The Van Allen belts are areas of highly charged particles, mainly electrons and protons, but also with smaller amount of alpha particles.
The dangers to the craft are in the form of radiation which can interfere with, disrupt and damage sensitive electrical equipment. In some space flights electrical equipment has been turned off whilst passing through the belts in order to prevent damage. Of course, space craft also have built-in screening to minimise radiation risks.
To protect astronauts from radiation dangers, spacecraft are fitted with various types of shielding, such as aluminum shielding, and the astronauts also wear protective clothing during this part of their journey. Also the courses/paths were plotted so that the craft would travel through the parts of space where the Van Allen belts are at their thinnest. Despite these precautions, there were and are still serious radiation considerations.
Using calculations of the amount of radiation, the actual time spent passing through the belts, and the shielding used by the Apollo crew, scientists reckoned that the Apollo spacecrafts would pass through the Van Allen belts so quickly that space travellers would not receive any significant life or health-threatening levels of exposure to radiation risks during their flights.
But the matter is not clear cut. There was and is a risk, even if infinitely small. For example, cancers are caused by cell mutation. And sometimes it takes many years for cancer to become evident in a person exposed to harmful radiation. In the Apollo missions the probability of risk was considered to be so small as to be 'nil' for all practical purposes.
Post-flight Developments: In more recent years NASA has reported cases of eye cataracts developing in the majority of astronauts after returning to earth, some within 4 to 5 years of returning, other cases taking 10 or more years to become apparent. Scientists have long known that there is a causal relationship between radiation exposure and cataracts, but whether the astronauts' eye disorders occurred as the direct consequence of passing through the Van Allen belts, or by other radiation in space, or by entirely non-space-flight-related factors is unknown.
Summary: The astronauts got through the Van Allen belts by speed, shielding and carefully planned flight paths, but whether they did so without harm has yet to be determined.
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Their spacecraft was enough to protect them from the Van Allen belt. The radiation they received while going through it was no more than a normal chest x-ray.
3 astronauts flew on multiple Apollo missions * Jim Lovell - Apollo 8, Apollo 13 (intended to land) * John Young - Apollo 10 (later landed on Apollo 16) * Eugene Cernan - Apollo 10 (later landed on Apollo 17) No astronaut has walked on the moon more than once. Additionally 3 astronauts would have flew on multiple Apollo missions and possibly walked on the moon more than once had the program continued past Apollo 17 * Dick Gordon - Apollo 12 (had been slated to land on Apollo 18) * Fred Haise - Apollo 13 was scheduled for Apollo 19 * Stuart Roosa - Apollo 14 (he had also been slated to land on the moon with Apollo 20)
Because there is no known life on the moon. The rocks brought back by the Apollo astronauts showed no evidence of life in the past either.
The past tense of belt is belted.
From Encyclopedia we can get a list of famous & not famous astronomers & astronauts of the past & present.
No. The Kuiper belt is out past the orbit of Neptune.
Yes it is.
The Kuiper belt is a donut shaped area that is past Neptune. the Oort cloud is sphere shaped and is an area past Pluto.
Past The asteroid belt
You can either get the belt from the shattered past pack for tcg or trade and play your cards right.
The austernaughts draw pictures and the xplorers of the past had no power but had moter and mmoter boated
You have to get a shattered past game pack then you can open it but you might not get duelist utility belt. Just trade your good cards or you shattered past game pack and some one will probably give you the utility belt. That's how i got my duelist utility belt. XD Hope that helps for ya!
you go past the sun then down until it says Warning: Entering Asteroid Belt.
Willard Allen Fletcher has written: 'United States-German relations, past and present' -- subject(s): Foreign relations
Yes. Hera forbid Zeus contact with his past "girlfriends".
Apollo is on Bud Isle you will need an Aqua Helmet and a Gramophone to get past his guardian. You can buy both the Aqua Helmet and Gramophone at the Tiger Isle tool shop for 1,100,000 each.
The Toyota MR2 factory recommendations say to change the belt at 90,000 miles. If the belt runs past its use and the belt can snap leading to complete engine failure.
Most asteroids are found in the asteroid belt just out past Mars or in the Kuiper belt which is out past all the planets. Although, rogue asteroids can be found literally anywhere in the solar system.
Joyce Allen has written: 'A Parents Guide. Teaching Reading. Easy as ABC' 'A taste of the past' -- subject(s): Australian Cookery, History
Seat belt and air bags.
No. Astronauts have not even went to other planets.The farthest that astronauts have gone from earth is the surface of the moon.In order to reach the nearest planet, they would have to travel 108 times farther,to reach the sun, 390 times farther, and to reach the nearest star past the sun,108 million times farther.
No. However, Earl Holliman has had notable relationships with Dolores Hart and Valerie Allen in the past.
did you mean a timing belt. the v6 has a chain, and the transmission not like those of the past has no belt, its computer controlled. with a timing belt that would refer to the 2.5 4 cylinder. if you are not very handy go to a mechanic.