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Displaying 1—10 of 1000 matches for query "11._Why_do_we_have_an_ozone_layer_outside_of_our_Earth" retrieved in 0.028 sec with these stats:
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The ozone layer extends from about 6 miles to 60 miles above the Earth's surface. Ozone molecules contain three oxygen atoms. Ultraviolet light from the Sun breaks one oxygen molecule into two separate oxygen atoms. One of these atoms combines with another oxygen molecule to form ozone.
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Answer provided by Robert P. McCoy, Ph.D.
Image:K2S ...
... we have one. None of the other inner planets of the solar system are blessed with such a large companion, and it's thought to have played a vital role in the rise of life on Earth ... that back in the early years of our solar system, say the first couple of tens or hundreds of millions of years, the orbit of the Earth happened to coincide with that of an errant planetoid at least as ...
... star, the Sun, dominates the sky because it is so close. Only during the night do we see the faint light from other stars that are very far away.
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Answer provided by ...
... , we will have exhausted Earth's resources and mankind will need to expand the reaches of human civilization to survive. To ensure we're ready for that, we need to learn more about the effects of long ... and psyche. We also need to develop self-sustaining life support systems that will reduce, and eventually eliminate, the need for re-supply from Earth, allowing us to complete spaceflights of a thousand ...
... is propelled by propellants. Propellants are usually made up of two materials—a fuel and an oxidizer, termed bi-propellants. Various types of fuels and oxidizers may be used. For example, the ... V-2 rocket used alcohol and oxygen. The Atlas rocket used kerosene and oxygen. But of all these, hydrogen has the highest energy content per pound.
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Answer provided by Jon H ...
... , we have always pushed the envelope of exploration whether it be exploring new lands on Earth or diving to explore the deepest abyss in the oceans. We have a need to know and to understand our world ... after the stars end their lives. This is why Dr. Carl Sagan called us "third generation star stuff". Is it any wonder that we want to go back into space and explore ...
... to the equator we are, the more benefit we will receive from the rotation of the Earth during ascent. Normally, we launch eastward, so being on the east coast is nice as we don't launch ...
We have departments that determine the right technology necessary for the current mission. We usually are not that far from the right technology. It is either stowed aboard the ... do to learn. We've always been explorers. It's in our nature as a people to explore beyond the boundaries of our knowledge and limitations. Exploring in space is part of that learning process and we ...
... it. The reason we float is that the force of gravity that pulls us to the Earth is exactly counterbalanced by the outward force of the vehicle as it circles the Earth. This is called ...
... many years in the future, we'll think about missions above the Earth. We'd need to bring all the chemicals or plants or animals that are the subjects of our mission, and the equipment ... be necessary to have a freezer for the storage of collected samples like seeds, eggs or blood specimens. And don't forget the computers, memory storage devices, and notebooks with our experiment procedures ...
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