Space19 September 2022

The history of the Sun can be learned by looking at the Moon.

A group of scientists want to use future Artemis lunar missions to understand the life history of our home star.

All of the bodies in the Solar System have been influenced by the Sun. A constant rain of high-energy particles and solar wind is what we get from the Sun.

This has happened every day for the past 4.5 billion years.

We have lost the history of the Sun's influence on us. The weathering from wind, the erosion from water, and the constant cycles of plate tectonics take any alterations that the Sun may have made on our crust and either blew it away or buried it deep within our mantle.

A new white paper states that dead worlds are better record keepers.

Since the Moon is the nearest dead world to us, we should look there.

There have been impacts from asteroids and comets on the Moon. The white paper says that the activity is a help.

The surface of the Moon can be sealed off by lava flows. We would be able to see solar history before the lava flowed if we were able to dig down beneath the flows.

Impacts expose deeper layers of the surface and give us easy access to them.

The researchers showed us a few key quantities that we can measure from lunar samples.

To model the rate of production from the Sun for the past billion years, we can look at how long a sample has been exposed to the sun's rays.

We can look at the tracks left by high-energy particles as they burrow into the ground.

The process of transforming lunar soil into breccia is influenced by the amount of solar radiation. We can see the change in the Sun's brightness by comparing samples at different depths.

There is no more accessible place in the Solar System to look at the Sun's history.

The moon is a time capsule.

This article was published in the past. The original article is worth a read.