travel Scientists have been reconstructing the history of the moon purging the surface, mapping its mountains and craters, and snooping inside. What are they learning about the origins of our own planet? Few decades ago, we sent astronauts to the moon as a symbol of confidence in the confrontation of the Cold War.
The moon hallway was a giant leap for mankind. But it’s what the astronauts collected from the moon’s surface which can be the greatest legacy of Apollo. When the Apollo astronauts left their landing craft enter a world wrapped in sticky dust, full of rocks, and dotted craters. They walked and wandered for him, collecting rocks packed for the return journey. Returning to Earth bound laboratories, scientists set to work researching the rocks for clues to one of the most confounding questions of all science. Where does the moon? The answer promised to shed light on an issue even bigger. Where does the Earth? And how evolved into the planet we know today? Nature of the moon began to come into focus four centuries ago. Galileo Galilee heard of an instrument built by a Dutch optician able to see distant things as if they were in the vicinity Galileo, in many ways the first determine an issue long haul.
What was the nature of heaven, and how the world of men fit into it? For some philosophers, the moon was a perfect sphere and crystal divine substance, free from the imperfections of the Earth. Galileo with his telescope, he saw a familiar reality. Pointed mountains and valleys on the moon, features like those on Earth. Apollo astronauts took off in a series of missions to get a close look at the moon and perhaps settle the debate. Since there is no atmosphere there, the astronauts went into landscapes that are almost frozen in instance. They can search the lunar surface for evidence of facts that go back almost to the time of his birth. Indeed, eons of impacts were open to the interior of the moon, leaving a lot of information scattered for their old large craters were surrounded by concentric rings. You can see one of the most definite in this image of the Mare Oriental, recently captured by the Lunar Reconnaissance Orbiter, or LRO, from NASA. The colors indicate differences in elevation. The traditional view was that the impact had melted rock underneath.
A more recent view that the impact or had felt really splashed down on a melt surface. That led to the radical notion that, early in its history, was covered the surface of the moon by a vast ocean of magma. When astronauts arrived, they found relatively light rocks known as .
Their presences suggest that the heavier material had sunk into the moon, forcing a lighter material positioned on the surface. Rocks brought back turned out to be strikingly similar to those on Earth, partly because shared forms of oxygen, called isotopes, which scientists consider as blood types of solar system bodies. Next there was this. The moon seemed to be completely, absolutely, dry, without any evidence that water had ever been present resting on its exterior.