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Displaying 1—10 of 1000 matches for query "11._Were_there_or_are_there_a_lot_of_UFO_sightings" retrieved in 0.034 sec with these stats:
- "11" found 38941 times in 14393 documents
- "were" found 34858 times in 7256 documents
- "there" found 19716 times in 3479 documents
- "or" found 21946 times in 6355 documents
- "are" found 19853 times in 5598 documents
- "a" found 169938 times in 18149 documents
- "lot" found 4945 times in 465 documents
- "of" found 295472 times in 20552 documents
- "ufo" found 334 times in 93 documents
- "sight" found 519 times in 383 documents
... , there have been thousands of UFO sightings dating back to biblical times. While most of these can be attributed to weather phenomena, planets, stars or even experimental airplanes, there are some that cannot be explained. Scientists and others are still investigating these other sightings to see what ...
Yes, there are many safety precautions. The Shuttle is placed on the pad at T-43 hours before liftoff. Engineers and ground crew conduct a thorough series of checks to test all of the systems and make sure they work; that they turn on and off as they are supposed to do, and that they are in their default positions, for example. These systems are ...
A lot of the packaging that is thrown away is used in storing the astronauts' food. Much of the trash consists of human waste.
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Answer provided by Russell Romanella & George Veaudry
Image:K2S logosmall.jpg ...
... of propellant to extremely high velocities using high voltages or magnetic fields. There are many different types of electric thrusters. The electric power to operate these thrusters is currently provided by solar panels, and there are ...
Yes, there are different sizes of spacesuits. Each astronaut is individually fitted with his or her own spacesuit. As some astronauts are tall, some are short, some are heavier and some are thin, each suit must be made ... space. Someday, when kids are going into space, spacesuits will be made for kids. You will be able to walk into a spacesuit store and say, "I want a size 13 suit please ...
... is the radiation of concern for human spaceflight: Ionizing radiation, when absorbed in a living cell, ionizes atoms or molecules and may result in cell death or changes leading to cancer or other changes years after exposure. Ionizing radiation can be grouped into three classes of energy ...
There are some strong indications of the presence of water hidden deep within the soils of Mars and there is even an ocean found beneath the thick exterior crust on one of Jupiter's moons, Europa. Since water is important to help life gain a foothold, scientists are eagerly ...
... for deep space missions will be stored as cryogenic liquids, meaning they are normally gases but are compressed to a liquid state to reduce their volume. But cryogens have extremely low ... number of tanks depends on the design of the spacecraft, the mission duration, and the type of propulsion. For electrical propulsion, oxidizers would not be required (since there is no combustion) and only a ...
... travel before you go, the better the trip will be so spend lots of time reading your Kids to Space: A Space Travelers' Guide. Keep fit and slim—the lighter the passengers ... each passenger to able to savor every second of the flight itself but more importantly, we will not require passengers to have special skills or experience.
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Answer provided by Sir Richard Branson ...
... because they complicate the structure of the module shell, allow for more chances of leakage, and let in harmful radiation. Today we certainly understand the importance of windows in a spacecraft, especially in ... practically speaking, the number of windows and their sizes will remain small. Right now we are building four windows on each module for viewing Earth, the Moon or the galaxy from the ...
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