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If a very large asteroid were to be coming our way, there is very little we could do about it, unless it was discovered far enough in advance—many decades—so that we could deflect its orbit slightly. The best thing we can do is to survey the skies and try to detect any threatening object far in advance, so that we have the necessary time to do something if one is detected. Several search programs are doing this right now. ---- Answer provided by Alan ...

... it will be possible for people to travel to space and live there, but what we can be sure of is that the arrival of affordable and safe manned sub-orbital ...

Yes, we are trying to find aliens now using radio telescopes. These telescopes are like big ears. They listen for radio signals that are from outer space. We do have some instructions on what to do if we ever hear an alien radio ... . The spaceships Voyagers and Pioneers carry special disks that show pictures of humans and where we come from—Earth. The disks also carry greetings in over a hundred different languages ...

... hard to tell, because we are limited by the type of rockets and fuel we use now. Right now, we can travel about 25,000 mph in space. There are a lot of new ideas being studied which may enable us to go faster, but will we ... is hard to say. There is a lot about getting to that speed that we don't know. We need more engineers and scientists to try new ideas. ---- Answer provided by John ...

... , we can bring all these things, but we will have to modify them to use whatever voltage there is on the rocket we are on. We can go to school by using books that are loaded onto our computers, and we can talk to teachers on Earth via a radio link, and even hook up a small TV camera to see each other. If we work ...

... voltage. Also we have to be careful about how much weight we bring along, and how much electricity we are going to use. Being in space means we have to account for everything we use or bring along. If we are a group of people, then we will probably have to ration our electricity and this means we will only ...

... CC) Extra vehicular activity (EVA) astronauts (the ones who do spacewalks) are inside a pressurized spacesuit complete with a helmet. There is a water bag inside with a straw to allow them to drink liquids, and I believe they are also capable of having protein bar-like meals which they can take outside to eat while they are in the suit. You have to remember that EVA crewmembers cannot use their hands to ...

We are going into space to make discoveries in the sciences, medicine, technology, and maybe about our individual selves. People are curious. The Universe around us is now opening up to us because of rocket technology, and we should use that technology and other scientific ...

... the very edge of our technological ability. There are many things that we need to know before planning a human mission to Mars. We are now sending robots to Mars to find these answers ...

... now. Sometimes you can see it at night crossing the sky. We need to do all the planning and design before we can build ships and places off the Earth. ---- Answer provided ...

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