Updated March 15, 2019 13:56:57For decades, the moon has sat in the shadow of Earth’s sun, the Moon is one of the planets in the solar system, and it has been known for centuries that the Earth’s atmosphere contains water.

But there was little to no evidence for water on the surface of the moon before the discovery of ancient artifacts from the ancient Chinese civilization of Stonehenge, according to a new study.

Now, researchers say that the Moon may have been one of those ancient relics.

The study, published in the journal Science Advances, used data from NASA’s Cassini spacecraft, which launched in 2004 and flew by the moon in 2007.

The data, gathered from infrared measurements and infrared-spectroscopy, showed the moon to contain water ice and water, along with other materials.

It was not clear whether the moon had a solid crust, or if it was a liquid that had solidified during a deep freeze, said study co-author Adam Riess, an assistant professor of planetary science at Arizona State University.

For centuries, scientists have been wondering whether water ice could have survived in a frozen moon.

In a 2006 paper, Riess and his colleagues looked at what was known about the Moon and how it reacted to the moon’s environment.

The researchers found that, while water would likely have been present on the Moon’s surface, it was probably not a solid material.

That led them to believe that ice might have been found on the moon at one point, but had long since melted away.

The team of researchers studied the Moon, which was discovered in 1974, by measuring the light from the infrared reflectivity of its surface.

They found that the surface had an average infrared reflectance of about 0.15 microns, or about 1/8th the wavelength of light, and that the moon itself had an absorbance of 1.5 microns.

They also found that when the moon was in the sun’s shadow, it had a surface reflectance at the same wavelength as that of the sun.

The Moon has been an object of fascination for astronomers ever since.

It’s also been a subject of some scientific interest for decades.

The moon was first discovered to be an object in the outer solar system in 1976.

The Hubble Space Telescope has been able to image the Moon since 1997, and the Apollo missions to the Moon in the 1960s and 1970s provided the inspiration for many modern space exploration missions.

Scientists have tried to identify whether or not water is present in the lunar atmosphere since the mid-1970s.

One possibility is that the water might be a form of ice, or that the ice could be water that is solidified into ice in a deep freezing phase.

Other possibilities are that water could be ice in water, and ice could just be water vapor.

However, none of these possibilities has been proven, Riss said.

The scientists used the Cassini mission data to analyze the water ice on the lunar surface and found that it is very similar to that on Earth, Riesses said.

The difference is that, in the past, it’s been hard to distinguish the two.

“This is the first time we have been able so far to compare this lunar ice to that of Earth,” Riess said.

In the new study, Riiss and his team compared the lunar ice samples to samples from Earth and Venus.

They looked at the thickness of the lunar sample, the density of the water, its age, and whether it had water on its surface or not.

They analyzed the chemical composition of the ice samples, the isotopic ratios of elements, and other chemical properties of the sample.

In addition to analyzing the samples, Rioss and his research team also examined how well the ice preserved itself over time.

For the first analysis, they analyzed samples from the Moon for a few days before the ice was exposed to sunlight, and then they looked at those samples for a week or more.

In that study, they found that there was a correlation between the strength of the surface reflectivity and the number of days that the sample had been exposed to light.

The lower the reflectivity, the less water there was on the sample and, therefore, the more time the sample took to melt.

Riess said he thinks that the amount of water on a surface on Earth is related to the thickness and density of that surface.

He said that, on the other hand, in lunar ice, the thickness is linked to how much water is on the material and the density is linked more to how deep in the Earth the material was, so there might be less water than the Earth is.

The researchers said the evidence suggests that the lunar samples may have survived for millions of years in the absence of sunlight, but that the data are still not conclusive.

For now, the researchers say the results are an important step in understanding how the Moon might