There is no air in space because there is no gravity to condense the molecules of gases found there into air. On Earth, gravity holds nitrogen, oxygen and the other gases that compose the atmosphere together, but only to about 60 miles above the surface.Know More
A few particles of dust and molecules of gases float in space. Scientists call this mixture interstellar medium. The particles and molecules in interstellar medium are so rare that many people think of space as a perfect vacuum. While it is closer to a perfect vacuum than anything man is able to create on Earth, it is not perfect. Interstellar medium is 99 percent gas, but the gas molecules are very far apart, and hydrogen is the most common gas in the mix. Interstellar dust particles are too small to see with the naked eye and are composed of silicates, iron, ice crystals and carbon.
The air at the surface of Earth has many molecules of gases in a small space. As the distance from the surface increases, the relative concentration of the gases decreases, meaning the air becomes thinner. At the 60-mile level, the concentration begins to change and the atmosphere is primarily lighter gases, such as hydrogen or helium, and closer to the composition of interstellar medium.Learn more about Astronomy
Specific gravity, also known as relative density, is the ratio of the weight of a substance to the weight of an equal volume of water at a temperature of 4 degrees Celsius. The weight value in the equation can be substituted with the density of that substance.Full Answer >
According to teach-nology.com, geometry is used in astronomy to determine the properties of stars and other objects in space. It is developed to be a practical guide in measuring the velocity, area, volume and length of heavenly bodies. Astronomy is the study of these objects, and geometry assists in figuring out their scope and placement in the firmament.Full Answer >
It's highly unlikely that the light beam from the Luxor Hotel in Las Vegas is visible in space. The Luxor Sky Beam would blend in with the bright lights of Las Vegas, making it indistinguishable.Full Answer >
Scientists hope to learn about many aspects of life in space in order to develop and improve methods, materials and technologies that could allow humans to safely and efficiently live in space. Space is a hostile environment for humans, but understanding its inherent characteristics can greatly improve space exploration.Full Answer >