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Curious facts about cosmic life and their inhabitants.
On July 20, 1969, during one of the defining moments of the human history, Neil Armstrong became the first man to step on the surface of Earth's Moon. In his own words, it was truly "one small step for a man, one giant leap for mankind."
and here is another
When these photos were taken, it was full daylight on the Moon. Because there is only an extremely thin atmosphere on the Moon,the sky appears black. In addition, sunlight at the Moon's surface was incomparably strong with the starlight; the stars simply faded in comparison with the sun. If the astronauts used sufficiently long exposures, stars would, indeed, be visible.
Saturn, along with its frozen retinue of icy rings, dazzling moons, and sparkling moonlets, orbits our Sun about ten times farther out than the Earth. Astronomers received their first collection of detailed data about Titan when the Cassini/Huygens orbiter and lander arrived there in 2004. The Huygens lander successfully obtained revealing images when it drifted down to Titan's tormented, hydrocarbon-slashed surface, as well as when it was still floating slowly and softly down through the moon's thick, foggy, orange atmosphere--which has 1.4 times greater pressure than that of our own planet. These pictures, when combined with other studies using instruments aboard the Cassini orbiter, reveal to curious planetary scientists that Titan's geological features include lakes and river channels filled with methane, ethane, and propane. Titan's strange surface also shows mountains and sand dunes--and it is pockmarked by craters. The rippling dunes form when fierce winds sweep up loose particles from the surface and then tosses them downwind. However, the sands of Titan are not like the sands on our Earth. Titan's "sand" is both bizarre and alien, probably composed of very small particles of solid hydrocarbons--or, possibly, ice imprisoned within hydrocarbons--with a density of about one-third that of the sand on our own planet. Furthermore, Titan's gravity is low. In fact, it is only approximately one-seventh that of Earth. This means that, working in combination with the low density of Titan's sand particles, they carry only the small weight of a mere four percent that of terrestrial sand. Titan's "sand" is about the same light-weight as freeze-dried grains of coffee!
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The scientists modeled different temperatures and water abundances that may have been present in the Moon-birthing disk. At higher temperatures, their disk was primarily composed of silicate vapor, which formed as a result of evaporation of the mantles of both the proto-Earth and the doomed Theia. The disk at these higher temperatures also contained a relatively small quantity of hydrogen dissociated from water. In contrast, at lower temperatures, their disk was primarily composed of water, from which hydrogen did not dissociate under this cooler temperature range--thus making its escape mechanism very inefficient.
In addition to shedding new light on the lunar water-mystery, the new research could also have important implications for future exploration of Earth's Moon. The volcanic beads do not harbor a lot of water--only about.05 percent by weight--but the deposits are large, and the water could potentially be extracted.
If you were to take an Apollo 11 quiz in school, you would likely find that one of the main focuses is the fact that it was the first mission to carry humans to the moon. It was on this voyage that the famous words, "That's one small step for man; one giant leap for mankind," were uttered by Neil Armstrong as he became the first human being to ever set foot on the moon.