The Moon is Older Than Scientists Thought

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fred8615
Posts: 282
Joined: October 12th, 2009, 12:29 pm
Location: Sorrento, LA

The Moon is Older Than Scientists Thought

Post by fred8615 »

The most comprehensive and widely-held theory of how the Moon formed is called the ‘giant impact hypothesis.’ That hypothesis shows that about 150 million years after the Solar System formed, a roughly Mars-sized planet named Theia collided with Earth. Though the timeline is hotly-debated in the scientific community, we know that this collision melted Theia and some of Earth, and that molten rock orbited around Earth until it coalesced into the Moon.

But now a new study, though not contradicting the giant impact hypothesis, is suggesting a different timeline, and an older Moon.

New research from scientists at the University of Cologne’s Institute of Geology and Mineralogy suggests that the Moon is older than the giant impact hypothesis says it is. Their research is based on chemical analyses of Apollo lunar samples and it shows that the Moon formed only 50 million years after the Solar System, rather than 150 million years. This ages the Moon by 100 million years.

This is important work because understanding the age of the Moon helps us understand the age of the Earth. And this type of study can only be done with Moon rocks because they’re largely unchanged since the time of formation. Earthly rocks have been subjected to geological processes for billions of years and don’t provide the same type of pristine record of formation that Moon rocks do.

Read more: https://www.universetoday.com/143025/th ... ts-thought
Frederick J. Barnett
"Someone's got to take the responsibility if the job's going to get done!! Do you think that's easy?!" Gregory Peck - The Guns Of Navarone

fred8615
Posts: 282
Joined: October 12th, 2009, 12:29 pm
Location: Sorrento, LA

The moon is 85 million years younger than previously thought

Post by fred8615 »

It turns out the moon is a little younger than scientists previously thought — about 85 million years younger, to be precise.

In a new study, researchers at the German Aerospace Center found out that, not only did the moon once have a massive, fiery magma ocean, but our rocky satellite also formed later than scientists previously expected.

Billions of years ago, a Mars-size protoplanet smashed into the young Earth and, amid the debris and cosmic rubble, a new rocky body formed — our moon. In this new work, the researchers reconstructed the timeline of the moon's formation. While scientists have previously thought that this moon-forming collision happened 4.51 billion years ago, the new work pegged the moon's birth at only 4.425 billion years ago.

Read more: https://www.space.com/moon-85-million-y ... ought.html
Frederick J. Barnett
"Someone's got to take the responsibility if the job's going to get done!! Do you think that's easy?!" Gregory Peck - The Guns Of Navarone

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