The history of the sun is written on the moon


the moon

Credit: Pixabay/CC0 Public Domain

If you want to learn about the history of the sun, look no further than the moon. This is a recommendation from a team of scientists who hope to harness future Artemis lunar missions to help understand the life history of our star.


The sun has always affected all bodies in the solar system. We not only receive heat and light from the sun, but we also receive a steady rain of high-energy particles and solar wind. And that’s not just happening today, but every day for the past 4.5 billion years.

But on planets like Earth we have lost the ancient history of the sun’s influence on us. Weathering from winds, erosion from water, and the continuous cycles of plate tectonics take whatever changes the sun might have made to our crust and either blow them off or bury them deep in our mantle.

But dead worlds are much better at keeping records, according to New Scientist White papers Recently appeared in the preprint magazine arXiv. and since then the moon He is the closest dead scientist to us, and the object of the series of Artemis quests, we must go to search there.

It is recognized that there has been some surface activity on the Moon since its initial formation, such as lava flow and the effects of asteroids and comets. But this activity is actually an aid rather than a hindrance, according to the white paper. Lava flows can block large portions of the Moon’s surface from further interaction with the Sun. If we could drill down the flows and deep into the regolith of the Moon, we’d get a snapshot in solar history before the lava flows.

And while the resulting effects tend to mix things up, they also expose deeper layers of the surface, giving us easy access to them.

Researchers have identified some key quantities that we can measure moon samples How is it related to the activity of the sun? For example, we can look at how long the sample was exposed cosmic rays And we use that to model the rate at which cosmic rays have been produced by the Sun over the past few billions.

We can also look at the paths left by high-energy particles burrowing into the crust to get the same information.

Over time, the lunar soil slowly turns into breccia, and this process changes with the amount of solar radiation. By comparing different samples at different depths and locations we can understand the change in the brightness of the Sun over time.

According to the white paper, there is no longer an accessible website in Solar System To look at the ancient history of the sun. Simply put, the Moon is a solar time capsule.


Lunar radar data reveals new clues about the moon’s ancient past


more information:
Prabal Saxena, Natalie Curran, Heather Graham, Lunar samples are time capsules of the Sun. arXiv: 2208.13307v2 [astro-ph.IM]And the arxiv.org/abs/2208.13307

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the quote: History of the Sun Written on the Moon (2022, September 19) Retrieved September 20, 2022 from https://phys.org/news/2022-09-history-sun-written-moon.html

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